Car Park Ventilation
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Per ASHRAE Applications 2003Ch.12 and NFPA 88A
Parking Garage Ventilation Requirements
2. Peak Generation Rate G = NE/Af
Q ( CFM/FT2 )
ACH
16.40
180
0.002
29.09
0.71
2.61
=
1.5
Ib/hr
( Af ) 245,328 245,328 E
Ib/h*ft2 for parking garage per unit floor area
3. Normalized value of generation using reference value G0 = 5.46 X 10 -3 Ib/h*ft2 4. Q = C*f*Seconds CFM/FT2 5. Maximum level of CO concentration C = 1.363 x 10 -4 cfm/ft2 * seconds for 25 ppm CO 6 air changes per hour is no longer a valid criteria - per NFPA 88A 1 cfm / ft2 is needed.
f = 100 * G/G0
L/S TOTAL based on 1 cfm/ft 2
f
1. Average cold emission in winter & Summer
Area ft 2
Area m 2 22,800 22,800
AT 1 CFM /SQ. FT. TOTAL CFM =
G
260.5
L/S TOTAL based on CO demand ventilation
Av. Time of operation & travel time / car seconds
0.5
Operating # of Cars
Total # of Cars 521 521
% cars in operation
Parking Level B1
CFM @ 25 ppm CO
Height ft
5
N
Ht. M
CO Demand Ventilation Control vs. Standard Ventilation
175,112 175,112
82,302 82,302
245,328 245,328
115,304 115,304
Electrical Requirements for Air Conditioning Systems Given via phone to Nabil Guindi on January 28, 2001 Retail Chiller 220 W/m2 160 ft2/Ton 16m2/Ton 1.1 kw /ton 16/1.1 = 14.545 m2/kw 0.0687 kw/m2 68.7 W/m2 Air 8 W/m2 1000 cfm = 1 HP @ 1 cfm / ft2 HP = 10.79 cfm/m2 / 1000 = 0.01079 hp * 746 w = 8W/m2 Pumps 3.1 W/m2 HP/Ton = 20/300 = 0.066 Hp/ Ton* 746 = 49.7 W/Ton / 16 m2 = 3.11 W/m2 (Previous experience) Total = 68.7 + 8 + 3.1 = 80 W/m2 X 110% Say 90 W / m2
Offices Chiller 44 W/m2 250 ft2/Ton 25 m2/Ton 1.1 kw /ton 25/1.1 = 22.7 m2/kw 0.044 kw/m2 44 W/m2 Air 8 W/m2 1000 cfm = 1 HP @ 1 cfm / ft2 HP = 10.79 cfm/m2 / 1000 = 0.01079 hp * 746 w = 8W/m2 Pumps 3.1 W/m2 HP/Ton = 20/300 = 0.066 Hp/ Ton* 746 = 49.7 W/Ton / 16 m2 = 3.11 W/m2 (Previous experience) Total = 44 + 8 + 3.1 = 55.1 W/m2 X 110% Say 60 W / m2
BUS PLATFORM VENTILATION BASED ON 17 CMF / FT2 AREA CFM / FT2 52186 17
CFM 887162
NOT REALISTIC FIND ANOTHER METHOD OR TAKE ANOTHER AREA FOR PLATFORM
Parking Garage Ventilation Requirements
2. Peak Generation Rate G = NE/Af
Q ( CFM/FT2 )
ACH
16.40
180
0.002
29.09
0.71
2.61
=
1.5
Ib/hr
( Af ) 245,328 245,328 E
Ib/h*ft2 for parking garage per unit floor area
3. Normalized value of generation using reference value G0 = 5.46 X 10 -3 Ib/h*ft2 4. Q = C*f*Seconds CFM/FT2 5. Maximum level of CO concentration C = 1.363 x 10 -4 cfm/ft2 * seconds for 25 ppm CO 6 air changes per hour is no longer a valid criteria - per NFPA 88A 1 cfm / ft2 is needed.
f = 100 * G/G0
L/S TOTAL based on 1 cfm/ft 2
f
1. Average cold emission in winter & Summer
Area ft 2
Area m 2 22,800 22,800
AT 1 CFM /SQ. FT. TOTAL CFM =
G
260.5
L/S TOTAL based on CO demand ventilation
Av. Time of operation & travel time / car seconds
0.5
Operating # of Cars
Total # of Cars 521 521
% cars in operation
Parking Level B1
CFM @ 25 ppm CO
Height ft
5
N
Ht. M
CO Demand Ventilation Control vs. Standard Ventilation
175,112 175,112
82,302 82,302
245,328 245,328
115,304 115,304
Electrical Requirements for Air Conditioning Systems Given via phone to Nabil Guindi on January 28, 2001 Retail Chiller 220 W/m2 160 ft2/Ton 16m2/Ton 1.1 kw /ton 16/1.1 = 14.545 m2/kw 0.0687 kw/m2 68.7 W/m2 Air 8 W/m2 1000 cfm = 1 HP @ 1 cfm / ft2 HP = 10.79 cfm/m2 / 1000 = 0.01079 hp * 746 w = 8W/m2 Pumps 3.1 W/m2 HP/Ton = 20/300 = 0.066 Hp/ Ton* 746 = 49.7 W/Ton / 16 m2 = 3.11 W/m2 (Previous experience) Total = 68.7 + 8 + 3.1 = 80 W/m2 X 110% Say 90 W / m2
Offices Chiller 44 W/m2 250 ft2/Ton 25 m2/Ton 1.1 kw /ton 25/1.1 = 22.7 m2/kw 0.044 kw/m2 44 W/m2 Air 8 W/m2 1000 cfm = 1 HP @ 1 cfm / ft2 HP = 10.79 cfm/m2 / 1000 = 0.01079 hp * 746 w = 8W/m2 Pumps 3.1 W/m2 HP/Ton = 20/300 = 0.066 Hp/ Ton* 746 = 49.7 W/Ton / 16 m2 = 3.11 W/m2 (Previous experience) Total = 44 + 8 + 3.1 = 55.1 W/m2 X 110% Say 60 W / m2
BUS PLATFORM VENTILATION BASED ON 17 CMF / FT2 AREA CFM / FT2 52186 17
CFM 887162
NOT REALISTIC FIND ANOTHER METHOD OR TAKE ANOTHER AREA FOR PLATFORM
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