Re: [EnergyPlus_Support] the simulation of the chiller

[Sankar Padhmanabhan <sankar.padhmanabhan@xxxxxxxxxxx>]

Lym,
The pump adds heat to the fluid in the loop and since it is placed in 
between chiller condenser outlet and cooling tower inlet you will see an 
increase in temperature. Also you can check to see if there is any flow 
in the condenser demand side bypass. If there is flow in that branch 
then you will see a mixed temperature entering the pump, which will be 
less than chiller condenser outlet temperature. In anycase the 
temperature won't match exactly due to the pump heat.

Thanks
Sankar

llyymmff wrote:
>
> Hi,
> I have a question when I do the simulation of the chiller, could you
> please help me?
> Why is there some temperature difference between the chiller condenser
> and the cooling tower?
> For example, the outlet temperature of the chiller condenser does not
> equal the inlet temperature of the cooling tower.
> I don't know why. Should the outlet water temperature of the chiller
> condenser be the same as the inlet water temperature of the cooling
> tower (when these two equipements are connected)? The document explains
> the temperature difference between the inlet of the condenser and the
> outlet of the cooling tower, but I don't find the reason for the
> difference between the outlet of condenser and the inlet of cooling
> tower?
> I observed that the difference be decided by the water flow rate. when
> the water flow rate is larger the temperature difference is smaller.
> I cannot explain it, please help me.
> Thank you very much!
> Best regards!
> lym
>
>  

-- 
Sankar Padhmanabhan
Graduate Research Assistant
PhD Student
Mechanical & Aerospace Engg
Oklahoma State University,
Stillwater, OK-74078
Ph:405-744-4380


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