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Re: [EnergyPlus_Support] Coil:Cooling:DX:SingleSpeed - Flow Rate to Rated Total Capacity
The DX Coil model assumes the air flow per rated cooling capacity is
within a certain range. Manufacturers typically operate within this
range. Look at the air flow rate and capacity for the DX coil. Make sure
the air flow per capacity is within the range of 0.00002684 - 0.00006713
(m3/W). Or 200 cfm/ton - 500 cfm/ton.
AirFlowPerCapacityRatio (m3/W) = Rated Air Flow Rate (m3) / Rated Total
Cooling Capacity (W)
I typically choose to operate between 0.00004 - 0.00005 m3/W. Approx 300
- 400 cfm/ton.
khaysepro wrote:
>
>
> I am trying to model an existing system to verify energy usage for a
> LEED project. I am getting a severe error when I run the model because
> the cooling capacity is sized for a design peak load condition that
> does not exist in actual usage. Design airflow and cooling capacity
> was calculated by a commercial load estimating software package that
> apparently does not model DX coils a rigorously as E+. Is there away a
> to work around the airflow per cooling capacity limits for this type
> of coil?
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL 32922-5703
Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
UCF - From Promise to Prominence: Celebrating 40 Years
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