[Equest-users] Equest-users Digest, Vol 10, Issue 28

[Xiaobing Liu]

DIV {
	MARGIN: 0px
}James :

You are right, eQUEST/DOE-2 uses the ARI rating fluid temperature to WSHP system simulation. Furthermore, it distinguishes the different rating fluid temperatures for WLHP (with cooling tower and boiler) and GLHP (with ground loop) system. For GLHP application, the ARI rating condition is 77F for cooling and 32F for heating.

For this reason, in the ClimateMaster heat pump library, which is an add-on feature of eQUEST, performance curves are normolized at the different rating conditions for WLHP and GLHP systems, so do the EIR, condenser head loss (due to different flow rate for WLHP and GLHP applications), and capacity. 

Xiaobing


> Message: 6
> Date: Fri, 23 Jan 2009 11:26:23 -0600
> From: "James Hess" 
> Subject: [Equest-users] Question regarding rating temperature for
> Water Source Heat Pumps
> To: 
> Message-ID:
> 
> Content-Type: text/plain; charset="us-ascii"
>
> I was wondering if anybody knows what eQuest assumes for the rated
> temperature that corresponds to the cooling and heating EIR's for water
> source heat pumps.
>
>
>
> For WSHP's, the standard rating temperatures are defined as 86 degrees for
> cooling and 68 degrees for heating, per the ARI/ASHRAE/ISO 13256-1 standard.
>
>
>
> I would assume that these are the temperatures that eQuest uses, but just
> wanted to confirm. I couldn't find any information regarding this topic in
> the help files.
>
>
>
> Appreciate your help.
>
>
>
> Thanks!
>
>
>
> Regards,
>
>
>
> James
>
>
>
> James A. Hess, PE, CEM
>
> Energy Engineer
>
> TME, Inc.
>
> Little Rock, AR
>
> ph 501-666-6776
>
> cell 501-351-4667
>
> jhess at tmecorp.com 
>
>

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