Question-and-Answer Resource for the Building Energy Modeling Community
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Hi Raghu,
If you have a good idea of what the water temperatures will be year-round, the simplest method is to use a SetpointManager:Scheduled object to control the temperature at the Supply Outlet of your Loop. Then maintain the loop temperature using DistrictHeating and DistrictCooling objects.
If you don't know the actual water temperatures, I would consider using a GroundHeatExchanger:Vertical and oversize it so that heat rejection from the building has little impact on the ground temperatures. There are many factors in implementing this object. Usually building loads are output to separate software (GLD or GLHEPro). This software assists in sizing the borehole design and can provide the g-function pairs required to populate the GroundHeatExchanger:Vertical EnergyPlus object.
For your specific application, I would not use WaterHeater:Mixed. I think this would be too complicated to get it working correctly, and you won't have any more accuracy in your simulation than with my DistrictHeating/Cooling suggestion.
With GroundHeatExchanger:Pond, there are too many unknowns in how the model is implemented for me to suggest trying to push it to operate in a way it was not intended.
Good Luck!
Karen
