CHAPTER 5 Energy 5.1 Guideline
5.2 Mandatory clause 5.3 Technical notes #$$% #$$% #$$& ( ) +, (./
5.3.1 on optimization of cooling load estimation %0 Table 5.3.1: Inside design conditions for airconditioned spaces in the Bangalore city S. No. Category Inside design conditions (I) Restaurants DB 23 to 26 C RH 55 to 60% (ii) Office buildings DB 23 to 26 C RH 55 to 60% (iii) Radio and television studios DB 23 to 26 C RH 45 to 55% (iv) Departmental stores DB 23 to 26 C RH 50 to 60% (v) Hotel guest rooms DB 23 to 26 C RH 50 to 60% (vi) Classroom DB 23 to 26 C RH 50 to 60% (vii) Auditoriums DB 23 to 26 C RH 50 to 60% (viii) Recovery rooms DB 24 to 26 C RH 45 to 55 % (ix) Patient rooms DB 24 to 26 C RH 45 to 55 % (x) Operation theatres DB 17 to 27 C RH 45 to 55 % (xi) Museums and libraries DB 20 to 22 C RH 40 to 55 % (xii) Telephone terminal rooms DB 22 to 26 C RH 40 to 50 % 1DB: Dry bulb temperature, RH: Relative humidity
%2# Table 5.3.2: Recommended outdoor design conditions for the Bangalore city for cooling load estimation Cooling DB/MCWB Cooling WB/MCDB 0.4 % 1.0 % 2.0 % 0.4 % 1.0 % 2.0 % DB MCW B DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB 34.7 19.6 34 19.6 33.1 19.2 23.5 28.9 22.9 28.2 22.5 27.7 1DB: Dry bulb temperature, MCWB: Mean coincidental wet bulb temperature, WB: Wet bulb temperature, MCDB: Mean coincidental dry bulb temperature $30$#$4 2%550&%.( 04. $34 6 )7 8,89#0#$$&6 7
%22 Outside Air Damper Energy recovery wheel Supply Air Outdoor Air Exhaust Air Return Air Air EA and OA Filters Table 5.3.3: Minimum ventilation rates in the breathing zone Occupancy category (This table is not valid in isolation; it must be used in conjunction with the accompanying notes) People Outdoor Air Rate RP cfm/person L/s person Area Outdoor Air Rate Ra cfm/ft 2 L/s m 2 Notes Occupant Density (see Note 4) #/1000 ft 2 or #/100 m 2 Combined Outdoor Air Rate (see Note 5) Cfm/person L/s person Air Class Office Buildings Office space 5 2.5 0.06 0.3 5 17 8.5 1 Reception 5 2.5 0.06 0.3 30 7 3.5 1 areas Telephone/data 5 2.5 0.06 0.3 60 6 3.0 1 entry Main entry 5 2.5 0.06 0.3 10 11 5.5 1 lobbies
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>. 96) 7 9%4 9 5$4 & 0%23# C3 80#90%+#$$3D D 6., 7 Table5.3.4: Values of performance characteristics of twopole and fourpole energyefficient induction motors Rated output Twopole motor nominal efficiency (kw) for eff 1 for eff 1 (%) (%) Fourpole motor nominal efficiency 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 55 94 94.2 75 94.6 94.7 90 95 95 110 95 95.2
Rated output Twopole motor nominal efficiency (kw) for eff 1 for eff 1 (%) (%) Fourpole motor nominal efficiency 125 95.3 95.5 132 95.3 95.5 160 95.5 95.8 5.2.3 for energyefficient chillers + = ( )$+,,. / + Minimum S. No. Equipment class Minimum COP Test standard IPLV Unitary air cooled air conditioner 19 and <40 kw ( 5.4 3.08 ARI 210/240 1 and <11 tons ) 2 Unitary air cooled air conditioner 40 to <70 kw (11 to 3.08 ARI 340/360 3 Unitary air cooled air conditioner 70 kw (20 tons) 2.93 2.99 ARI 340/360 4 Unitary water cooled air conditioner <19 kw (<5.4 tons) 4.1 ARI 210/240 5 Unitary water cooled air conditioner 19 and <40 kw (5.4 4.1 ARI 210/240 6 and Unitary <11 water tons ) cooled air conditioner <40 kw (11 tons ) 3.22 3.02 ARI 210/240 S. No. Equipment class Minimum COP Minimum IPLV Test standard 1 Air cooled chiller <530 kw (<150 tons) 2.9 3.16 ARI 550/5901998 2 Air cooled chiller 530 kw (150 tons) 3.05 3.32 ARI 550/5901998 3 Centrifugal water cooled chiller < 530 kw (<150 tons) 5.8 6.09 ARI 550/5901998
Minimum S. No. Equipment class Minimum COP Test standard IPLV Centrifugal water cooled chiller 530 and <1050 kw ( 5.8 6.17 ARI 550/5901998 4 150 and <300 tons) Centrifugal water cooled chiller 1050 kw ( 300 tons) 6.3 6.61 ARI 550/5901998 5 6 Reciprocating compressor, water cooled chiller all sizes 4.2 5.05 ARI 550/5901998 7 Rotary screw and scroll compressor, Water Cooled Chiller 4.7 5.49 ARI 550/5901998 (<150 <530 kw tons) 8 Rotary screw and scroll compressor, water cooled 5.4 6.17 ARI 550/5901998 Chiller 530 and <1050 kw (150 and <300 tons) 9 Rotary screw and scroll compressor, water cooled chiller 1050 kw 5.75 6.43 ARI 550/5901998 5.4 0 6:7 0$ 9 : & 54 E #$$%
+, ) ) Payback Period 300 Incremental Investment Cumulative savings 250 Amount in lakh rupees 200 150 100 50 0 1 2 3 4 5 6 7 8 9 10 Years D o D ;6;)7, 5$ $$$$023< o 8 D E; 92