I need to use a centralized heating pump air to water on my project to heat and cool a radiant floor. However, I only find HP water to water on the HVAC systems. I have HP air to water but only as a zone object.
Is there any way to have a heating pump air to water system?
The air-source heat pump is not yet available in EnergyPlus and thus in OpenStudio. You can follow its integration here.
The WaterHeater:HeatPump is a zonal object but it can be used with external air source, so it may be still interesting depending on your case.
Thanks for the answer! But, how can I link this water heater, as a zone object, to my radiante floors? Do I need to create a HP for each thermal zone?
You can have a plant heat pump water heater or just an outdoor HPWH. See example file HeatPumpWaterHeater.idf and search for
WaterHeater:HeatPump:PumpedCondenser,
PlantHeatPumpWaterHeater,!- Name
WaterHeater:HeatPump:PumpedCondenser,
OutdoorHeatPumpWaterHeater, !- Name
I saw your advice Urado, and it worked... However, when I run the simulation (after solving some errors) the results are blank, is like if my system is offline...
As you can see, theres no Heating or Cooling loads, what am I doing wrong?
I have my system represented as the following pictures
The OS report may be wrong. Did you check the results with Output:Variable ?
Yes. I have the following output variables on: Zone Air System Sensible Cooling Energy; Zone Air System Sensible Heating Energy; Zone Air Temperature; Zone Electric Equipment Electric Energy / Power; Zone Outdoor Air Drybulb Temperature; Zone Thermostat Air Temperature; Zone Thermostat Cooling Setpoint Temperature; Zone Thermostat Heating Setpoint Temperature; Zone Total Internal Total Heating Energy; But, for my case Zone Air Temperature should be enought to give me those values right?
Yes, you should have a different Zone Air Temperature with and without your radiant floor, if your model is correct. I would add the nodes flow and temperature to check HVAC systems. Maybe a sizing problem...
Hi Urado, I forgot to tell, it was a problem with the thermostat, we need to change the thermostat direct on the radiant systems, because they are not affected by the zone thermostat.
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