Energy Saving Solution for renovation of heating and cooling ytem 18cae with payback time calculation how you how fat your invetment will be repaid by energy aving. www.hbc.danfo.com
Structure.1 Introduction 3 1.1 Recommended olution for heating ytem 4 1.2 Recommended olution for cooling ytem 6 2.1 Two-pipe heating ytem in long reidential building 8 2.2 Two-pipe heating ytem in medium high reidential building 1 2.3 Two-pipe heating ytem in medium high reidential building 12 2.4 Two-pipe heating ytem in high reidential building 14 2.5 Two-pipe heating ytem in medium high reidential building 16 2.6 Two-pipe heating ytem in imilar reidential building 18 3.1 One-pipe heating ytem in pecial haped medium high reidential building 2 3.2 One-pipe heating ytem in pecial haped medium high reidential building 22 3.3 One-pipe heating ytem in pecial haped medium high reidential building 24 4.1 Dometic hot water ytem in long reidential building 26 4.2 Dometic hot water ytem in long reidential building 28 4.3 Dometic hot water ytem in high reidential building 3 5.1 Cooling ytem comparion in pecial haped office building 32 5.2 Cooling and heating ytem in medium high office building 34 5.3 AHU pumping cot comparion in commercial building (cooling application) 36 6.1 Energy aving in macro cale 38 6.2 Energy aving in macro cale 4 6.3 Energy aving in macro cale 42 2
Introduction The main reaon of thi Energy Saving Brochure i to anwer the quetion whether invetment in renovation of engineering ytem like central heating, cooling or dometic hot water ytem are economically reponible? When can return on invetment be expected? The development of thi brochure i baed on our cutomer energy conumption before and after renovation collected during a period of multiple year. The information ha been obtained from energy bill iued by heat or electric energy upplier and i therefore reliable reference information that allow etimation of the effectivene of the renovation. When we analyzed the 18 preented cae, realitic cot were taken into conideration related to deigning, purchaing and mounting of the equipment a well a launch cot when applicable. All data wa collected in a uniform method and pecial attention given to the different tage of renovation. Each cae allow identification of what reult can be expected per tage of renovation (e.g. mounting thermotatic radiator valve or balancing valve, etc.) Upon receiving conent from our cutomer we have decided to provide precie information about citie and addree where renovation ha taken place. Firtly we would like to preent tranparent information to give the reader the poibility to check the preented data. Secondly to provide inight in the local cot for energy, and different price for deign, purchaing and intallation of the equipment. Pleae keep in mind that thee cot might differ from country to country. In order to make calculation and comparion of energy conumption we have ued pecialized method of converion (e.g. degree-day method) uually applied by energy auditor. The preented cae are grouped according to theme: Chapter 2: reult obtained during renovation of typical two-pipe heating ytem by mounting thermotatic radiator valve (RTD, RA and RTS) a well a automatic balancing valve (differential preure regulator of ASV type). The differential preure regulator provide a table working condition for thermotatic radiator valve, which help achieve additional energy reduction while providing high indoor comfort. Chapter 3: reult obtained during renovation of one-pipe heating ytem. Due to the pecific character of thee type of ytem, beide uing thermotatic radiator valve, different type of balancing valve ha been ued (AB-QM) which have been extended with thermotatic actuator (QT). With thi combination of product it i poible to control the flow in the rier and balancing i done by control of return temperature. Chapter 4: reult obtained from renovation of dometic hot water ytem by mounting multi-functional temperature control valve (MTCV). Thee valve provide thermotatic balancing of the ytem a well a reduction of the flow to an eential minimum in order to compenate heat loe and provide required temperature at the tap location. Chapter 5: reult obtained from renovation of cold water upply ytem in air conditioning ytem for air-handling unit (AHU) and fan coil unit (FCU). In thee ytem we have applied preure independent preure and control valve (AB-QM). Chapter 6: reult obtained from renovation in macro cale to how the amount of generated energy, which can have coniderable meaning for large, global project (e.g. project that are financed by government or thermo renovation fund). Modernization in macro cale include renovation of central heating ytem, dometic hot water ytem and ditrict heating ub tation. The return on invetment period that are preented vary from 6 month to 6 year depending on the application, building ize and ytem type. It i worth mentioning that high profitability of the mentioned invetment were achieved by the ue of Danfo product. We hope that the given example will help in the deciion making proce related to renovation. Danfo can ait you by recommending and offering the right olution for each tage in renovation to optimize heating & cooling ytem, improve the indoor comfort and achieve maximum energy aving. 3
RECOMMENDED SOLUTION for heating ytem 1.1 Recommended olution for heating ytem HEATING SYSTEM ONE PIPE ytem TWO PIPE ytem Sytem with or without S Sytem with or without S Sytem with S Without preetting With preetting RECOMMENDED ADJUSTABLE FLOW LIMITER: AB-QM, QT, CCR3 ACCEPTABLE MSV-BD LENO, MSV-B/S/O LENO RECOMMENDED ASV-P + ASV-I ASV-PV + ASV-I RECOMMENDED ASV-P + ASV-M ASV-PV + ASV-M RECOMMENDED ASV-PV + MSV-F2 (with impule tube) 4
Sanitary water ytem Sytem without S Upgrade to S not poible Upgrade to S i poible Dometic hot water circulation ytem RECOMMENDED MSV-B/S/O LENO, MSV-BD LENO /USV I RECOMMENDED USV-M + USV-I (upgradable) RECOMMENDED MTCV, CCR2 5
RECOMMENDED SOLUTION for cooling ytem 1.2 Recommended olution for cooling ytem COOLING SYSTEM CONSTANT FLOW Automatic balancing Manual balancing RECOMMENDED ADJUSTABLE FLOW LIMITER: AB-QM ACCEPTABLE MSV-F2, MBV-BD LENO, MSV-B/O/S LENO 6
VARIABLE FLOW Preure controller Combined preure independent control Fixed preure Adjutable preure Control valve with actuator and automatic adjutable flow limiter RECOMMENDED ASV-P + ASV-M RECOMMENDED ASV-PV + ASV-I RECOMMENDED AB-QM + TWA-Z AB-QM + ABNM AB-QM + AMV(E) RECOMMENDED ASV-PV (flange) + MSV-F2 (with impule tube) 7
STRONGLY RECOMMENDED INVESTMENT! 2.1 Two-pipe heating ytem in medium high reidential building Type of building Name of project Main data Picture of building Medium high building Building Society Na Skarpie Kozalin, Poland Addre: Dąbrozczaków 3 Number of floor: 12 Number of taircae: 1 Number of flat: 68 Heated pace: 13.885 m 3 Number of radiator: 637 Number of rier: 3 THE PROJECT Thi building wa built in 1977 with block of flat technology (concrete panel). The moderniation ha been done in everal tep. In 1994 and in 1995 heat cot allocator were intalled on the radiator. In 1999 the wall wa inulated. In 22 Δp controller were intalled in the bottom of the rier. In the invetigated period the outdoor temperature wa varying in a wide range therefore the correction of energy uage i very important. RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 1996 AND 22) A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 1-2 (637 all together) ABPC ABPC EXCHANGER B Differential preure controller pair in the bottom of the rier: ASV-PV + ASV-M Dimenion: DN 15-32 (1, 5, 1, 5 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 8
