How could I model multi-functional Heat Pump and a Ground Water Exchanger?

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Hi,

If I understand you correctly you have a heat pump that is connected to a ground water system. We are modelling one of these in EnergyPlus right now. Firstly we use the watertowater:heatpump:equationfit objects for the heating coils and cooling coils in the AHU. These go straight on to the condensor loop bypassing any plant loop creation. We have one condensor loop and connect both the cooling HP and the heating HP to them.

I think you might also be able to do this directly in OpenStudio, but I am not completely sure on that. I know you can definitely do this in the idf.

I hope that helps.

Annie

You may want to investigate the E+ objects CentralHeatPumpSystem and ChillerHeaterPerformance:Electric:EIR. This is a centralized system of modular water-to-water heat pumps that can provide simultaneous heating and cooling as well as use a source/sink loop to provide additional heating or cooling if the simultaneous load is met. The source/sink (condenser) loop can be a vertical ground coupled heat exchanger as you described, or other.

There are two E+ example files that can give you an idea of the components and setup:

CentralChillerHeaterSystemCoolingHeating.idf

CentralChillerHeaterSystemSimultaneousCooling_Heating.idf

Below is a diagram of the system from the EnergyPlus Input-Output Referene.