Defrost correction curve

asked 2015-03-30 16:28:21 -0500

Dan Briller
139 ●1 ●1

updated 2017-05-05 09:24:35 -0500

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

Has anyone else run into this error with Refrigerated Cases:

Severe ** GetRefrigerationInput: Refrigeration:Case="GLASS DOOR FROZEN FOOD A", invalid Defrost Energy Correction Curve Name not found:

The simulation then crashes.

I could not figure out any way to access or make changes to the field that contains the Defrost Energy Corrective Curve. Right now, it just says "None." Anytime I include a display case with antisweat heater capability this happens, which is kind of strange because defrost and anti-sweats are two different systems.

Edited from answer

I correct my earlier statement - I don't think its the antisweats - I think it is selecting a defrost system over than OffCycle or Hot Gas (w/o temperature termination).

FYI, I am working in Open Studio. Is the time termination feature part of OS, or do I need to convert the file to E+?

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Is this in OpenStudio or EnergyPlus? If you add the program tags you're more likely to get the attention of the right people.

Jamie Bull ( 2015-03-30 17:09:11 -0500 )edit

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answered 2015-04-02 09:24:23 -0500

Kyle Benne
6027 ●4 ●9 https://www.openstudio.net/

This is an OpenStudio bug or at least a missing feature. I'd say bug because we are showing you all of the defrost options even though you don't have the supporting fields to use them all. From the IO Ref on the "Defrost Energy Correction Curve Name" field.

"The defrost energy correction curve name is used only for the Electric with Temperature Termination, Hot-Gas with Temperature Termination, and Hot-Brine with Temperature Termination case defrost types."

You don't have access to this field through the App so you can't use these options. I filed a bug here

Behind the scenes OS does support all of this though, so you could modify the hvac library with a ReferigerationCase instance with the parameters you need. It is a little advanced but I outlined the process for adding other types of objects here

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answered 2015-03-30 16:32:17 -0500

Dan Briller
139 ●1 ●1

updated 2015-03-30 23:25:59 -0500

I correct my earlier statement - I don't think its the antisweats - I think it is selecting a defrost system over than OffCycle or Hot Gas (w/o temperature termination).

DLB

FYI, I am working in Open Studio. Is the time termination feature part of OS, or do I need to convert the file to E+?