Re: [EnergyPlus_Support] Simple HVAC model with Fan:OnOFF

[Don Shirey <shirey@xxxxxxxxxxxx>]

FurnaceWithDXSystem.idf  is a 3-zone model... but you could reduce it to 
one zone.

> Look at example file FurnaceWithDXSystem.idf and see if this meets 
> your needs.
>
> With a direct expansion cooling coil, supply air conditions will vary 
> slightly based on the entering air conditions.
>
> daveurja wrote:
>> I generathe idf file using EnergyPlus Example File Generator. 
>> Apparantly it is setup such that supply fan is modeled as a constant 
>> volume fan. In residential buildings the fan turns on/off as per 
>> demand. So I changed the fan type from Fan:ConstantVolume to 
>> Fan:OnOff. But I got fatal effor due to a Severe  error ** Invalid 
>> Air Loop Component Type = "FAN:ONOFF". What might be the reason?
>> Is there an example idf file with simple HVAC system(one fan, one 
>> cooling coil, one heating coil and one zone) where fan turns on/off 
>> as per demand and supply air temperature is fixed for heating and 
>> cooling mode?
>>
>> Thank you for your help.
>>
>> Dave


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