cafe heating/cooling load skylight
cafe heating/cooling load skylight
(OP)
skylight 25x25, with 16 bronze tinted skylights. will be a cafeteria underneath for 10-15 people. 14 ft high walls. constant volume system.
With U=1.0 and SC=0.73 for a singele 1/4" coated skylight, the cooling load comes to ~ 10 tons (4500 cfm) with Trace 700.
What is good estimate of U-value, SC.
Is 4500 Cfm too high? total area is 600 sf. almost 8 cfm/sf? what is good tonnage estimate?
pic attached.
With U=1.0 and SC=0.73 for a singele 1/4" coated skylight, the cooling load comes to ~ 10 tons (4500 cfm) with Trace 700.
What is good estimate of U-value, SC.
Is 4500 Cfm too high? total area is 600 sf. almost 8 cfm/sf? what is good tonnage estimate?
pic attached.





RE: cafe heating/cooling load skylight
RE: cafe heating/cooling load skylight
25"x25" or some other unit?
10 tons / 600 sqft = 60 sqft / ton.... which is pretty high. Typical cafe numbers would be 200-400 sqft/ton (from rules of thumb).
RE: cafe heating/cooling load skylight
7 TONS X 400 CFM/TON = 2800 CFM. ABOUT 5 CFM/SF.
IS 5CFM/SF TOO HIGH?
RE: cafe heating/cooling load skylight
You're essentially wanting to put about 6-7 times the capacity of what a typical house might need. I could see going 1 ton/200 sq ft, because of the humidity and higher body and equipment load.
Are you thinking you need to freeze everyone so that the turnover is higher?
TTFN
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RE: cafe heating/cooling load skylight
RE: cafe heating/cooling load skylight
TTFN
FAQ731-376: Eng-Tips.com Forum Policies