SAVINGS Invetment type ASV Intallation Invetment cot [ ] 4947 Av. yearly energy aving [GJ] 383,2 Energy price (DH) [ /GJ] 8,2 Pay back time [year] 1,6 Energy uage [GJ] Energy Saving [%] 4 35 3 25 2 15 1 5 year 16 14 12 1 8 6 4 2 2 21 22 23 24 25 26 27 28 Calculation i baed on year 21 compared to 22-28 INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Dp controller into the rier 3 4644 33 4947 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage (heating) [GJ] Corrected energy uage to 6,7 C Saving in % compared to 2 Saving in % due to automatic balancing valve comp. to 21 Average outdoor temp. [ C] 2 1 431 1 431 6,7 21 1 761 1 296 9,5% 4,8 Average energy aving [GJ] 22 1 466 1 79 24,6% 16,7% 4,8 ASV intallation 23 1 35 886 38,1% 31,7% 4,19 24 1 173 895 37,5% 31,% 5,5 25 1 134 81 44,% 38,2% 4,5 Roof inulation 383,16 26 1 131 769 46,3% 4,7% 4,2 27 1 19 1 31 28,% 2,4% 6,3 28 1 15 93 35,1% 28,3% 5,7 Action CONCLUSION The intallation of dedicated differential preure controller in the bottom of the rier bring an average of 31,3% energy aving on a yearly bae. (The intallation of ASV-PV valve i hown with a grey column in above diagram). In the year 22 when the ASV intallation wa done, the energy aving i half of the average, due to the reult of intallation concern a half eaon only. The colder the outdoor temperature, the higher the energy aving will be, due to the Δp controller (year 26). The roof inulation doe not reult in perceptible energy aving. (In a high building only a few flat are affected by thi action). The pay back time of a Δp controller intallation (le than 2 year) i very good. 9
STRONGLY RECOMMENDED INVESTMENT! 2.2 Two-pipe heating ytem in medium high reidential building Type of building Name of project Main data Picture of building Medium high building Building Society Wpólny Dom Szczecin, Poland Addre: Chopina 4 Number of floor: 11 Number of taircae: 1 Number of flat: 66 Heated pace: 9.88 m 3 Number of radiator: 389 Number of rier: 26 THE PROJECT Thi building wa built in 1982 with block of flat technology (concrete panel). The moderniation ha been done in everal tep. In 1996 were intalled in front of the radiator and in 24 the wall and roof were inulated. In 23 heat cot allocator were mounted onto the radiator. (In that time the manual balancing remained original). After further inulation, in 25 the building wa equipped with Δp rier controller. In the invetigated period the outdoor temperature wa varying in a wide range therefore the correction of energy uage i very important. RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 1996 AND 25) A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 15 (389 pc.) ABPC ABPC EXCHANGER B Differential preure controller pair in the bottom of the rier: ASV-PV + ASV-M Dimenion: DN 15-25 (26 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 1
SAVINGS Invetment type ASV-PV/M Invetment cot [ ] 3724 Av. yearly energy aving [GJ] 276,3 Energy price (DH) [ /GJ]* 13,2 Energy uage [GJ] Energy Saving [%] 75 6 45 3 15-15 year 25 2 15 1 5 1999 2 21 22 23 24 25 26 27 28 Pay back time [year] 1, * Thi price i baed on local DH company price INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Dp controller into the rier 26 255 1174 3724 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage (heating) [GJ] Corrected energy uage to 5,1 C Saving in % compared to 1999 Saving due to automatic balancing copm. to 23-25 Average outdoor temp. [ C] Average yearly energy aving (GJ) 1999 2169 2169,% 5,1 intallation in 1996 2 1787 2348-8,3% 6,75-21 245 21 7,7% 4,95 22 1792 1712 21,1% 4,78-23 1837 1534 29,3% 3,74 HCA* intallation 24 1354 136 37,3% 5,13 Wall and roof inulation 25 1141 1236 43,% 5,63 ASV intallation 26 124 868 6,% 29,8% 3,86 27 851 112 53,3% 18,1% 6,2 * HCA Heat Cot Allocator 28 867 1 53,9% 19,1% 6,2 276,3 Action CONCLUSION With inulation of wall and roof in thi building we can achieve ignificant energy aving (2-25%) With the application of heat cot allocator we are able to reduce the energy uage with another ~15%. The intallation of dedicated differential preure controller in the bottom of the rier caue an average of 22% further energy aving on a yearly bae. (The intallation of ASV-PV valve i hown with a grey column in above diagram). The energy aving due to Δp controller i projecting in cae of low outide temperature (year 26). The pay back time of Δp controller intallation (1 year) i very good. 11
RECOMMENDED INVESTMENT! 2.3 Two-pipe heating ytem in long reidential building Type of building Name of project Main data Picture of building Long building Building Society Wpólny Dom Szczecin, Poland Addre: Zakole 27-36 Number of floor: 5 Number of taircae: 1 Number of flat: 73 Heated pace: 14.938 m 3 Number of radiator: 542 Number of rier: 14 THE PROJECT Thi building wa built in 1976 with block of flat technology (concrete panel). The moderniation ha been done in everal tep. In 1996 thermotatic radiator valve ( ) were intalled in front of the radiator. The building wa inulated tep by tep, in 1999 the end of the building, in 24 the roof and the remaining wall in 27. In 23 heat cot allocator were mounted onto the radiator. (In that time the manual balancing ytem remained original). In 25 the building wa equipped with p rier controller. In 26 the dometic hot water (DHW) circulation wa modernied with a return temperature limiter (ee chapter 4.1). RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 1996 AND 25) A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 15 (542 pc.) ABPC ABPC EXCHANGER B Differential preure controller pair in the bottom of the rier: ASV-PV + ASV-M Dimenion: DN 15-25 (14 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 12
SAVINGS Invetment type ASV-PV/M Invetment cot [ ] 1674 Av. yearly energy aving [GJ] 25, Energy price (DH) [ /GJ]* 13,2 Energy uage [GJ] 3 25 2 15 1 5 year Energy Saving [%] 1999 2 21 22 23 24 25 26 27 28 6 5 4 3 2 1 Pay back time [year] 5,9 * Thi price i baed on local DH company price INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Dp controller into the rier 14 1164 434 1674 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage (heating) [GJ] Corrected energy uage to 5,1 C Saving in % compared to 1999 Saving due to automatic balancing comp. to 23-25 Average outdoor temp. [ C] Average yearly energy aving (GJ) 1999 326 326,% 5,1 part of wall inulation* 2 2284 32,8% 6,75-21 2599 2544 15,9% 4,95 22 236 223 27,2% 4,78-23 228 1845 39,% 3,74 HCA** intallation 24 186 1868 38,3% 5,13 roof inulation 25 1755 191 37,2% 5,63 ASV intallation 26 1794 1521 49,7% 18,7% 3,86 27 1468 1747 42,3% 6,7% 6,2 25, remaining wall inulation 28 151 1732 42,8% 7,5% 6,2 * intallation in 1996 ** HCA Heat Cot Allocator Action CONCLUSION With inulation of wall and roof we can achieve ignificant energy aving (15-25%). With the application of a heat cot allocator we are able to reduce the energy uage with another ~15%. The intallation of dedicated preure controller in the bottom of the rier caue an average of 11% further energy aving on a yearly bae. The energy aving due to p controller i projecting in cae of low outdoor temperature (year 26). The pay back time of p controller intallation i acceptable (le than 6 year), to be taken into conideration that thi i not a high building, thu one preure differential controller handle 5 thermotatic radiator valve only. 13
STRONGLY RECOMMENDED INVESTMENT! 2.4 Two-pipe heating ytem in high reidential building Type of building Name of project Main data Picture of building High building Building Society Oiedle Młodych Poznań, Poland Addre: Tyiąclecia 7 Number of floor: 16 Number of taircae: 2 Number of flat: 128 Heated pace: 19.5 m 3 Number of radiator: 576 Number of rier: 4 THE PROJECT Thi building wa built in 1983 with block of flat technology (concrete panel). The moderniation ha been done in everal tep. In 1995 and in 1996 heat cot allocator were intalled on the radiator. In 1999 the wall became inulated. In 25 Δp controller were intalled in the bottom of the rier. In the invetigated period the outdoor temperature wa varying in a wide range therefore the correction of energy uage i very important. RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 1995 AND 25) A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 1-2 (576 all together) ABPC ABPC EXCHANGER B Differential preure controller pair in the bottom of the rier: ASV-PV + ASV-M Dimenion: DN 15-32 (2, 4, 14, 2 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 14
