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javier83 (Mechanical)
30 Oct 07 11:00
Hi!

Does someone know where I can find Equivalent Full Load Cooling Operating Hours by city or state? Or how to calculate these hours given the cooling degree days?

Thank you all!

Javier
MintJulep (Mechanical)
30 Oct 07 14:54
Not sure what you are really after, since full load hours would be building specific.

You may find TMY data helpful.

http://rredc.nrel.gov/solar/old_data/nsrdb/tmy2/

gepman (Electrical)
3 Nov 07 9:28
javier83
I never heard the term before and I always use a BIN analysis (there is a recent thread on this subject), however I found the following information on the web:

Annual equivalent full load cooling hours (AEFLCH) is the number of hours an air conditioner would run at full load to consume the same amount of electric energy that it consumes on average over the course of an entire year. AEFLCH can be estimated through the use of cooling degree day data. A discussion about estimating cooling loads using degree days can be found in the 1997 ASHRAE Handbook, Chapter 30, page 30.17. For information about ASHRAE publications, go to www.ASHRAE.org.

Helpful Member!  bbohsali (Mechanical)
3 Nov 07 15:44
EFLH is (was) used to very quickly calculate the annual energy consumption of an A/C device.  Annual Energy Consumption (kWHr)= full load kW/Ton x Load (Tons) x EFLH

The proliferation of PC and software that can easily and quickly calculate a more accurate energy consumption have reduced reliance on EFLH.

I have seen the Table you are looking for in a couple of Value Engineering Handbooks and can email some info if remain interested. I also believe such a Table exists in the old Carrier handbooks.

Regards,

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