Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
4

Refrigerated Warehouse: How to generate cooling loads?

asked 2016-05-03 13:03:14 -0600

Dustinl's avatar

updated 2024-05-28 18:19:11 -0600

sashadf1's avatar

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, that issue is 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 45 deg F and the other at 34 deg F. After I run the simulation there isn't any data generated for the load profiles in either Energy Plus or OpenStudio.

There is an error with the cooling supply air temp at 29deg(f) in the Cooling Sizing Parameters tab. I adjusted it to 32 deg F, 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 and 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

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
1

answered 2016-05-10 08:34:46 -0600

kwalkerman's avatar

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"

edit flag offensive delete link more

Comments

@kwalkerman, could you please share the idf file once more? Can't see the file. Thank you :)

Dongmin's avatar Dongmin  ( 2020-07-13 00:48:20 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 2016-05-03 13:03:14 -0600

Seen: 665 times

Last updated: May 28