SAVINGS Invetment type ASV Intallation Invetment cot [ ] 6631 Av. yearly energy aving [GJ] 74,4 Energy price (DH) [ /GJ] 8,79 Energy uage [GJ] Energy Saving [%] 6 5 4 3 2 1 year 1997 1998 1999 2 21 22 23 24 25 26 27 28 5 4 3 2 1 Pay back time [year] 1, Calculation i baed on period 1997 24 compared to 26-28 INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Dp controller into the rier 4 5597 134 6631 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage (heating) [GJ] Corrected energy uage to 5,2 C Saving in % compared to 1997 Extra aving in % due to automatic balancing (25) Average outdoor temp. [ C] Average yearly energy aving (GJ) Action 1997 4194 4194 5,2 1998 3167 3697 24,5% 6,2 1995, 1996 HCA intallation 1999 3358 2999 28,5% 4,4 Inulation of building 2 366 3264 22,2% 5,6-21 367 2873 31,5% 3,5 22 3328 2715 35,3% 3,7-23 3488 2486 4,7% 2,5 24 3184 2661 36,5% 3,9 25 326 276 35,5% 9,8% 4,4 ASV intallation 26 2863 275 5,5% 3,8% 2,7 27 2493 2411 42,5% 19,6% 5, 28 2292 2161 48,5% 27,9% 4,8 74,44 CONCLUSION The intallation of dedicated differential preure controller in the bottom of the rier reult in a 26,3% energy aving on a yearly bae. (The intallation of ASV-PV valve i hown with a grey column in above diagram). In the year 25 when the ASV intallation wa done the energy aving i half of the average due to the reult of intallation concern a half eaon only. The inulation of the building doe not reult in perceptible energy aving. (In high building only a few flat are affected by thi action). The pay back time of a Δp controller intallation (1 year) i very good. 15
STRONGLY RECOMMENDED INVESTMENT! 2.5 Two-pipe heating ytem in medium high reidential building Type of building Name of project Main data Picture of building Medium high rie building Building Society Katowicka Katowice, Poland Addre: Lubuka treet 7-9 Number of floor: 11 Number of taircae: 2 Number of flat: 6 Heated pace: 15612 m 3 Number of radiator: 294 Number of rier: 14 THE PROJECT Thi building wa built in 1987 with block of flat technology (concrete panel). The moderniation ha been done in everal tep. In 1996 and heat cot allocator were implemented (in that time the manual balancing remained original). In 2 the ub-tation wa renovated (preure controller). In 22 the building wa etablihed with automatic balancing valve in the bottom of the rier ( p controller). In 25 the block ub-tation wa eparated to a dedicated ub-ub-tation for each building. RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 1996 AND 22) A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 15 ABPC ABPC EXCHANGER B Differential preure controller pair in the bottom of the rier: ASV-PV + ASV-M Dimenion: DN 15-32 (4, 3, 4, 3 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 16
SAVINGS Invetment type only ABV in S.St.** ASV-P/M Sum Invetment cot [ ] 4816 185 241 7226 Av. yearly energy aving [GJ] 365,7 Energy price (DH) [ /GJ]* 6,49 476,5 6,49 97,6 6,49 795,5 6,49 Energy uage [GJ] Energy Saving [%] 25 2 15 1 5 year 1999 2 21 22 23 24 25 26 27 28 5 4 3 2 1 Pay back time [year] 2,,4 3,8 1,4 * Thi price i baed on local DH company price ** S.St. Sub Station INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Radiator valve (RTD) 294 2964 1117 481 Heat cot allocator 294 735 735 Central Dp controller 1 685 4 185 Dp controller into the rier (ASV-PV, ASV-M) 14 1892 518 241 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage (heating) [GJ] Corrected energy uage to 2,4 C Saving in % compared to 1995 Saving in % due to automatic balancing valve comp. to 1999 Extra aving in % due to automatic balancing (22) Average outdoor temp. [ C] 1995 284 2,4 Energy aving in GJ comp. to previou period* 1996 26 1945 6,7% 2,1, HCA intallation 1997 1741 1878 9,9% 3,1 1998 176 1837 11,9% 2,8 1999 1537 1757 15,7% 3,6 2 155 2247-7,8% 5,6 p contr. in ub-tation 21 1167 1347 35,4% 23,3% 3,7 476,5 22 1161 1348 35,3% 23,3% 3,7 ASV intallation 23 1275 1259 39,6% 28,3% 6,6% 2,3 24 168 124 4,5% 29,4% 8,% 3,7 25 978 1126 46,% 35,9% 16,5% 3,7 Sub-tation eparation 26 96 945 54,6% 46,2% 2,3 27 676 98 53,% 44,2% 5,4 28 853 1248 4,1% 28,9% 5,4 97,6 365,7 Action CONCLUSION The energy aving potential i huge in thee type of building. With we can reduce the energy uage with more than 1%. In cae of Δp controller in the building we can ave another 23% of energy! With dedicated differential preure controller in the bottom of the rier we can ave an additional 6-8% of energy. (If the p controller had not been intalled into the ub-tation the aving would have appeared here like in previou cae). All together becaue of the Δp controller the total aving i cloe to 3%. The pay back time in thi project wa very low (le than two year), becaue of the automatic balancing in the rier. 17
RECOMMENDED INVESTMENT! 2.6 Two-pipe heating ytem in imilar reidential building Type of building Name of project Main data Picture of building Building Society NAZORA treet Tuluza, Bonia Addre: Nazora 6 and 12 Number of floor: 5 Number of flat: 15 Heated pace: 1971 m 3 Number of radiator: 5 Number of rier: 13 Two ame ize and location building comparion before and after renovation THE PROJECT Thi building wa built in 1962 with traditional building technology (brick wall). The moderniation ha been done in the ummer of 25. During that time one of the building (V.Nazora 12) wa equipped with, heat cot allocator and automatic balancing valve. The other building (V.Nazora 6) wa renovated in the ame way, but only with manual balancing in the bottom of the rier. The inulation of the building wa not renovated, the wooden window and door are till original. The heat ource of the building i ditrict heating. RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 25) A Thermotatic radiator valve for each radiator: RA-N + thermo head RAE Dimenion: DN 15 (5 pc.) ABPC ABPC EXCHANGER B Differential preure controller pair in the bottom of the rier: ASV-P + ASV-M Dimenion: DN 15-2 (5, 8 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 18
SAVINGS Invetment type ASV-P/M Invetment cot [ ] 616 Av. yearly energy aving [GJ] 23,9 Energy price (DH) [ /GJ] 3,38 Pay back time [year] 4, Energy uage for heating [GJ] 35, 3, 25, 2, 15, 1, 5,, Nazora 6 Nazora 12 Oct. Dec. Feb. April Oct. Dec. Feb. April Oct. Dec. Feb. April year: 24/5 year: 25/6 year: 26/7 The invetment cot difference between building: 1665-149=616 EUR (baed on price difference of balancing.) INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Remark Dp controller into the rier 13 113 562 1662 Nazora 12 Manual balancing 13 487 562 149 Nazora 6 Radiator valve 5 44 19 594 In both building Heat cot allocator 5 125 125 In both building ENERGY USAGE AND ENERGY SAVING OF BUILDING Energy uage (heating) [GJ] Energy uage (heating) [GJ] Building V. Nazora 6. V. Nazora 12. Month/Year 24/25 25/26 26/27 24/25 25/26 26/27 October 2,7 7,7 7,1 2,5 6, 5,2 November 22,6 24,9 18,4 22,6 21, 14,2 December 3,3 26,5 29,5 3,8 23,2 24,4 January 27,3 31,3 2,6 29,5 27,2 16,9 February 29, 3, 18,7 3,7 25,7 14,4 March 23,5 23,1 15,6 24,2 18,9 11,9 April 12, 7,2 1,2 12,3 6,2 7,8 Sum 147,4 15,7 12,1 152,5 128,2 94,8 Energy aving compared to V. Nazora 6. -3,3% 17,5% 26,7% CONCLUSION The energy aving potential i ignificant. With a heating ytem renovation (+ABV) only we can reduce the energy uage around 2-3%. (With inulation and renovation of the window further aving can be achieved). Very well viible on the above graph i that the original higher energy conumption of the building (dark grey line) i much lower than the building which wan t renovated (red line). The pay back time of the invetment i acceptable. Including the total heating renovation expene, the pay back time i four year. IT IS WORTH CONSIDERING MAKING THE INVESTMENT! The pay back time i in thi cae not outtanding, but good enough. We have to take into conideration the relatively low energy price, but alo the increaing comfort. 19
