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

[Joe Huang]

I was referring to the DOE-2 Supplement, Version 2.1E, produced by LBNL in 1993 
(LBL-34947). I have not looked at the help function of eQUEST, so I can't tell how 
detailed is it.

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 4/21/2013 9:49 PM, Esmireta wrote:
> Hi Joe,
> Thanks for your reply!
> Is the DOE-2.2 manual the DOE help in the eQuest?
> Esmi
>
>
>
>
>
> At 2013-04-18 03:17:00,"Joe Huang" <yjhuang at whiteboxtechnologies.com> wrote:
>
>     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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