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Re: [EnergyPlus_Support] Re: cop and iplv values of a chiller, also i have the part load performance



You don't have to model two curves, this sentence refers to the chiller object, it has an input where you write the minimum part load ratio which can be satisfied by the chiller. Below this value the chiller has to cycle, turning off and on to met the load.
So it means you only have an EIRFPLR curve and if the PLR value is lower than the value you entered as input (in my case the value was 0.2)the chiller will cycle.
I hope this help you.

On 7 August 2012 01:32, andresdagm <andresdagm@xxxxxxxxx> wrote:
 



Hi, thank you
it helped me, but i see somethnig rare in my model, my chiller consume more that i thinked, i have tried with two diferents model, maybe the problem is the part load curve, i have seen in your spreadsheet:
"IF THE CHILLER MODEL HAS 0.2 AS MINIMUM PART LOAD RATIO,THE SIMULATION WILL RIDE THE "EIR_s" CURVE UNTIL PART LOAD RATIO IS 0.2 AND THEN "
i dont know how to model two curves in one chiller,

Gracias


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Nacho Gomis <nachogo27@...> wrote:
>
> Hi,
> You can read the documentation,the engineering reference pdf file.It has
> the chiller models very well explained.
> I have also uploaded an spreadsheet to the yahoo group which leads you to
> obtain the three curves after providing the performance chiller data values.
> I hope this can help you.
> Ignacio Gomis
>
> ---------- Forwarded message ----------
> From: andresdagm
> Date: Tuesday, 31 July 2012
> Subject: [EnergyPlus_Support] cop and iplv values of a chiller, also i have
> the part load performance
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
>
>
>
>
> dear,
> Good day,
> I have the cop and iplv values of a chiller, also i have the part load
> performance values of
> EEFT Evaporator entering fluid temperature
> ELFT Evaporator leaving fluid temperature
> CEFT entering condenser water temperature
> CLFT leaving condenser water temperature
> CAP (ton)
> PCT Power
> kw/TR
> for each part load(15,20,30...100%)
>
> I dont know how to set it or how to transform it to can set this values in
> energy+, i think that the program could generate a curve with only COP and
> IPLv but i havent cant find that. Also i have tried to use Chiller:EIR and
> the EIRPLR curve is:
>
> EIRFPLR y = 1.9927x2 - 1.9632x + 1.0078
> R² = 0.9499
>
> i dont know if it is correct, also i dont know set up the other 2 curves
> because both are for full load, well, i think that because there ae onl
> function of temperatures.
>
> thank you in advance.
>




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