STRONGLY RECOMMENDED INVESTMENT! 3.1 One-pipe heating ytem in pecial haped medium high building Type of building Name of project Main data Picture of building Low building Wohnunggeellchaft der Stadt Deelitzch, Germany Addre: tr. Sonnenwinkelweg 2-8 Number of floor: 5 Number of flat: 4 Heated pace: 6 84 m 3 Number of radiator: 18 Number of rier: 36 THE PROJECT The building wa built in 1982 with concrete panel technology. The heat ytem ued in thi building wa a typical one pipe ytem with bypa for flow control a rier controller only manual hut off valve were ued. In 1992 the heating ytem wa redeigned manual hut off valve were replaced for thermotatic radiator valve (RA-D type). In the ame time heat cot allocator were implemented on each radiator, which allowed introducing individual energy conumption calculation. In 1995 a next tep in thermo moderniation proce wa done: wall iolation and replacement of the window. In 26 the one pipe heating ytem wa renovated again concerning the water ditribution. Thi time automatic flow limiter (AB-QM) with thermal actuator (TWA) and thermotat on the pipe (AT-type) were intalled in rier for proper water balancing. In the ame time a imilar building, which i located near to the original project building, wa left without rier balancing. So we could compare the energy efficiency of the renovated building. Thi type of olution allow controlling the return temperature. During a partly loaded condition, when ome of the radiator are cloed, the return temperature i increaing. Thi reult in hot water that i circulating unneceary in the ytem. RADIATORS AT RADIATORS AT USED DANFOSS EQUIPMENT FOR RENOVATION (IN 1992 AND 26) A Thermotatic valve RA-D Dimenion: DN 1-2 (18 pc.) B Automatic flow limiter AB-QM with TWA actuator Dimenion: DN 15 (36 pc.) and AT thermotat element. PIBV PIBV EXCHANGER FROM HEAT SOURCES Thermotatic Radiator Valve PIBV Preure Independent Balancing Valve (a flow limiter) AT Pipe Thermotat 2
SAVINGS Invetment type AB-QM (AT +TWA) Invetment cot [ ] 6144 Av. yearly energy aving [GJ] 235 Energy price (DH) [ /GJ] 8 Pay back time [year] 3,3 monatlicher Verbrauch MWh 5 4 3 2 1 monthly uage (MWh) Sonnenwinkelweg 2 8 Sonnenwinkelweg 1 16 Jan, Feb, Mar, Apr, May, Jun, July, Aug, Sep, Oct, Nov, Dec year: 26 INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum AB-QM (TWA+AT) 36 55 644 6144 ENERGY USAGE AND ENERGY SAVING OF BUILDING Building 5 with AB-QM and AT tr. Sonnenwinkelweg 2-8, Sachen Building 6 without tr. Sonnenwinkelweg 1-16, Sachen Energy ued in MWh 26 27 28 171 132 124 211 213 199 difference in MWh 4 81 75 Average yearly energy aving [GJ] 235 CONCLUSION A new concept of one pipe regulation, baed on return temperature control, bring an additional 2% aving during one heating operation eion. It i very important to note that one pipe heating ytem, when ued with a by-pa on the radiator, that thi automatically mean that the radiator thermotat can only cloe the flow through the radiator. But when the are cloed the water can till circulate through the by-pa at all time. Thi provide a ituation where the return temperature in the bottom of the rier will increae. A thermotat detect a higher return temperature, what allow reducing the flow. (Thi i not neceary when are cloed). Thi type of olution make a one pipe ytem a very efficient and variable flow ytem. In the above graph we can ee the monthly ued energy comparion between the two building. 21
STRONGLY RECOMMENDED INVESTMENT! 3.2 One-pipe heating ytem in pecial haped medium high reidential building Type of building Name of project Main data Picture of building Medium high rie building Building Society "Dąb" Szczecin, Poland Addre: tr. 26 Kwietnia Three imilar building Each of building have: Number of floor: 9 Number of taircae: 5 Number of flat: 18 Heated pace: 3166 m 3 Number of radiator:79 Number of rier: 97 THE PROJECT The building wa built in 1976 a a o called Leningrad Building coniting of concrete panel. The deign and all the building element were prepared in St. Peterburg in Ruia. The heating ytem deign, a traditional one pipe ytem, originally ued a three way valve with a hut-off function only. The radiator are cat-iron type. The heat upply of the building come from a big ub-tation which i located about 1 meter from the building and alo upplie two other building. Renovation wa tarted in 1994-95 with thermotatic radiator valve intallation (Danfo, RTD-D, type) and ub-tation renovation (weather compenator, control valve and DP controller were intalled). Due to lack of money for hydraulic balance wa done baed on traditional manual method with meauring orifice. In 1996-97 heat cot allocator were intalled which allow meauring individual energy conumption. The next tep of renovation wa done in 22-23: wall iolation (1cm of polytyrene) and new window. Due to till relatively high energy conumption (compared to a traditional two-pipe ytem) in 29 the Building Society wa conidering to change the heating ytem to a two-pipe ytem or ue automatic, adjutable flow limiter on the rier with elf action thermotat (Danfo olution: AB-QM + QT). Invetment for the econd olution wa five time le expenive! RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION A In 1994-95 : Danfo radiator thermotat were intalled DN 15-2 mm ( 483, 37 pc. in each building), type RTD-D B in 29 : Danfo automatic flow limiter with elf action thermotat ued in rier: AB-QM with QT Dimenion: DN 15-2 (57,4 pc. in each building) QT PIBV PIBV QT EXCHANGER FROM HEAT SOURCES Thermotatic Radiator Valve PIBV Preure Independent Balancing Valve (a flow limiter) QT Self Acting Thermotat 22
SAVINGS Invetment type AB-QM + QT Invetment cot [ ] Av. energy aving from three heating eaon [GJ] 3221 1283 Energy price (DH) [ /GJ]* 9,7 Energy uage [GJ] 12 1 8 6 4 2 year (heating eaon) 26/27 27/28 28/29 29/21 Pay back time [year] 2,6 * a AB-QM and QT were intalled in December 29. INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Automatic flow limiter with elf acting thermotat (AB-QM + QT) 291 (91x3) 2763 5238 3221 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year (heating eaon) Energy ued in heating eaon (GJ) Corrected energy ued (degree-day method) (GJ) Average outddor temperature in heating eaon (C) Average energy aving from three heating eaon in GJ Action 26/27 11355,4 11615,8 6,1 27/28 143,5 9697, 3,9 28/29 1795,5 1,8 3,3 29/21 9876,6 9154,8 2,2 1283 AB-QM + QT intallation CONCLUSION Thi new olution, that control the flow in the rier depending on the temperature in the pipe, convert a one-pipe ytem (contant flow ytem) into a variable flow ytem. Unneceary water flow (when are cloed) i reduced to a minimum by elf action balancing valve, which were intalled in each rier. In pite of AB-QM + QT (thermotat operation) it hould be mentioned that AB-QM enure a proper balance between rier. Thi i a huge benefit (proved by thi cae) that due to a correct balance ytem, there were no complaint about cold rier during a very trong winter period 29-1! The propoed olution by Danfo for one pipe heating ytem baed on automatic flow limiter with elf action thermotat (AB-QM + QT) hould be recommended for all region and countrie where the energy cot are high a it allow achieving huge energy conumption reduction with high indoor quality comfort! Short pay back time (le than 3 year) which wa confirmed by thi cae i excellent evidence for thi proper olution offered by Danfo. 23
STRONGLY RECOMMENDED INVESTMENT! 3.3 One-pipe heating ytem in pecial haped medium high building Type of building Name of project Main data Picture of building Medium high rie building Building Society "VIZAFAGÓ 19" Budapet, Hungary Addre: Nepfürdő u. 19 Number of floor: 1 Number of taircae: 6 Number of flat: 26 Heated pace: 4.892 m 3 Number of radiator: 14 Number of rier: 128 THE PROJECT Thi building wa built in 1978 with block of flat technology (concrete panel). The heating ytem i a relatively modern one pipe ytem equipped with by-pa and manual control valve are in front of the radiator. The water ditribution i equipped with manual balancing valve originally. The moderniation had not been completed yet. Only the renovation of water ditribution wa inevitable becaue of many claim. Thi renovation wa finihed in 22 during the ummer maintenance period. RADIATORS RADIATORS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 22) ASV-Q flow limiter (predeceor of AB-QM) wa intalled in all bottom of rier Dimenion: DN 15-25 (26, 68, 34 pc.) PIBV PIBV EXCHANGER FROM HEAT SOURCES PREVIOUS SOLUTION CURRENT SOLUTION Thermotatic Radiator Valve PIBV Preure Independent Balancing Valve (a flow limiter) 24
