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The best way, I think, would be to assemble a Unitary System with Desuperheater coil as supplementary heat. Try adding this your your library files and dragging into your airloop Unitary-DX-Electric_w_Hotgas-Reheat

The OpenStudio App does not recognize the desuperheater as a child of the cooling coil, so adding from the library breaks the link between cooling coil and desuperheater. To fix, once you have inserted into your model's Airloop, you will have to edit the osm file at the object OS:Coil:Heating:Desuperheater field !- Heating Source Name; add the UUID for the cooling coil of the new AirLoopHVAC:UnitarySystem (field !- Cooling Coil Name).

The best way, I think, would be to assemble a Unitary System with Desuperheater coil as supplementary heat. Try adding this your your library files and dragging into your airloop Unitary-DX-Electric_w_Hotgas-Reheat

The OpenStudio App does not recognize the desuperheater as a child of the cooling coil, so adding from the library breaks the link between cooling coil and desuperheater. To fix, once you have inserted into your model's Airloop, you will have to edit the osm file at the object OS:Coil:Heating:Desuperheater field !- Heating Source Name; add the UUID for the cooling coil of the new AirLoopHVAC:UnitarySystem (field !- Cooling Coil Name).

Edit: On second thought, this does not appear to function as a true hot gas reheat. Per the Desuperheater documentation it "does not impact the performance of the compressor." This seems to indicate that it strictly only takes advantage of the superheat of the refrigerant.

The best way, I think, would be to assemble a Unitary System with Desuperheater coil as supplementary heat. Try adding this your your library files and dragging into your airloop Unitary-DX-Electric_w_Hotgas-Reheat

The OpenStudio App does not recognize the desuperheater as a child of the cooling coil, so adding from the library breaks the link between cooling coil and desuperheater. To fix, once you have inserted into your model's Airloop, you will have to edit the osm file at the object OS:Coil:Heating:Desuperheater field !- Heating Source Name; add the UUID for the cooling coil of the new AirLoopHVAC:UnitarySystem (field !- Cooling Coil Name).

Edit: On second thought, this does not appear to function as a true hot gas reheat. Per the Desuperheater documentation it "does not impact the performance of the compressor." This seems to indicate that it strictly only takes advantage of the superheat of the refrigerant.