Energy Saving Solutions for renovation of heating and cooling systems

Transcription

1 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.

2 Structure.1 Introduction Recommended olution for heating ytem Recommended olution for cooling ytem Two-pipe heating ytem in long reidential building Two-pipe heating ytem in medium high reidential building Two-pipe heating ytem in medium high reidential building Two-pipe heating ytem in high reidential building Two-pipe heating ytem in medium high reidential building Two-pipe heating ytem in imilar reidential building One-pipe heating ytem in pecial haped medium high reidential building One-pipe heating ytem in pecial haped medium high reidential building One-pipe heating ytem in pecial haped medium high reidential building Dometic hot water ytem in long reidential building Dometic hot water ytem in long reidential building Dometic hot water ytem in high reidential building Cooling ytem comparion in pecial haped office building Cooling and heating ytem in medium high office building AHU pumping cot comparion in commercial building (cooling application) Energy aving in macro cale Energy aving in macro cale Energy aving in macro cale 42 2

3 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

4 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

5 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

6 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

7 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

8 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: 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 (1, 5, 1, 5 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 8

9 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 [%] year Calculation i baed on year 21 compared to INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Dp controller into the rier 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] , ,5% 4,8 Average energy aving [GJ] ,6% 16,7% 4,8 ASV intallation ,1% 31,7% 4, ,5% 31,% 5, ,% 38,2% 4,5 Roof inulation 383, ,3% 4,7% 4, ,% 2,4% 6, ,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

10 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 (26 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 1

11 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 [%] year 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 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 Average outdoor temp. [ C] Average yearly energy aving (GJ) ,% 5,1 intallation in ,3% 6, ,7% 4, ,1% 4, ,3% 3,74 HCA* intallation ,3% 5,13 Wall and roof inulation ,% 5,63 ASV intallation ,% 29,8% 3, ,3% 18,1% 6,2 * HCA Heat Cot Allocator ,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

12 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 Number of floor: 5 Number of taircae: 1 Number of flat: 73 Heated pace: 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 (14 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 12

13 SAVINGS Invetment type ASV-PV/M Invetment cot [ ] 1674 Av. yearly energy aving [GJ] 25, Energy price (DH) [ /GJ]* 13,2 Energy uage [GJ] year Energy Saving [%] 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 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 Average outdoor temp. [ C] Average yearly energy aving (GJ) ,% 5,1 part of wall inulation* ,8% 6, ,9% 4, ,2% 4, ,% 3,74 HCA** intallation ,3% 5,13 roof inulation ,2% 5,63 ASV intallation ,7% 18,7% 3, ,3% 6,7% 6,2 25, remaining wall inulation ,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

14 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 (2, 4, 14, 2 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 14

15 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 [%] year Pay back time [year] 1, Calculation i baed on period compared to INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Dp controller into the rier 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 , ,5% 6,2 1995, 1996 HCA intallation ,5% 4,4 Inulation of building ,2% 5, ,5% 3, ,3% 3, ,7% 2, ,5% 3, ,5% 9,8% 4,4 ASV intallation ,5% 3,8% 2, ,5% 19,6% 5, ,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

16 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: 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 (4, 3, 4, 3 pc.) FROM HEAT SOURCES Thermotatic Radiator Valve ABPC Automatic Balancing Preure Controller 16

17 SAVINGS Invetment type only ABV in S.St.** ASV-P/M Sum Invetment cot [ ] 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 [%] year 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) Heat cot allocator Central Dp controller Dp controller into the rier (ASV-PV, ASV-M) 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] ,4 Energy aving in GJ comp. to previou period* ,7% 2,1, HCA intallation ,9% 3, ,9% 2, ,7% 3, ,8% 5,6 p contr. in ub-tation ,4% 23,3% 3,7 476, ,3% 23,3% 3,7 ASV intallation ,6% 28,3% 6,6% 2, ,5% 29,4% 8,% 3, ,% 35,9% 16,5% 3,7 Sub-tation eparation ,6% 46,2% 2, ,% 44,2% 5, ,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