SAVINGS Invetment type ASV-Q Invetment cot [ ] 153 Av. yearly energy aving [GJ] 1491,5 Energy price (DH) [ /GJ]* 11,99 Pay back time [year],8 Energy uage [GJ] Energy Saving [%] 13 16 12 14 11 12 1 1 9 8 8 6 7 4 6 2 year 21 22 23 24 25 26 27 28 * Thi price i baed on local DH company price INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Flow limiter 128 13173 1857 153 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage (heating) [GJ] Corrected energy uage to 3,59 C Saving in % compared to 21 Average outdoor temp. [ C] Average yearly energy aving (GJ) Action 21 11486 11486 3,6 22 9197 1713 6,7% 4,8 Flow limiter intallation in the bottom of rier 23 11395 156 12,5% 2,5 24 9624 1117 11,9% 4, 25 114 9915 13,7% 3,4 1491,53 26 9619 9889 13,9% 3,8 27 8832 1418 9,3% 4,9 New ub-tation 28 918 159 7,8% 4,7 CONCLUSION The year of invetment i very well viible in the figure above. In 22 the energy aving i approximately half of the coming year becaue of the fact that the intallation wa done in the ummer o the energy aving concern half a eaon only. The energy aving decreaed a bit after 27, due to the implementation of a new individual ub-tation for the building. From thi year on it wa poible to increae the flow temperature to reduce the under heating on the firt floor. With individual flow limiter in the bottom of the rier the water deviation became excellent and we could ave ~11-13% of energy. The new ub-tation helped to increae the level of comfort of flat owner. 25
STRONGLY RECOMMENDED INVESTMENT! 4.1 Dometic hot water ytem in long reidential building Type of building Name of project Main data Picture of building Building Society Wpólny Dom Szczecin, Poland Addre: Zakole 27-36, Szczecin, Poland Number of floor: 5 Number of taircae: 1 Number of flat: 73 Number of rier: 4 Long building THE PROJECT The renovation of thi building tarted in 1996 with a intallation. After that in everal tep the dometic hot water ytem recontruction wa realied in 26. The tendency of the energy aving (in %) i well viible. Originally the water ditribution with circulation rier wa olved with manual balancing valve, therefore overflow and high return temperature wa typical in the ytem. After reno vation the circulation became temperature controlled and energy aving. USED DANFOSS EQUIPMENT FOR RENOVATION (IN 26) A MTCV return temperature limiter baic verion wa intalled in the bottom of all DHW circulation rier Dimenion: DN 2 (4 pc.) HOT WATER SOURCE MTCV MTCV MTCV COLD WATER MTCV Multifunctional Temperature Control Valve 26
SAVINGS Invetment type MTCV Invetment cot [ ] 2353 Energy uage [GJ] Energy Saving [%] Av. yearly energy aving [GJ] 43,1 Energy price (DH) [ /GJ]* 13,2 25 2 15 1 5 year 1999 2 21 22 23 24 25 26 27 28 4 3 2 1-1 -2 Pay back time [year],41 * Thi price i baed on local DH company price INVESTMENT COSTS Equipment Pc. Price [ ] MTCV valve into the circulation rier Intallation cot [ ] Sum 4 2167 187 2353 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage [GJ] Saving in % compared to average of 1999-25 Average yearly energy aving (GJ) Action 1999 192-11,9% 2 1841-7,3% 21 1728 -,7% 22 1658 3,4% More and more owner built in individual water meter 23 1596 7,% 24 1665 3,% 25 163 6,6% 26 1566 8,7% MTCV intallation 27 1436,8 16,3% 28 1134,4 33,9% 43,1 CONCLUSION In the firt year (1999-23) the energy uage decreaed continuouly due to the fact that more and more owner built in an individual water meter in their own flat. The energy aving had tarted. The energy uage became table in the period of 24-26. The intallation of the MTCV return temperature limiter i well viible, the energy aving increaed immediately after the intallation. After one year of experience (27) the et value of return temperature wa reduced for further energy aving. Energy aving ha increaed from 16% to 34%. 27
STRONGLY RECOMMENDED INVESTMENT! 4.2 Dometic hot water ytem in medium long reidential building Type of building Name of project Main data Picture of building Building Society Oiedle Młodych Poznań, Poland Addre: Tyiaclecia 16-42, 26-29, 33-42 Number of floor: 5 Number of taircae: 1 Number of building: 3 Number of rier: 6 Long building THE PROJECT The renovation of thi building tarted in 1994 with a intallation. After intallation of and heat cot allocator, the dometic hot water ytem recontruction wa realied in 23. Originally the water ditribution among circulation rier wa olved with manual balancing valve therefore overflow and high return temperature wa typical in the ytem. After renovation the circulation became temperature controlled. The elaped time clearly how u the energy aving due to renovation. USED DANFOSS EQUIPMENT FOR RENOVATION (IN 23) A MTCV return temperature limiter baic verion wa intalled in all bottom of DHW circulation rier Dimenion: DN 2 (6 pc.) HOT WATER SOURCE MTCV MTCV MTCV COLD WATER MTCV Multifunctional Temperature Control Valve 28
SAVINGS Invetment type MTCV Invetment cot [ ] 4475 Av. yearly energy aving [GJ] 92,3 Energy price (DH) [ /GJ] 7,77 Pay back time [year],63 Energy uage [GJ] Energy Saving [%] 4 5 45 4 35 3 25 2 15 1 5 year 1998 1999 2 21 22 23 24 25 26 27 28 35 3 25 2 15 1 5 Calculation: period 1998-22 compared to period 23 INVESTMENT COSTS Equipment Pc. Price [ ] MTCV valve into the circulation rier Intallation cot [ ] Sum 6 3251 1224 4475 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage [GJ] Saving in % compared to average of 1998-22 Average yearly energy avig (GJ) Action 1998 4142 1999 467 2 4689 21 3979 22 3593 23 3788 13,% MTCV intallation 24 3554 18,4% 25 3342 23,2% 26 2833 34,9% 92,3 27 3456 2,6% 28 3223 26,% CONCLUSION In the firt year (1998-2) the energy uage increaed than decreaed continuouly due to the fact that more and more owner built in an individual water meter in their own flat. The energy aving had tarted. The energy uage more or le tabilied in the period of 22-23. The intallation of the MTCV return temperature limiter i well viible, the energy aving increaed immediately after the intallation. After two year of experience (26) the et value of return temperature wa reduced for further energy aving. Energy aving ha increaed from 18% to 35%. 29
STRONGLY RECOMMENDED INVESTMENT! 4.3 Dometic hot water ytem in high reidential building Type of building Name of project Main data Picture of building Building Society Oiedle Młodych Poznań, Poland Addre: Tyiąclecia 7 Number of floor: 16 Number of taircae: 2 Number of flat: 128 Number of rier: 15 High building THE PROJECT In 1994 the building wa renovated with a intallation. After that in everal tep the dometic hot water ytem recontruction wa realied in 23. Originally the water ditribution among circulation rier wa olved with manual balancing valve therefore overflow and high return temperature wa typical in the ytem. After renovation the circulation became temperature controlled. The elaped time clearly how u the energy aving due to renovation. USED DANFOSS EQUIPMENT FOR RENOVATION (IN 23) A MTCV return temperature limiter baic verion wa intalled in all bottom of DHW circulation rier Dimenion: DN 2 (15 pc.) HOT WATER SOURCE MTCV MTCV MTCV COLD WATER MTCV Multifunctional Temperature Control Valve 3
SAVINGS Invetment type MTCV Invetment cot [ ] 1119 Energy uage [GJ] Energy Saving [%] Av. yearly energy aving [GJ] 292,4 Energy price (DH) [ /GJ] 8,79 25 2 15 1 5 year 1998 1999 2 21 22 23 24 25 26 27 28 4 3 2 1-1 Pay back time [year],44 Calculation: period 1998-22 compared to period 24-28 INVESTMENT COSTS Equipment Pc. Price [ ] MTCV valve into the circulation rier Intallation cot [ ] Sum 15 813 36 1119 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage for DHW [GJ] Saving in % compared to average of 1998-22 Average yearly energy aving (GJ) Action 1998 1915 -,3% 1999 235-6,6% 2 1855 2,8% 21 1956-2,4% 22 1785 6,5% 23 1416 25,8% MTCV intallation 24 1722 9,8% 25 189 5,3% 26 1568 17,9% 292,4 27 1746 8,6% 28 144 24,6% CONCLUSION In the year (1998-22) the energy uage wa varying in a narrow range, but we can ee that the average conumption wa on a high level. The year of the intallation of the MTCV return temperature limiter i well viible (23). The energy aving ha increaed uddenly. From thi year on the energy uage i till fluctuating (mot probably baed on hot water uage behaviour) but on a ignificantly lower level. The average yearly energy aving i not viible but cloe to a 3 GJ. In thee type of high building where the ditribution pipeline i not very long, the energy aving potential i maller (although thi effect i compenated by lenght of vertical pipeline) but in the ame time the invetment cot are limited. All in all we achieved a pay back time of le than 6 month. Thi i an excellent achievement! 31
