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Thread: Cooling Load
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20-03-2014, 07:47 AM #1
Cooling Load
I am designing a HVAC system for a location off the coast of Nigeria.
Along with the AHU there is chiller system which I am trying to size.
To calculate the cooling load can I simply use the volume airflow multiplied by the density of air and the delta T? Or do I have to use the equation:
Qc = ma(ho – hs)
My problem with the later method is whilst I have the db and wb of the outside conditions i only have the db of the supply conditions so pinning down the process line of the psychrometric chart is difficult.
Would an acceptable solution be to estimate the %RH for the supply conditions?
Any advice would be appreciated.
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20-03-2014, 10:37 AM #2
Re: Cooling Load
do you have a cooling load for the space already?
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20-03-2014, 05:22 PM #3
Re: Cooling Load
Well i have calculated it using the air flow, air density and delta T but i dont think that is correct???
Is that a correct assumption
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20-03-2014, 08:49 PM #4
Re: Cooling Load
Hi Chris, yes that is how I would do it.
Q= m x cp x DTThe difference between genius and stupidity is that genius has its limits.
Marc
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21-03-2014, 07:25 AM #5
Re: Cooling Load
Thanks Marc,
I was not sure if i should be using the enthalpies.
Really appreciated.
Regards
Chris