CHAPTER 8 Mandatory energy audit
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1 Technical CHAPTER 8 Mandatory 8.1 Guideline! "# $% % "' ( * (
2 Technical 8.2 : 8.3 Technical Guidance: Energy demand and Consumption +, # $!!. /
3 Technical Table 8.3.1: Building energy consumption Monthly Energy Consumption Pattern Building Energy Consumption Sanctioned demand Cost Month kwh KVA PF kw Energy Charges Demand Charges Total Cost January February March April May June July August September October November December.!# ! KVA #2 "#(!2 # ! 7! 5 "2! 5 "#"#!
4 Technical Table 8.3.2: EPI Comparison Parameter Energy Performance Index EPI Comparison Actual EPI (kwh/annum/m 2 BEE recommended EPI (kwh/annum/m 2 Climatic Zone Temperate Normalized EPI Bandwidth (kwh/sqm/year Star Rating Star Star Star Star Below Star Average Annual Hourly EPI AAh EPI (Wh/hr/Sqm Star Rating Star Star Star Star Below 20 5 Star 2"' -2 8!# ( 96" : Step 4- Energy Conservation Measures ;-4+6 "#
5 Technical Audit of individual systems Electrical system # Table 8.3.3: Transformer rated parameters Transformer rated details Parameters Make Rated KVA High side Voltage Low Side Voltage Type of Cooling Frequency Year of Manufacturing Transformer Table 8.3.4: Motor rated parameters Motor Rated details Motor Description Voltage Current Power factor Actual KW Chilled water pump -1 Chilled water pump -2 Condenser water pump -1 Condenser water pump -3 CT Fan -1 CT Fan -2 AHU Motors and others 85<=! --, =!=
6 Technical (- #(- ".(- ( Table 8.3.5: Motor measured parameters Motor Percentage Loading Rated Motor Description Actual KW KW Chilled water pump -1 Chilled water pump -2 Condenser water pump -1 Condenser water pump -3 CT Fan 1 CT Fan 2 AHU Motors Percentage loading (% <!< (- #(- ".(- ( =! Table 8.3.6: Motor loading (% for the motors Motor Percentage Loading Motor Description Actual KW Rated KW Chilled water pump -1 Chilled water pump -2 Condenser water pump - 1 Condenser water pump - 3 CT Fan 1 CT Fan 2 AHU Motors Percentage loading (%
7 Technical > =?@ $ #@-A?@ -?A/@-/@ Lighting System B # #-,, <- 5 B8! B2 -
8 Technical Table 8.3.7: Details of lighting source Item Compact Fluorescent lamp (CFL Compact Fluorescent lamp (CFL Compact Fluorescent lamp (CFL Fluorescent tube lamp (FTL-T8 Decorative Down lighter Down lighter Others Lighting Source Details Wattage Total number of lamps Table 8.3.8: Lighting fixtures and lamps Details of lighting fixtures and lamps Sl. No. Floor Location Type of lamp Type of luminaries No. of lamp Total Load (W Area (m ! #!0-2 Table 8.3.9: Illumination levels details area wise Area wise illumination level details S No. Area Average lighting level (lux 1 Office area_enclosed 2 Ofice area_open plan 3 Corridor 4 Restroom 5 Conference 6 Reception 7 Library
9 Technical 8 Others B"0 B"0(!#2 # ( 0 - C' B"0 /! Table : Lighting power density area wise Area wise lighting power density S No. Area Average LPD (W/m2 1 Office area_enclosed 2 Ofice area_open plan 3 Corridor 4 Restroom 5 Conference 6 Reception 7 Library 8 Other areas! Table : Monthly Lighting Consumption
10 Technical Monthly lighting consumption Months Load (kw Total Consumption January February March April May June July Augst September October November December Total #!/5 D6 D <5( Table : Illumination level comparison Illumination level comparison Area Average lighting level (lux NBC Recommended Office area enclosed Ofice area open plan Corridor Restroom Conference Reception Library For other areas kindly refer national building code 2005 B0 B"0(!# 5 66 B"0 Table : LPD comparison
11 Technical LPD Comparison Area Average LPD (W/m2 ECBC Recommended Office area_enclosed 11.8 Ofice area_open plan 11.8 Corridor 5.4 Restroom 9.7 Conference 14 Reception 12.9 Library 11.8 For LPD at other areas kindly refer ECBC 2007 ' B0 B"0(!# 5 66 B"0
12 Technical Table : Overall LPD Comparisons Area Over all Building Overall LPD Comparison Average LPD ECBC (W/m2 Recommended 11.8 " 6 6D6 6B" B"0 +6 6! # 5, # - *5 -- -, (-! / %- 5 ' '.. * 'D + 6 6