STRONGLY RECOMMENDED INVESTMENT! 5.1 Cooling ytem comparion in pecial haped office building Type of building Name of project Main data Picture of building pecial haped office building Office center "V Parku" Prague, Czech Republic Addre: Prague-Chodov, Number of terminal unit: 35 Heated pace: 31376 m 3 Number of floor: 4 Type of balancing: Building 1): Manual balancing and MCV at TU Building 2): at all TU THE PROJECT The Office Park project tarted in 24. The firt ix building were built with traditional contant flow heating/cooling ytem technology. Thi mean that the fan-coil are controlled by a 3-way motoried control valve with ON/OFF control and the AHU -1V modulation control. The water deviation wa enured with manual balancing valve. The ytem commiioning ha been done by an independent company. In 27 Danfo offered new technology and the invetor had made the deciion that the remaining 12 building were equipped with AB- QM valve. The energy efficiency of different heating/cooling ytem can be compared eaily, becaue the phyical condition and the uage of the building are imilar. RC RC FAN COIL UNITS (FCU) RC CHILLED PANELS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 27) A AB-QM preure independent balancing motoried flow limiter for fan-coil Dimenion: DN 15-25 (3 pc.) AHU BMS B AB-QM preure independent balancing control valve for air handling unit Dimenion: DN 4-65 (5 pc.) CHILLER VSD Preure Independent Balancing Control Valve RC Room Controller BMS Building Management Sytem VSD Variable Speed Drive 32
SAVINGS Invetment type Traditional AB-QM renovation AB-QM invetment Invetment cot [ ] 24582 Av. yearly energy aving [GJ] - Energy price (DH) [ /GJ] 9,12 27937 48924 9,12 3355 48924 9,12 Energy uage [GJ] Energy Saving [%] 3 25 2 15 1 5 year April May June July Augut September 6 5 4 3 2 1 Pay back time [year] 5,2,6 Traditional control AB-QM control Saving in % * Thi price i baed on local DH company price INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Traditional control in front of terminal unit 35 22292 229 24582 and MBV AB-QM in front of terminal 35 26372 1565 27937 USAGE AND ENERGY SAVING OF BUILDING IN 27 SUMMER Year 27 Energy uage (cooling) Energy uage (cooling) with traditional control [GJ] with AB-QM control [GJ] Saving in % April 16 585 9 487 42,8% May 21 569 1 424 51,7% June 28 353 14 526 48,8% July 26 9 2 366 21,7% Augut 25 396 19 191 24,4% September 12 67 7 61 39,7% Sum 13 519 81 595 38,2% CONCLUSION The figure above how that with the uage of AB-QM flow limiter/controller we can ave cloe to 4% of energy on an average level compared to a traditional contant flow ytem. From an invetment point of view the intallation cot difference between a traditional and an AB-QM ytem i inignificant (13%), the pay back time i,6 year. In cae of renovation with the replacement of the original valve we can t expect uch good pay back time. The pay back time in thi project i 5,2 year. Particularly if we take into conideration the better comfort with AB-QM valve. Thi i a good invetment. 33
STRONGLY RECOMMENDED INVESTMENT! 5.2 Cooling and heating ytem in medium high office building Type of building Name of project Main data Picture of building pecial haped medium high building Office center "Bakat Center" Budapet, Hungary Addre: Ráday u. 51 Type of ytem: four pipe heating / cooling ytem Number of terminal unit: 112 pc., 56 pc. in heating and 56 pc. cooling Heated/cooled pace: 431 m 3 Number of floor: 7 Type of balancing: Originally: Manual balancing and zone valve at FC Recontruction: at FC THE PROJECT The Office building wa built in 22. The heatingcooling ytem i a four pipe variable flow ytem. The terminal unit i equipped with ON/OFF control by room thermotat via thermo hydraulic actuator. The hydraulic balancing wa olved with manual valve. Due to high energy bill and unatified uer the owner of the building ha done a tudy regarding renovation poibilitie in 27. The tudy pointed out that the reaon of problem came from inufficient balancing mainly. Conequently the owner decided that they change the manual balancing valve to automatic flow limiter (AB-QM). In thi project the thermal actuator remain the original becaue they fit to AB-QM valve with adapter. The AHU ytem wa not renovated either. The intallation of new valve wa done in 28. RC RC FAN COIL UNITS (FCU) RC CHILLED PANELS USED DANFOSS EQUIPMENT FOR RENOVATION (IN 28) A AB-QM preure independent balancing motoried flow limiter for fan-coil Dimenion: DN 1-2 (56-56 pc.) AHU BMS CHILLER VSD Preure Independent Balancing Control Valve (a a flow limiter) RC Room Controller BMS Building Management Sytem VSD Variable Speed Drive 34
SAVINGS Invetment type AB-QM renovation Heating* Cooling Invetment cot [ ] 3933 5199 Av. yearly energy aving [GJ] / [kwh] 183,8 4858 Energy price (gaz) [ /GJ] / [ /kwh] 5,53,184 Pay back time [year] 3,9,7 Energy uage Heating [GJ] 12 1 8 6 4 2 year 27 28 29 Energy uage Cooling [kwh] 25 2 15 1 5 year 27 28 29 *The real pay back time of heating i better due to the renovation in 28 INVESTMENT COSTS Equipment Pc. Price [ ] AB-QM valve for heating AB-QM valve for cooling Intallation cot [ ] Sum 56 3411 522 3933 56 4639 56 5199 USAGE AND ENERGY SAVING OF BUILDING Year Energy uage Energy uage Heating [GJ] Energy uage Cooling [kwh] Action Corrected energy uage to 4,87 C Average outdoor temp. [ C] Average yearly energy aving [GJ] Energy uage Average yearly energy aving [kwh] 27 112, 112, 4,9 211 429 28 115, 176,2 4,7 43,8 193 545 17 884 AB-QM intallation 29 93, 796,1 3,9 323,9 147 598 63 831 Average 183,8 4 858 * The energy uage of heating contain all ga baed energy conumption including dometic hot water. Due to the above mentioned period the water ditribution ytem wa modernied only, reulting in energy aving. ** The energy uage of cooling contain all electricity conumption including lightning, lift etc. Due to the above mentioned period the water ditribution ytem wa modernied only, reulting in energy aving. CONCLUSION The figure above how that we can ave a ignificant amount of energy with uage of AB-QM balancing/control valve compared to traditional (manual balancing) control method. We can not tell the energy aving in percentage but the average yearly energy aving i well viible. It i more than 2 GJ in heating ytem baed on ga uage reduction and 4 thouand kwh in cooling ytem baed on electricity conumption reduction. From an invetment point of view the intallation cot i not high only the AB-QM valve itelf and intallation ha cot money. The pay back time i acceptable 3,9 year in heating and excellent in cooling,7 year furthermore we can enure much better comfort for uer. Since implementation of AB-QM valve we did not face any claim problem due to bad water ditribution. 35
STRONGLY RECOMMENDED INVESTMENT! 5.3 AHU pumping cot comparion in commercial building (cooling application) FAN COIL UNITS (FCU) Type of building Name of project Main data Picture of building pecial haped middle high building Tampine Mall Singapore Addre: Tampine Central 3 way 5 MCV 3 way MCV 3 way MCV Air Handling PIBV Unit application: PIBV PIBV Meaurement 1): AHU i equipped with traditional control element (manual balancing CHILLED PANELS valve and MCV) a a contant flow ytem Meaurement 2): PIBV AHU i equipped with PIBV PIBV a a variable flow ytem 3 way MCV 3 way MCV 3 way MCV THE PROJECT The elected building i a hopping mall. The main purpoe of meaurement i to prove the energy efficiency of control in variable flow ytem to be compared with traditional control in contant flow ytem (typical application). In the firt tep we have meaured a elected AHU namely the flow and return temperature furthermore the blow in and room temperature. We have done the ame meaurement on the ame AHU after renovation (intallation of AB-QM valve). The AHU control wa arranged by -1V proportional controller. For meaurement we have choen equal circumtance like uage of pace and external weather condition. RC PIBV 3 way MCV RC 3 way MCV RC AHU CHILLER FAN COIL UNITS (FCU) PIBV CHILLED PANELS USED DANFOSS EQUIPMENT FOR NEW BUILDING (IN YEAR 28) A AB-QM preure independent balancing control valve for air handling unit Dimenion: DN 5 (1 pc.) The calculation on the following page refer to AHU only MCV Motoried Control Valve PIBV Preure Independent Balancing Valve (a a flow limiter) AHU Air Handling Unit AHU BMS CHILLER VSD Preure Independent Balancing Control Valve AHU Air Handling Unit 36
