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Re: [EnergyPlus_Support] Equipment Capacity Problem
The example files are meant to help you understand the specific object
requirements for assembling and using that object in E+. In most cases,
the example files represent "good practice" design. However, there are
still some example files that simply show the input requirements and
connection scheme. You are correct, the AC system is over-sized. I also
recall that it is critical that the inputs to the parameter estimate
model be correct for a given size AC and GLHE. So be careful to
correctly size this system's components when changing inputs to this model.
O. Tugrul Karaguzel wrote:
>
> Hi guys,
> I was analyzing energy Plus sample model (named as GSHP-GLHE.idf) for
> Ground Source Heat Pumps, and I realized that this model has
> HeatPump:WaterToWater:Parameter:Estimation:Heating and Cooling
> equipments with nominal capacities of 50,000 and 45,000 W,
> respectively. I also checked sample building's design heating and
> cooling loads which were about 14,000 and 16,000 W respectively (these
> are loads calculated using a sizing factor of 1.2).
> How come does a GSHP equipment have a nominal capacity which about 3.5
> times greater than design heating load of a building? Isn't this
> equipment significantly over-sized? or is there any other explanation
> for such a relationship between loads and system capacities?
> Thanks.
> Omer T. Karaguzel PhD Candidate
> Center for Building Performance & Diagnostics (CBPD)
> Carnegie Mellon University
> Pittsburgh U.S.A.
>
>
>
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