13 Technical (86 -! 62 55, /-52 /-5/-5 # HVAC system 4+6 # --@ C@ , 4+6,!
14 Technical Table : HVAC rated parameters HVAC Rated Parameters Equipment type Make Model Type Condenser type Rated capacity Refrigerant used Supply chilled water temperature Entering condenser water temperature Rated KW Fuel Used No. of chillers installed Equipment Type Capacity Head Rated motor kw No. of pumps installed Equipment Type Capacity Head Rated motor kw No. of pumps installed Equipment Capacity Fan motor rating No. of CTs installed Make Chiller chilled water pumps Condenser water pump Cooling Tower 6! 6 864( :64(8
15 Technical Fig Overview of Chiller Performance Test Fig Overview of pump performance Test "! 4 - <
16 Technical +4;! +4; +4;! +4; Fig Overview of AHUI performance Test < +4;= +4;! +4; +4;! +4; < +4;=
17 Technical 6! -:4.. Fig Overview of cooling tower test 4+6! --, - +6 C*/ Table : Monthly estimated consumption Months Chiller AHUs April May June July Augst September October November December January February Monthly Estimated HVAC Consumption CHW pump Cooling water pump and CT fan
18 Technical +6, 4+6 "! - $ Table : Performance evaluation for chiller Performance Evaluation of Chiller Description Units Parameters Water side Chiller Leaving Chilled water temperature Deg. C Entering Chilled water temperature Deg. C Temp. Difference Deg. C Chilled water flow M3/hr Leaving Condenser water temperature Deg. C Entering Condenser water temperature Deg. C Temperature Difference Deg. C Input power KW Capacity TR KW/TR COP " "! CHW Primary Pump No-1 CHW Primary Pump No-2 CDW No-1 CDW No-3 Table : Performance evaluation for pumps Performance Evaluation for pumps Actual Rated Actual Rated Rated Actual Flow Flow Head head Efficiency KW KW GPM GPM M M % " +4;! +4;
19 Technical Basement 1 First Floor Second Floor Third Floor Table : Performance evaluation for Air Handling Units Performance Evaluation for Air handling units AHU Location Actual Capacity Rated Capacity Actual Capacity Rated Capacity Units CFM CFM TR TR "!0 53
20 Technical Table : Performance evaluation for Cooling Towers Performance Evaluation for Cooling Towers Parameters Air discharge area (ft 2 Air velocity (ft/min Air flow (CFM Entering water temp (0 C Leaving water temp (0 C Ambient wet bulb temp (0 C Range (0 C Wet bulb approach (0 F Effectiveness (% 6!# 5: 5/+84:+ Table : Cooling demand comparison Description Over all Building Cooling Demand Comparison Design Peak cooling demand ASHRAE recommended cooling demand (ft2/tr (ft2/tr !55 - : - D6 Table : Thermal comfort Building Location Average Temp. Average RH Thermal Comfort NBC Recommended temperature deg C NBC recommended Relative humidity (%
21 Technical " D ; 6 # $% (,, -, =$ % Controls in the HVAC system recommended by Energy Conservation Building Code (ECBC / +! 6 < # / - # 5
22 Technical +, *6 $ + --
23 Technical $ -, $ # - #, $< - + E, 4+6- (66 2@/@ #-E # # : - 141(
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Copyright 24, American Society of Heating, Refrigerating & Air-Conditioning Engineers, Inc., 79 Tullie Circle NE, Atlanta, GA. 3329. Reprinted by permission from the September 24 Issue of ASHRAE Journal