Mandatory
energy audit
CHAPTER
Guidelines
Proposed
Mandatory Clause
Technical Guidelines
8 Mandatory energy audit
8.1 Guideline
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Mandatory
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Guidelines
Proposed
Mandatory Clause
Technical Guidelines
Benefits
8.2 Proposed Mandatory Clause:
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8.3.1 Energy demand and Consumption
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Development of Building Regulations and Guidelines to
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Mandatory
energy audit
Guidelines
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Table 8.3.1: Building energy consumption
Building Energy Consumption
Sanctioned demand
Monthly
Energy
Consumption Pattern
Month
January
February
March
April
May
June
July
August
September
October
November
December
kWh
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KVA
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Cost
Energy Charges
kW
KVA
Demand Charges
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Mandatory
energy audit
Guidelines
Proposed
Mandatory Clause
Technical Guidelines
Benefits
Table 8.3.2: EPI Comparison
Parameter
Energy Performance Index
EPI Comparison
Actual EPI
(kWh/annum/m2)
BEE recommended EPI
(kWH/annum/m2)
Climatic Zone – Temperate
Normalized EPI Bandwidth
(kWh/Sqm/Year)
Star Rating
400-350
1 Star
350-300
2 Star
300-250
3 Star
250-200
4 Star
Below 200
5 Star
Average Annual Hourly EPI AAh
EPI (Wh/hr/Sqm)
Star Rating
40-35
1 Star
35-30
2 Star
30-25
3 Star
25-20
4 Star
Below 20
5 Star
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Mandatory
energy audit
Guidelines
Proposed
Mandatory Clause
Technical Guidelines
Benefits
8.3.2 Audit of individual systems
8.3.3 Electrical system
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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
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Table 8.3.4: Motor rated parameters
Motor Rated details
Voltage
Current
Power factor
Motor Description
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
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Table 8.3.5: Motor measured parameters
Motor Percentage Loading
Rated
KW
Actual KW
Percentage
loading (%)
Motor Description
Chilled water pump -1
Chilled water pump -2
Condenser water pump -1
Condenser water pump -3
CT Fan –1
CT Fan –2
AHU Motors
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Table 8.3.6: Motor loading (%) for the motors
Motor Percentage Loading
Actual
Rated
Percentage loading
KW
KW
(%)
Motor Description
Chilled water pump -1
Chilled water pump -2
Condenser water pump 1
Condenser water pump 3
CT Fan –1
CT Fan –2
AHU Motors
Development of Building Regulations and Guidelines to
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Mandatory
energy audit
Guidelines
Proposed
Mandatory Clause
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Mandatory
energy audit
Guidelines
Proposed
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Table 8.3.7: Details of lighting source
Lighting Source Details
Item
Compact Fluorescent lamp (CFL)
Compact Fluorescent lamp (CFL)
Compact Fluorescent lamp (CFL)
Fluorescent tube lamp (FTL-T8)
Decorative Down lighter
Down lighter
Others
Total number of
lamps
Wattage
Table 8.3.8: Lighting fixtures and lamps
Sl.
No.
1
2
3
4
5
6
Floor
Location
Details of lighting fixtures and lamps
Type of
Type of lamp
luminaries
No. of lamp
Total Load (W)
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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
Development of Building Regulations and Guidelines to
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Mandatory
energy audit
Guidelines
Proposed
Mandatory Clause
Technical Guidelines
8 Others
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Table 8.3.10: Lighting power density area wise
S No.
1
2
3
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5
6
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Area wise lighting power density
Area
Average LPD (W/m2)
Office area_enclosed
Ofice area_open plan
Corridor
Restroom
Conference
Reception
Library
Other areas
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Table 8.3.11: Monthly Lighting Consumption
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Mandatory
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Monthly lighting consumption
Load (kW)
Total Consumption
Months
January
February
March
April
May
June
July
Augst
September
October
November
December
Total
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Table 8.3.12: Illumination level comparison
Area
Office area enclosed
Ofice area open plan
Corridor
Restroom
Conference
Reception
Library
Illumination level comparison
Average lighting level (lux)
NBC Recommended
300-500
300-500
50-100-150
100-150-200
300-500
200-300-500
200-300-500
For other areas kindly refer national building code 2005
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Table 8.3.13: LPD comparison
Development of Building Regulations and Guidelines to
Achieve Energy Efficiency in Bangalore City
Mandatory
energy audit
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LPD Comparison
Average LPD (W/m2)
Area
Office area_enclosed
Ofice area_open plan
Corridor
Restroom
Conference
Reception
Library
Benefits
ECBC Recommended
11.8
11.8
5.4
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12.9
11.8
For LPD at other areas kindly refer ECBC 2007
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Development of Building Regulations and Guidelines to
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Mandatory
energy audit
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Table 8.3.14: Overall LPD Comparisons
Overall LPD Comparison
Average LPD
ECBC
(W/m2)
Recommended
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Mandatory
energy audit
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Table 8.3.15: 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
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Development of Building Regulations and Guidelines to
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Mandatory
energy audit
Guidelines
Proposed
Mandatory Clause
Technical Guidelines
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Fig 8.3.1 Overview of Chiller Performance Test
Fig 8.3.2 Overview of pump performance Test
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Table 8.3.16: Monthly estimated consumption
Months
April
May
June
July
Augst
September
October
November
December
January
February
Monthly Estimated HVAC Consumption
CHW
Cooling water pump and
pump
CT fan
Chiller AHUs
Development of Building Regulations and Guidelines to
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energy audit
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Proposed
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Table 8.3.17: Performance evaluation for chiller
Performance Evaluation of Chiller
Description
Units
Water side
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
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Table 8.3.18: Performance evaluation for pumps
CHW Primary Pump No-1
CHW Primary Pump No-2
Performance Evaluation for pumps
Actual
Rated
Actual
Rated Actual
Flow
Head
Flow
KW
KW
GPM
GPM
M
Rated
head
M
Efficiency
%
CDW No-1
CDW No-3
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Development of Building Regulations and Guidelines to
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Table 8.3.19: Performance evaluation for Air Handling Units
AHU Location
Performance Evaluation for Air handling units
Actual Capacity
Rated Capacity
Actual Capacity
Units
Basement
1
First Floor
2
CFM
CFM
TR
3
4
5
Second
Floor
6
7
8
9
Third
Floor
10
11
12
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Development of Building Regulations and Guidelines to
Achieve Energy Efficiency in Bangalore City
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Rated Capacity
TR
Mandatory
energy audit
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Table 8.3.20: Performance evaluation for Cooling Towers
Parameters
Performance Evaluation for Cooling Towers
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 (%)
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Table 8.3.21: Cooling demand comparison
Cooling Demand Comparison
Design Peak cooling demand
ASHRAE recommended cooling demand
(ft2/TR)
(ft2/TR)
250-300
Description
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Building
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Table 8.3.22: Thermal comfort
Building
Location
Average
Temp.
Average
RH
Thermal Comfort
NBC Recommended
temperature deg C
24-26
24-26
Development of Building Regulations and Guidelines to
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NBC recommended Relative humidity
(%)
50-60
50-60
Mandatory
energy audit
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