Convert SEER to EER for eQUEST

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Two formulas that I've used in the past:

EER approximately equal to 0.9 * SEER
EER = -0.02SEER^2 + 1.12SEER

The first is just from general googling, and was a rough consensus value between several sources. The second is from the eQuest mailing list forums. Using a SEER of 10 gives you 9 from the first, and 9.2 from the second.

Just noticed a 2013 paper from Texas A&M, METHODOLOGY FOR CALCULATING COOLING AND HEATING ENERGY-INPUT-RATIO (EIR) FROM THE RATED SEASONAL PERFORMANCE EFFICIENCY (SEER OR HSPF). That paper presents correlations to give you COP as a function of SEER. They report this correlation works better than earlier methods from FSEC and ASHRAE RP-1197.

Find it here: http://repository.tamu.edu/handle/196...

The paper is marked DRAFT. Perhaps one of the authors can report on status.

-Erik

EIR is used in eQUEST,all the EER/SEER/HSPF will be converted to EIR finally.

where
CAP Total Cooling Capacity(Btu/h)
EER ARI Rated Energy Efficenice Ratio

Cooling EIR=(1/EER-0.012167)/((1/3.413)+0.012167)
Where
the constant 0.012167=(365/1000)(400/12000)
EER=SEER0.778+1.4

Heating EIR = (1/(COP3.413)-0.012167)/((1/3.413)-0.012167)
Heating EIR = (1/((HSPF0.28+1.13)*3.413)-0.012167)/((1/3.413)-0.012167)