Convert EIR to COP

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Good Day,

I'm busy going through SIM files for locating the COP of a refrigeration system. I managed to find the EIR, from what I've researched eQUEST converts the COP into EIR in the background. However what is the formula for converting the EIR to the COP?

Many Thanks

Kind Regards


dlapping's picture
Joined: 2017-04-22
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COP = (Gross Cooling Capacity [btu/hr]) / ((Total package unit input power [kW] - Supply Fan power [kW]) x 3413 [btu/kW-hr])

You have to remove the supply fan power*

COP = 1/EIR  (as long as supply fan power is removed)

This is from ASHRAE 90.1-2016

JohnLucente's picture
Joined: 2017-10-16
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