[Equest-users] PTAC Curve

[David Reddy]

Lee-
The EIR modefier curve acts as a multiplier on the COOLING-EIR value, 
which is the the reciprocal of the COP.  Therefore, if you multiply the 
your curve values times the COOLING-EIR and take the inverse, you will 
see that the efficiency is actually decreasing, approaching COP=1.0 at 
low temperatures.  Keep in mind that this curve is not the only EIR 
modifier curve, there is also the PLR curve...

-David

On 8/22/2012 9:18 AM, Lee Chorney wrote:
> Hi Everybody,
>
> Does anyone understand the heating EIR curves used for PTACS in 
> Equest? It is the "DX-Heat-EIR-fEDB&OAT" curve. I calculated the curve 
> using excel (see attached spreadsheet) and found as the outside air 
> gets colder the efficiency of the heating curve increases. Does that 
> make sense to anyone?
>
> Thanks in advance,
>
> Lee
>
>
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