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Refrigerated Warehouse: How to generate cooling loads?

asked 2016-05-03 13:03:14 -0500

Dustinl gravatar image

updated 2017-05-03 20:52:48 -0500

Hello all guru's,

I'm in the process of migrating our firm over to Energy Plus/OpenStudio from Energy Pro and I am having some difficulty with generating loads (typically they are lower than what I would expect probably best saved for another posting). Currently my issue is with a simple refrigerated warehouse, it has two refrigerated zones: one to be kept at 45deg and the other at 34. After I run the simulation there isn't any data generated for of the load profiles in either Energy Plus or OpenStudio.

One I had an error with the cooling supply air temp at 29deg(f) in the Cooling Sizing Parameters tab. I adjusted it to 32 and the error went away.

I've modeled a simple refrigerated cooler system and I think everything is set up properly. Although I can select the space for the cooler its serving it is not attached to the Zone Equipment for the space n the Thermal Zones tab. I have Ideal Air Loads on.

Does anyone have an idea as to why I'm not getting any data in the design load output?

Can anyone help with this issue? I'm at a loss and would be happy to send out any file that may help.

Thanks,

Dustin

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answered 2016-05-10 08:34:46 -0500

kwalkerman gravatar image

The only way to model a refrigeration system properly is to use the Refrigeration objects. The normal zone conditioning equipment (even IdealLoads) does not work well for refrigerated zones.

For refrigerated zones, you will need to use the following equipment:

For the Zone: Refrigeration:AirChiller ZoneHVAC:RefrigerationChillerSet

For the refrigeration system, some combination of the following:

Refrigeration:Condenser:AirCooled

and/or

Refrigeration:Condenser:WaterCooled

and/or

Refrigeration:Condenser:Evaporative Cooled

and

Refrigeration:Compressor

Take a look at the example file: "RefrigeratedWarehouse.idf"

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Asked: 2016-05-03 13:03:14 -0500

Seen: 245 times

Last updated: May 10 '16