SAVINGS Invetment type Traditional Invetment cot [ ] Yearly circulation cot [kwh/ahu]* 7.296 Av. yearly energy aving [GJ] / [kwh] Energy price (gaz) [ /GJ] / [ /kwh],84 AB-QM renovation 1127 3.356 3.94,84 12 1 8 6 4 2 Flow [%] Heat tranfer [%] 5 1 15 2 25 3 Traditional valve AB-QM Pay back time [year] 3,4 * Length of eaon: 33 day, working hour: 16 hour/day INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum AB-QM intallation 1 14 123 1127 CIRCULATED FLOW CALCULATION BASED ON COOLING CAPACITY AND TEMPERATURE DROP ON AHU IN DIFFERENT APPLICATIONS Flow [l/h] 6 5 4 3 2 1 Cooling capacity [W] 75 77 79 81 83 85 87 89 LMTD [K] 2 2,5 3 3,5 4 4,5 5 5,5 6 6,5 7 7,5 8 Flow [l/h] 6 5 4 3 2 1 Traditional valve. Average: Flow = 35. l/h, Cc = 87. W AB-QM. Average: Flow = 16. l/h, Cc = 79. W Traditional valve. Average: Flow = 35. l/h, ΔT = 2,6 K AB-QM. Average: Flow = 16. l/h, ΔT = 5 K CONCLUSION From the diagram above i well viible that the contant flow ytem require continuou nominal flow independent of the real demand. In cae of uage of AB-QM the expected eaonal average flow i le than half of the nominal flow. Thi bring u ignificant energy aving potential. The pumping power demand i 54% le. With other word we can ay that the cot of circulation i 46% compared to traditional olution. From an invetment point of view the pay back time give the opportunity to make a deciion. It i in our cae 3,4 year, thi reult in a very good invetment. Particularly if we take into conideration the increaing energy efficiency of chiller and increaed comfort with AB-QM valve. 37
STRONGLY RECOMMENDED LONG TERM INVESTMENT! 6.1 Energy aving in macro cale Type of building Name of project Main data Picture of building a lot of different building Building Society Wpólny Dom, Szczecin, Poland Number of building: 149 multifamily and 199 ingle family houe 61 pc. high 12 torie building 88 pc. mall 5 torie building Number of flat: 12. Heated urface: 6. m 2 Number of tenant: 31. SYSTEM DESCRIPTION BEFORE RENOVATION: Original wall contruction and traditional window are ued according temporarily tandard Heating: two-pipe heating ytem with manual valve and hand wheel on radiator furthermore manual balancing valve in rier. Temperature regime 9/7 C, upplied from ditrict heating ub-tation. Dometic hot water (DHW) (9% of building i equipped): circulation pipeline with manual water ditribution. The et temperature i 55 C. SYSTEM DESCRIPTION AFTER RENOVATION: Thermal inulation of wall, roof and baement according new norm All radiator equipped with thermotatic radiator valve and heat cot allocator The hydraulic balancing i optimied by automatic (preure differential) rier controller The DHW circulation ytem wa modernied with a thermal balancing valve. THE PROJECT 93% of the building were built before 1992. The moderniation of the building tarted in 1995 and wa finalied in 25. During thi 1 year period, 418.52 m 2 wall and half of the building roof urface wa inulated and 1.7 window were exchanged. In the ame time the heating and DHW ytem were modernied with, automatic balancing valve in heating pipeline and thermal balancing valve in the DHW circulation. To ave energy for the tenant, individual radiator were equipped with heat cot allocator. Thi project included moderniation of 128 ub-tation, alo plit of 3 big central ub-tation into 15 maller one and exchanged weather compenator. The moderniation wa performed ucceively building by building: financial reource allowed executing moderniation of 8 to 14 building every year, including all element mentioned above. The moderniation program reulted in a reduced power order for the building ociety from their Ditrict Heating Company: reduction of 43% for their heating ytem. From 51 MW in 1995 to 29 MW in 25. reduction of 72% for their water ytem. From 28 MW in 1995 to 8 MW in 25. Thee aving alo influence the total energy expene, ince the Ditrict Heating Company charge to end-uer. A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 1-15-2 (37. pc.) B Differential preure controller pair in the bottom of the heating rier: ASV-PV + ASV-M Dimenion: DN 15-32 (9.3 pc. Danfo and 53 other) C MTCV return temperature limiter baic verion wa intalled in all bottom of DHW circulation rier Dimenion: DN 15-2 (3. pc.) 38
SAVINGS Heating [GJ] Hot water [GJ] Heating [MW] Hot water [MW] Energy conumption in 1995 436778 Energy conumption in 25 18586 259842 124499 Power order in 1995 Power order in 25 51 28 29 8 ESTIMATED PAY BACK TIME FOR ALL INVESTMENTS 3,8 YEARS Reduction [%] 59% 52% 43% 72% "Power order" from Ditrict Heating Company in MW for heating and hot water Energy conumption for heating and hot water ytem Ordered power [MW] 6 4 2 1 year Energy conumption [GJ] 1995 1996 1997 1998 1999 2 21 22 23 24 25 26 27 28 29 5 45 4 35 3 25 2 15 1 1995 1996 1997 1998 1999 2 21 22 23 24 25 26 27 28 29 year Heating Hot water Heating Hot water Energy price in Poland in EU/GJ 18 16 14 12 1 8 6 4 2 year 1998 1999 2 21 22 23 24 25 26 27 28 29 Energy price CONCLUSION All Building Society expene for the heating ytem were reduced from 12.415.487 PLN in 1998 to 1.625.818 PLN in 25. today Building Society pay 15% le than in 1998, depite of the fact that energy price increaed in thi period with 52%. All Building Society expene for the hot water ytem wa reduced from 6.629.81 PLN in 1998 to 4.944.74 PLN in 25. today Building Society pay 24% le than in 1998, depite of the fact that the energy price increaed in thi period with 52% With a reliable and competent upplier like Danfo excellent reult of aving energy, and thu money, can be achieved. The etimated pay back time for all thee invetment i 3,8 year. 39
STRONGLY RECOMMENDED LONG TERM INVESTMENT! 6.2 Energy aving in macro cale Type of building Name of project Main data Picture of building a lot of differnt building Building Society Oiedle Młodych, Poznań, Poland Number of building: 29 building 37 pc. 16 torie building 35 pc. 12 torie building 218 pc. 5 torie building Number of flat: 3 957 Heated urface: 1 683 214 m 2 Number of tenant: 9. SYSTEM DESCRIPTION BEFORE RENOVATION Original wall contruction and traditional window are ued according temporarily tandard. Heating: two-pipe heating ytem with manual valve and hand wheel on radiator furthermore manual balancing valve in rier. Temperature regime 9/7 C, upplied from ditrict heating ub-tation. Dometic hot water (DHW) (9% of building i equipped): circulation pipeline with manual water ditribution. The et temperature i 55 C. SYSTEM DESCRIPTION AFTER RENOVATION Thermal inulation of wall, roof and baement according new norm. All radiator equipped with thermotatic radiator valve and heat cot allocator. The hydraulic balancing i optimied by automatic (preure differential) rier controller. The DHW circulation ytem wa modernied with a thermal balancing valve. THE PROJECT Oiedle Młodych Houing Cooperative (HC) in Poznan wa founded in 1958. The Cooperative ha tarted erecting reidential building in the Rataje ditrict in 1966. Before 1994 all building in the Rataje ditrict (excluding Stare Żegrze and Polan Houing Etate) were built from pre-fabricated element produced by the local Rataje plant. In 1983 1991 Stare Żegrze and Polan Houing Etate building were contructed from the pre-cat concrete lab Szczecin technology. More than 6% of the building were erected in the time when the thermal conductivity for wall wa equal to 1,16 W/m 2, and that for flat roof,87 W/m 2. Today inulation material for wall and flat roof are deigned with a thermal conductivity below,25 W/m 2. The firt thermo-moderniation work wa carried out in 1987-1995 and included: Inulation of external wall, within the framework of the technological hortcoming elimination program. During the firt year of thi program it wa financed by the State by credit