1 1 2103 2103 - - 454 Ventilation and Air Conditioning 454 Ventilation and Air Conditioning Cooling Load Cooling Load Calculations Calculations by by Assist. Prof. Dr. Tul Assist. Prof. Dr. Tul Manewattana Manewattana . . Chulalongkorn Chulalongkorn University University Bangkok, THAILAND Bangkok, THAILAND November 2010 November 2010
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2103-454 Ventilation and Air Conditioning Cooling Load ...
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21032103--454 Ventilation and Air Conditioning454 Ventilation and Air Conditioning
Cooling LoadCooling Load CalculationsCalculations
byby
Assist. Prof. Dr. Tul Assist. Prof. Dr. Tul ManewattanaManewattana.. ChulalongkornChulalongkorn UniversityUniversity
Bangkok, THAILANDBangkok, THAILAND
November 2010November 2010
22
Principles of Cooling LoadPrinciples of Cooling Load
33
Principles of Cooling LoadPrinciples of Cooling Load
44
Principles of Cooling LoadPrinciples of Cooling Load
55
Principles of Cooling LoadPrinciples of Cooling Load
66
Principles of Cooling LoadPrinciples of Cooling Load
77
Principles of Cooling LoadPrinciples of Cooling Load
Ventilation/Infiltration Heat GainVentilation/Infiltration Heat Gain
9696
Outside AirOutside Air
Sensible
Heat Gain
Total-CL
Sum
Latent Heat Gain
CFM, Design Conditions & Usage Profile
9797
Outdoor Air LoadOutdoor Air Load
9898
Ventilation CFM: Ventilation CFM: ASHRAE Standard 62ASHRAE Standard 62--20072007
9999
Example: Calculation of Ventilation Example: Calculation of Ventilation RateRate
100100
MiscellaneousMiscellaneous
101101
Duct Heat GainDuct Heat Gain
102102
Duct Leak LossDuct Leak Loss
103103
Duct Leakage ClassDuct Leakage Class
104104
Duct Heat Gain & Leak LossDuct Heat Gain & Leak Loss
Duct Heat Gain in % of RSHDuct Heat Gain in % of RSH --Supply Duct 1.5% (Typical Value)Supply Duct 1.5% (Typical Value) --Return Duct 1.5% (Typical Value)Return Duct 1.5% (Typical Value)
Duct Leakage in % of Total Air SupplyDuct Leakage in % of Total Air Supply --Supply Duct 3% (Typical Value)Supply Duct 3% (Typical Value) --Return Duct 0% (Typical Value)Return Duct 0% (Typical Value)
Note that these value are only approximated.Note that these value are only approximated.
105105
Effect of Internal MassEffect of Internal Mass
106106
Room Temperature VariationRoom Temperature Variation