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Re: [EnergyPlus_Support] AirTerminal:SingleDuct:VAV:NoReheat

Sounds like you need to include a heating coil in the air loop when using AirTerrminal:Singleduct:VAV:NoReheat. I you already have one then you are not controlling it correctly or the zone loads are so diverse that some will wind up below 20C. This can sometimes be corrected by balancing the air loop flow rates to each zone (i.e., giving more flow to colder zones and less flow to warmer zones).

The supply air reset schedule is used to minimize heating energy in winter. If you kept the same cold supply air temperature all year around, the heating coils would have to work harder in the winter.

On 3/24/2011 5:47 AM, vieira.jose99 wrote:


I have set up everything, but I want the mean air temperature to be in between 20 and 25ºC. But this does not happen. I have the thermostats configured to be 20/25ºC.
The mean air temperature just stays a few degrees above the outside air temperature.
I have the coils, boiler and chiller on autosize.

When I configure the same setup to AirTerminal:SingleDuct:VAV:Reheat with reheat coils on autosize, I get it to be in between 20 and 25ºC.

Any advice?

Also....can someone explain what is the "Seasonal Reset Supply Air Temp Sch" for? I have read the inputoutput, but still cannot understand the basics of this schedule.


Richard A. Raustad
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