remittal and then later by ubidie. At the ame time 33 in-houe heating ditribution centre were equipped with meter. Alo hot water upply ub-meter, to divide heating energy cot for central heating and hot water upply, were intalled. Thee moderation were mainly financed out of ubidie. Intallation of flat water meter wa performed intenively at the ame time. The econd tep of moderniation of the building tarted in 1996 and wa finalied in 25. In thi 1 year period 76 m 2 wall and half of the building roof urface wa inulated and 65 window were exchanged. In the ame time the heating and DHW ytem wa modernied with, automatic balancing valve in the heating pipeline and a thermal balancing valve in DHW circulation. For motivation of tenant energy aving the radiator were equipped with heat cot allocator. Thi project included moderniation of 33 ub-tation alo weather compenator and heat meter. The moderniation wa performed building by building. By the end of 27 the Cooperative intalled more than 84. individual flat water meter (for hot and cold water). A Thermotatic radiator valve for each radiator were intalled. Danfo: RTD-N + thermo head RTD Dimenion: DN 1-15-2 (12. pc.) B Differential preure controller pair in the bottom of the heating rier: ASV-PV + ASV-M Dimenion: DN 15-32 (7. c. Danfo) C MTCV return temperature limiter baic verion wa intalled in all bottom of DHW circulation rier Dimenion: DN 15-2 (4. pc.) 4
SAVINGS Heating [GJ] Heating & Hot water [MW] Energy conumption in 1998 746,1 Energy conumption in 27 56,9 Order power in 1997 Order power in 28 2,7 119 ENERGY USAGE FOR HOT WATER SYSTEM IN THAT TIME WAS REDUCED WITH 49% Reduction [%] 32% 41% ENERGY USAGE AND ENERGY SAVING OF BUILDINGS [GJ] Heat conumption for central ytem, in thouand GJ Decreae about 32% from 1998 to 27 [MW] Energy ued for Central Heating and Hot Water Supply in 1997-28, MW. Decreae by about 4% 8 7 6 5 4 3 year 25 2 15 1 5 1998 1999 2 21 22 23 24 25 26 27 1998 1997 1999 2 21 22 23 24 25 26 27 28 Heat conumption for central ytem, in thouand GJ Decreae about 32% from 1998 to 27. Conumption year Energy ued for Central Heating and Hot Water Supply in 1997-28, MW. Decreae by about 4%. Energy MW [GJ] 9 8 7 6 5 4 year Energy price EU/GJ (bruto) 1997 1998 1999 2 21 22 23 24 25 26 28 Energy Price CONCLUSION With a reliable and competent upplier like Danfo excellent reult of aving energy, and thu money, can be achieved. The calculation how that with 1,66 mln m 2 of the HC heated area and no invetment of thermo-moderniation the annual central heating cot could be 42,4mln PLN baed on government price in 1997. The ubidie would then cover the difference with real cot. Conidering a 5% increae in heating energy cot and the ame rie of tenant payment, the annual central heating cot could be 63,6mln PLN in 28. The real annual central heating cot, conidering the current price and heat conumption at the previou year, i only about 29,5 mln PLN. Thu the above 33 mln PLN aving of the central heating cot reulted from the change in heating energy ytem and conducted thermomoderniation work. 41
STRONGLY RECOMMENDED INVESTMENT! 6.3 Energy aving in macro cale Type of building Name of project Main data Picture of building a lot of different building high building Thermomoderniation of Waraw Houing Cooperative (WHC), Waraw Number of building: 397 multifamily building Including tall building 4% 12 torie and 6% of 5 torie building. Number of flat: 26374 flat Heated urface: 1.197. m 2 Number of tenant: 1. SYSTEM DESCRIPTION BEFORE RENOVATION Original wall contruction and traditional window are ued according temporarily tandard. Heating: two-pipe heating ytem with manual valve and hand wheel on radiator furthermore manual balancing valve in rier. Temperature regime 9/7 C, upplied from ditrict heating ub-tation. Dometic hot water (DHW)(9% of building i equipped): circulation pipeline with manual water ditribution. The et temperature i 55 C. SYSTEM DESCRIPTION RENOVATION Thermal inulation of wall, roof and baement according new norm All radiator equipped with thermotatic radiator valve and heat cot allocator The hydraulic balancing i optimied by automatic (preure differential) rier controller The DHW circulation ytem wa modernied with a thermal balancing valve. THE PROJECT Waraw Houing Cooperative (WHC) wa founded on December 11, 1921 From 1996 intallation of Danfo valve and thermotatic enor have been ucceively tarted. Heat meter and heat cot allocator were intalled to charge tenant individually. In 1999 thermo-moderniation proce of WHC aet, including houe inulation, replacement of window, inulation of attic roof a well a moderniation or changing of central heating and hot water upply ytem, ha been tarted. Until 27 around 1 balancing valve and thermotatic enor, 3 ASV-I/ASV-PV balancing valve, 6 USV-I/USV-M valve and around 15 MTCV valve were intalled on hot water upply ytem. By 27 thermo-moderniation of 333 houe, built before 1995, wa finihed. In 23-27 25 houe in total were modernied. The cot are etimated to be 1.. PLN (25 Million Euro). The cope of the thermo-moderniation procee in WHC i: intallation of two-pipe central heating ytem in houe, intallation of balancing valve and thermotatic enor, intallation of heat cot allocator, moderniation of local heating ditribution ytem SPEC (Enterprie of Heating Energy in Waraw), inulation of external wall by polytyrene heet of 1 cm thickne, roof inulation, intallation of balancing valve on hot water and central heating rier, changing of window on taircae and in baement, inulation moderation were performed imultaneouly with central heating ytem moderniation. USED DANFOSS EQUIPMENT FOR HEATING AND DHW RENOVATION (1996-25 CONTINUOUSLY) A Thermotatic radiator valve for each radiator: RTD-N + thermo head RTD Dimenion: DN 1-15-2 (1. pc.) B Differential preure controller pair in the bottom of the heating rier: USV-I/M and ASV-PV and ASV-I Dimenion: DN 15-32 (9 pc. Danfo) C MTCV return temperature limiter baic verion wa intalled in all bottom of DHW circulation rier Dimenion: DN 15-2 (1.5 pc.) 42
SAVINGS Heating [GJ] Hot water [GJ] Energy conumption in 2 61455,4 Energy conumption in 29 326746 25422 168766 HEATING COSTS DECREASED AROUND 22% ENERGY PRICES INCREASED 18% Reduction [%] 46% 34% Baed on given fact we can ee the following reult: Heating cot decreaed by around 22%, while price increaed by 18% and total area of WHC wa extended by 78 m 2. In 27 WHC paid 8.755.28 PLN le for heating energy than in 23 ENERGY USAGE AND ENERGY SAVING OF BUILDINGS [GJ] 6 5 4 3 2 1 year Energy conumption for heating [GJ] [GJ] Energy conumption for hot water [GJ] 4 35 3 25 2 15 2 21 22 23 24 25 26 27 28 29 year 2 21 22 23 24 25 26 27 28 29 heating hot water Heating energy cot in WHC in 22-27 in million PLN (1 million PLN app. 25 th Euro) 45 4 35 3 25 2 15 1 5 year 22 23 24 25 26 27 CONCLUSION Due to thermo-moderniation action in the year 22-27, total cot of heating energy upply were cut by 2% from 41 to 33 PLN. Thermo-moderniation credit enabled to carry out ytematic improvement and the financial burden wa not put on tenant. Tenant did not bear any financial rik at the moment of WHC credit application bank had credit guarantee in the form of WHC bank account and income from non-reidential area renting. Money, aved due to lower heating cot, wa ued to pay the credit. Except for financial apect, heating comfort a well a appearance of the houe wa improved. With a reliable and competent upplier like Danfo excellent reult of aving energy, and thu money, can be achieved. Total Central Heating Hot water 43
Location: Shanghai, China Project: World Expo Performance Centre Application: AB-QM for Heating and Cooling Location: Gdynia, Poland Project: Sea Tower Application: AB-QM for Heating and Cooling Location: Frankfurt, Germany Project: Deutche Bank Application: AB-QM for Heating and Cooling Location: Frankfurt, Germany Project: Tower 185 Application: AB-QM for Heating and Cooling Location: Bangalore, India Project: Hotel Gardenia Application: AB-QM for Heating and Cooling Danfo A/S. Heating Solution. Hydronic Balancing & Control. Ulvehavevej 61. DK-71 Vejle. Denmark. Telephone +45 7488 85. E-mail: heating@danfo.com. www.hbc.danfo.com VZ.A6.E3.2_Sep214