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I recently used the following configuration for a large hotel project with a similar design. The design called for a condenser loop providing HHW and CCW from boilers and fluid coolers to terminal WSHPs. The service hot water was heated by the condenser loop through a HX and storage tank system.

I added a HX to the demand side of the condenser loop (not shown) and then added the same HX to the supply side of the SHW loop. I also ended up simplifying the model by removing the WaterHeater:Mixed object. However, I did test the HX and WaterHeater:Mixed configuration and it also worked.

WSHP Loop

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I recently used the following configuration for a large hotel project with a similar design. The design called for a condenser loop providing HHW and CCW from boilers and fluid coolers to terminal WSHPs. The service hot water was heated by the condenser loop through a HX and storage tank system.

I added a HX to the demand side of the condenser loop (not shown) and then added the same HX to the supply side of the SHW loop. I also ended up simplifying the model by removing the WaterHeater:Mixed object. However, I did test the HX and WaterHeater:Mixed configuration and it also worked.

WSHP LoopLoop (HX is on the supply side off the screen)

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SHW Loop

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