Hi Peter and others,
This has been super helpful.
My customer's electrical designer has calculated the AC units 2.5 ton
at 9.5Kw.
so this really helps me to be able to go to him armed with good data.
thanks again,
jay
peltz power
On Aug 22, 2008, at 8:29 AM, Peter Parrish wrote:
There are two figures of merit that can be used to make the
conversion. The
simplist is EER.
First, how many "tons" the AC is rated at? Multiply that number by
12,000
BTU/hr per ton, to get the number of BTU/hr the AC system can pump
out of
the house.
Second, EER is the ration of the BTU/hr to electrical power the AC
consumes.
Divide the BTU/hr by EER and you get the power consumption.
There is a second figure of merit called SEER, it is similar to EER
but
takes a seasonal average. All ACs have a SEER rating.
Example: 3 ton AC rated at a SEER of 10. 3 ton equals 36,000 BTU/hr
and
consumes 3.6 kW (15 A at 240 VAC). If you run the AC for four hours
a day,
the energy consumed is14.4 kWh.
- Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
CA Lic. 854779, NABCEP Cert. 031806-26
[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of jay
peltz
Sent: Friday, August 22, 2008 7:23 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] offgrid system question
Can someone tell me how to convert AC "tons" to rough electrical load?
or is there a way?
I've got a customer who is wanting to install a AC unit and they tell
me its a 2.5 ton and uses 9000 watts.
( they haven't given me make or model yet)
thanks,
jay
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