Ideal Load Air System

asked 2019-12-11 09:57:01 -0500

Hello Users, I use IDF Editor for my building. I want to add an ZoneHVAC:IdealLoadAirSystem to one of the zones. This system is just for heating. The set temperature in the zone is 21°C. If the outside temperature is over 15°C the heater is off. I know how I have to define the schedules for the set temperature but what is the easiest way to add the shut down temperature of 15°C? Regards, Arne

answered 2019-12-11 10:38:30 -0500

shorowit

10911 ●180 ●9 https://www.nrel.gov/b...

One option is to create an EMS program that actuates the Availability Schedule of the ideal air system. The EMS program should use a calling point that occurs early in the zone timestep, and would set the availability schedule to off or on based on the outdoor drybulb temperature (retrieved via an EMS sensor).

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Thanks for your answer! But is there a way to do that in the IDF Editor, without creating a program?

arnespandau ( 2019-12-11 10:53:34 -0500 )edit

You could pre-process the weather file, find the hours where outside temperature is above 15C, and create a detailed ideal system availability schedule to reflect that.