[Equest-users] How to set the COP of a chiller as constant in eQuest?

[Joe Huang]

Do you not have a copy of a DOE-2.2 or DOE-2.1E manual? That would make it hard to 
understand how DOE-2 works.
DOE-2 has many performance curves, depending on the type of equipment. The EIR-FT curves 
are either bi-linear or bi-quadratic functions of the entering wetbulb and outdoor drybulb 
temperature. The EIR-FPLR curves can be linear, quadratic, or cubic functions of the Part 
Load Ratio (PLR).

By the way,what I said yesterday was in reference to packaged SYSTEMS. If your model 
contains a PLANT model with a Chiller, then
the keywords for the chiller performance curves change somewhat.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"


On 4/16/2013 11:09 PM, Esmireta wrote:
> Hi Joe,
> In the simulation of a district cooling system, the guidance requires a virtual plant 
> with a constant average efficiency.
> In the DOE curves, how can I know the meaning of the equation and the coefficients in 
> it? It seems there is no useful information in the DOE help.
> Thanks!
> Esmi
>
>
>
>
>
> At 2013-04-17 10:35:35,"Joe Huang" <yjhuang at whiteboxtechnologies.com> wrote:
>
>     DOE-2 modifies the COOL-EIR using several curves COOL-EIR-FT as a function of
>     outdoor conditions and COOL-EIR-FPLR as a function of the Part Load Ratio. I suppose
>     you could set those to be constant. Another way would be to just take the Cooling
>     Load from the SS-D report and divide that by your constant COP. But my question
>     would be, why do you want to do that ?
>
>     Joe
>
>     Joe Huang
>     White Box Technologies, Inc.
>     346 Rheem Blvd., Suite 108D
>     Moraga CA 94556
>     yjhuang at whiteboxtechnologies.com
>     www.whiteboxtechnologies.com
>     (o) (925)388-0265
>     (c) (510)928-2683
>     "building energy simulations at your fingertips"
>
>
>     On 4/16/2013 6:55 PM, Esmireta wrote:
>>     Dear all,
>>     I wonder how to set the COP of a chiller as constant? after I set the chiller type,
>>     the electric input ratio type is determined, which means the self-made constant
>>     curve cannot be input.
>>     Thanks!
>>     Esmi
>>
>>
>>
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>
>
>
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