18 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

19 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: =616 EUR (baed on price difference of balancing.) INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Remark Dp controller into the rier Nazora 12 Manual balancing Nazora 6 Radiator valve In both building Heat cot allocator 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

20 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

21 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 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) 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 difference in MWh 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

22 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 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 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 : 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

23 SAVINGS Invetment type AB-QM + QT Invetment cot [ ] Av. energy aving from three heating eaon [GJ] Energy price (DH) [ /GJ]* 9,7 Energy uage [GJ] 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) 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/ , ,8 6,1 27/28 143,5 9697, 3,9 28/ ,5 1,8 3,3 29/ ,6 9154,8 2, 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

24 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: 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 (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

25 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 [%] year * Thi price i baed on local DH company price INVESTMENT COSTS Equipment Pc. Price [ ] Intallation cot [ ] Sum Flow limiter 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 , ,7% 4,8 Flow limiter intallation in the bottom of rier ,5% 2, ,9% 4, ,7% 3,4 1491, ,9% 3, ,3% 4,9 New ub-tation ,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

26 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

27 SAVINGS Invetment type MTCV Invetment cot [ ] 2353 Energy uage [GJ] Energy Saving [%] Av. yearly energy aving [GJ] 43,1 Energy price (DH) [ /GJ]* 13, year 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 ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage [GJ] Saving in % compared to average of Average yearly energy aving (GJ) Action ,9% ,3% ,7% ,4% More and more owner built in individual water meter ,% ,% ,6% ,7% MTCV intallation ,8 16,3% ,4 33,9% 43,1 CONCLUSION In the firt year ( ) 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 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

28 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, 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

29 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 [%] year Calculation: period compared to period 23 INVESTMENT COSTS Equipment Pc. Price [ ] MTCV valve into the circulation rier Intallation cot [ ] Sum ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage [GJ] Saving in % compared to average of Average yearly energy avig (GJ) Action ,% MTCV intallation ,4% ,2% ,9% 92, ,6% ,% 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 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

30 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

31 SAVINGS Invetment type MTCV Invetment cot [ ] 1119 Energy uage [GJ] Energy Saving [%] Av. yearly energy aving [GJ] 292,4 Energy price (DH) [ /GJ] 8, year Pay back time [year],44 Calculation: period compared to period INVESTMENT COSTS Equipment Pc. Price [ ] MTCV valve into the circulation rier Intallation cot [ ] Sum ENERGY USAGE AND ENERGY SAVING OF BUILDING Year Energy uage for DHW [GJ] Saving in % compared to average of Average yearly energy aving (GJ) Action ,3% ,6% ,8% ,4% ,5% ,8% MTCV intallation ,8% ,3% ,9% 292, ,6% ,6% CONCLUSION In the year ( ) 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

32 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: 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 (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

33 SAVINGS Invetment type Traditional AB-QM renovation AB-QM invetment Invetment cot [ ] Av. yearly energy aving [GJ] - Energy price (DH) [ /GJ] 9, , ,12 Energy uage [GJ] Energy Saving [%] year April May June July Augut September 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 and MBV AB-QM in front of terminal 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 ,8% May ,7% June ,8% July ,7% Augut ,4% September ,7% Sum ,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

34 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

35 SAVINGS Invetment type AB-QM renovation Heating* Cooling Invetment cot [ ] Av. yearly energy aving [GJ] / [kwh] 183, Energy price (gaz) [ /GJ] / [ /kwh] 5,53,184 Pay back time [year] 3,9,7 Energy uage Heating [GJ] year Energy uage Cooling [kwh] year *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 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] , 112, 4, , 176,2 4,7 43, AB-QM intallation 29 93, 796,1 3,9 323, Average 183, * 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

36 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