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Technical Guidelines Benefits

Development of Building Regulations and Guidelines to Achieve Energy Efficiency in Bangalore City

CHAPTER 8 Mandatory energy audit

8.1 Guideline

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8.3.1 Energy demand and Consumption

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Table 8.3.1: Building energy consumption

Building Energy Consumption Sanctioned demand KVA Monthly Energy Consumption Pattern Cost Month kWh KVA PF kW Energy Charges Demand Charges Total Cost January February March April May June July August September October November December

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Table 8.3.2: EPI Comparison

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

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(kWh/annum/m2) BEE recommended EPI

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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 Transformer Make Rated KVA High side Voltage Low Side Voltage Type of Cooling Frequency Year of Manufacturing

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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

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Table 8.3.5: Motor measured parameters

Motor Percentage Loading

Motor Description Actual KW Rated KW

Percentage loading (%)

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 8.3.7: Details of lighting source

Lighting Source Details

Item Wattage Total number of

lamps Compact Fluorescent lamp (CFL) Compact Fluorescent lamp (CFL) Compact Fluorescent lamp (CFL) Fluorescent tube lamp (FTL-T8) Decorative Down lighter Down lighter Others

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 (m2)

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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

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3 Corridor 4 Restroom 5 Conference 6 Reception 7 Library



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Table 8.3.10: 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

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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



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Table 8.3.14: Overall LPD Comparisons

Overall LPD Comparison Area Average LPD

(W/m2) ECBC

Recommended Over all Building

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Table 8.3.15: HVAC rated parameters

HVAC Rated Parameters Equipment type Chiller 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 chilled water pumps Type Capacity Head Rated motor kW No. of pumps installed Equipment Condenser water pump Type Capacity Head Rated motor kW No. of pumps installed Equipment Cooling Tower Capacity Fan motor rating No. of CTs installed Make

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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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Fig 8.3.3 Overview of AHUI performance Test

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Table 8.3.16: Monthly estimated consumption

Monthly Estimated HVAC Consumption

Months Chiller AHUs CHW pump

Cooling water pump and CT fan

April May June July Augst September October November December January February



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Table 8.3.17: 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

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Table 8.3.18: Performance evaluation for pumps

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Performance Evaluation for pumps Actual

Rated Actual Flow Rated Flow

Actual Head

Rated head Efficiency

KW KW GPM GPM M M % CHW Primary Pump No-1 CHW Primary Pump No-2 CDW No-1 CDW No-3



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Table 8.3.19: Performance evaluation for Air Handling Units

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Performance Evaluation for Air handling units AHU Location Actual Capacity Rated Capacity Actual Capacity Rated Capacity

Units CFM CFM TR TR Basement 1

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Second Floor

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Table 8.3.20: Performance evaluation for Cooling Towers

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Table 8.3.21: Cooling demand comparison

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Table 8.3.22: Thermal comfort

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 (%)

Cooling Demand Comparison Description Design Peak cooling demand

(ft2/TR) ASHRAE recommended cooling demand

(ft2/TR) Over all Building

250-300

Thermal Comfort Building Location Average

Temp. Average

RH NBC Recommended temperature deg C

NBC recommended Relative humidity (%)

24-26 50-60 24-26 50-60



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8.3.6 Controls in the HVAC system recommended by Energy Conservation Building Code (ECBC)

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8.4 Benefits

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Documents

Proposed Mandatory Cost