Cooling load temperature difference calculation method: Difference between revisions

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{{orphanConfusing|date=February 20172024}}{{Too technical|date=February 2024}}
 
The '''cooling load temperature difference (CLTD)''' '''calculation method''', also called the '''cooling load factor''' '''(CLF)''' or '''solar cooling load factor''' '''(SCL) method''', is a method of estimating the [[cooling load]] or [[heating load]] of a building. It was introduced in the 1979 [[ASHRAE]] handbook.
 
==CLTD/CLF/SCL cooling load calculation method==
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Q = U*A*CLTD <ref name=SML/><ref name=Textbook/>
 
Q = U*A*Td(T2-T1)
 
Where UQ = over allOverall heat transfer BTU\HRin Btu per hour
U = Overall heat transfer coefficient in Btu/(ft2-hr-deg F)
A = Area ft2in square feet
T1 = outdoor temperature °in degrees F
T2 = indoor temperature °in degrees F
 
Where U= over all heat transfer BTU\HR
A=Area ft2
T1= outdoor temperature °F
T2= indoor temperature °F
===For heat gains due to people, equipment (hooded and unhooded), and lighting===
 
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===Data tables===
 
In addition to tables published by [[ASHRAE]] for select latitudes, a computer program called CLTDTAB, availablereleased sincein 1993 and no longer available, cancould behave been used to generate custom CLTD/CLF/SCL tables for a specific zone type for any [[latitude]] and month. This allowsused to allow the use of this method, without interpolation, for any area in the world.<ref name=SML/>
 
If thea program similar CLTDTAB is used, the results obtained using this method will tend to be very close to the more rigorous TFM Method mentioned earlier.<ref name=SML/> CLTDTAB is no longer available, similar software can be purchased and downloaded.
 
==References==
{{reflist}}
 
[[Category:Heating, ventilatingventilation, and air conditioning]]