[Equest-users] WSHP COP penalty

[Kevin Kyte]

Beka,

What I have experienced is that more efficient equipment loose less energy into the air stream.  So a premium efficient motor may save kWh's but slightly increase the gas usage because it has less heat contribution to supply air.
20% sounds excessive, but a closer look is needed to determine the actualities.

Kevin

________________________________
From: Shea, Rebecca [mailto:rshea at noresco.com]
Sent: Friday, April 30, 2010 9:19 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] WSHP COP penalty


We're replacing 125 WSHPs at a building that are about 15 years old.  The EER is going from about 8.5 to 15, and the COP is going from 2.9 to 4.5.  I would expect electric savings and a slight heating penalty for the increase in COP, but I'm getting -20% heating penalty.  Any help is appreciated...

-Beka
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