OpenStudio / EnergyPlus Support for Refrigeration Heat Reclaim from Transcritical Gas Coolers

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Hi everyone,

I’m modeling space heating heat reclaim savings in OpenStudio for a supermarket with transcritical refrigeration and running into a limitation I wanted to check with the group.

For non‑transcritical systems, I’ve successfully used OS:Coil:Heating:Desuperheater with OS:Refrigeration:GasCooler:AirCooled as the heating source. That approach is working as expected.

For the transcritical systems, OS:Refrigeration:GasCooler:AirCooled is now my heating source, but this setting is not sticking as the heating source for the desuperheater coil. Based on the EnergyPlus I/O Reference, it looks like Refrigeration:GasCooler:AirCooled objects aren’t valid heating sources for desuperheater coils.

Has anyone found a workaround to successfully model transcritical refrigeration heat reclaim in EnergyPlus / OpenStudio? Alternatively, is anyone aware of planned development to support gas coolers as valid heat sources for desuperheater coils in future versions?

Docs for reference:

link:EnergyPlus I/O Reference for Coil:Heating:Desuperheater - Heating Source Object Type

Any ideas would be greatly appreciated. Thanks!