recommended by the NBC with an energy-efficient HVAC design by following ...
controls, which optimizes the energy performance of air-conditioning systems.
Energy Efficient HVAC Design
CHAPTER
Guidelines
Proposed Mandatory Clause
Technical Guidelines
5 Energy Efficient HVAC Design
5.1 Guideline
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Development of Building Regulations and Guidelines to Achieve Energy Efficiency in Bangalore City
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5.3.1 Guidelines on optimization of cooling load estimation
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Table 5.3.1: Inside design conditions for air-conditioned spaces in the Bangalore city S. No.
Category
Inside design conditions
(I)
Restaurants
DB 23 to 26 C
(ii)
Office buildings
DB 23 to 26 C RH 55 to 60%
(iii)
Radio and television studios
DB 23 to 26 C
RH 55 to 60%
RH 45 to 55% (iv)
Departmental stores
DB 23 to 26 C RH 50 to 60%
(v)
Hotel guest rooms
DB 23 to 26 C RH 50 to 60%
(vi)
Classroom
DB 23 to 26 C RH 50 to 60%
(vii)
Auditoriums
DB 23 to 26 C RH 50 to 60%
(viii)
Recovery rooms
DB 24 to 26 C RH 45 to 55 %
(ix)
Patient rooms
DB 24 to 26 C RH 45 to 55 %
(x)
Operation theatres
DB 17 to 27 C RH 45 to 55 %
(xi)
Museums and libraries
DB 20 to 22 C RH 40 to 55 %
(xii)
Telephone terminal rooms
DB 22 to 26 C RH 40 to 50 %
1DB: Dry bulb temperature, RH: Relative humidity
Development of Building Regulations and Guidelines to Achieve Energy Efficiency in Bangalore City
Benefits
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Guidelines
Proposed Mandatory Clause
Technical Guidelines
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Table 5.3.2: Recommended outdoor design conditions for the Bangalore city for cooling load estimation Cooling DB/MCWB 0.4 %
1.0 %
MCW B DB
DB
Cooling WB/MCDB
34.7 19.6
2.0 %
MCWB DB
34
19.6
0.4 %
MCWB
33.1
19.2
1.0 %
2.0 %
WB MCDB WB MCDB
WB
MCDB
23.5
22.5
27.7
28.9 22.9 28.2
1DB: Dry bulb temperature, MCWB: Mean coincidental wet bulb temperature, WB: Wet bulb temperature, MCDB: Mean coincidental dry bulb temperature
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Outside Air Damper
Energy recovery wheel
Supply Air
Outdoor Air
Return Air Air Exhaust Air
EA and OA Filters
Table 5.3.3: Minimum ventilation rates in the breathing zone (This table is not valid in isolation; it must be used in conjunction with the accompanying notes) Occupancy category
Office Buildings Office space Reception areas Telephone/data entry Main entry lobbies
People Outdoor Air Rate RP
Area Outdoor Air Rate Ra
cfm/person
L/s person
cfm/ft2
L/s m2
5 5
2.5 2.5
0.06 0.06
0.3 0.3
5
2.5
0.06
5
2.5
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Occupant Density (see Note 4) #/1000 ft2 or #/100 m2
Combined Outdoor Air Rate (see Note 5)
Air Class
Cfm/person
L/s person
5 30
17 7
8.5 3.5
1 1
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Table5.3.4: Values of performance characteristics of two-pole and four-pole energy-efficient induction motors Rated output
Two-pole motor nominal efficiency
Four-pole motor nominal efficiency
(kW)
for eff 1
for eff 1
(%)
(%)
0.37
70.2
73
0.55
74
78
0.75
77
82.5
1.1
82.8
83.8
1.5
84.1
85
2.2
85.6
86.4
3.7
87.5
88.3
5.5
88.6
89.2
7.5
89.5
90.1
9.3
90
90.5
11
90.5
91
15
91.3
91.8
18.5
91.8
92.2
22
92.2
92.6
30
92.9
93.2
37
93.3
93.6
45
93.7
93.9
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94
94.2
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94.6
94.7
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95
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110
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Development of Building Regulations and Guidelines to Achieve Energy Efficiency in Bangalore City
