Variable heating/cooling capacity limits?

asked 2019-02-27 14:29:09 -0600

MiguelPereira
67 ●3

updated 2019-02-27 16:49:35 -0600

shorowit

11891 ●201 ●9 https://www.nrel.gov/b...

I have been using the IdealLoadsAirSystem to model heating and cooling of a building. My question Is, is it possible to limit heating/cooling capacity only during certain periods of the simulation?

Specifically, I am trying to limit capacity during weekends, while keeping it unlimited during weekdays. Since the IdealLoadsAirSystem only has one parameter for heating/cooling capacity and it seems to be a fixed value for the whole simulation, and since I can't, to my knowledge, assign more than one IdealLoadsAirSystem object to the same zone, what would be the best way to accomplish what I am trying to do?

answered 2019-02-27 16:49:06 -0600

shorowit

11891 ●201 ●9 https://www.nrel.gov/b...

While I haven't tested it, you can assign multiple of any ZoneHVAC system (including ZoneHVAC:IdealLoadsAirSystem) to a thermal zone. You should be able to set availability schedules for each IdealLoadsAirSystem such that the one with unlimited capacity is only available on the weekdays and the other with limited capacity is only available on the weekends. You'll also want the ZoneHVAC:EquipmentList to list both pieces of equipment and can use the SequentialLoad load distribution scheme.

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I have been using HVACTemplate:Zone:IdealLoadsAirSystem, not the actual ZoneHVAC:IdealLoadsAirSystem object. I believe this prevents me from using the ZoneHVAC:EquipmentList, which I believe is why I'm having trouble getting both the weekend and weekday systems to work without errors.

Is there a way to keep using HVACTemplates here, or do I have to transition away from the Templates, and start using the actual ZoneHVAC:IdealLoadsAirSystem, with the additional required inputs?

MiguelPereira ( 2019-06-14 11:01:15 -0600 )edit

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Variable heating/cooling capacity limits?