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Re: [EnergyPlus_Support] PTHP dehumidification

  Regarding water-based air handlers doing dehumidification, look at 
example file = 5ZoneWaterCooled_HighRHControl.idf

Note the use of ZoneControl:Humidistat, 
SetpointManager:SingleZone:Humidity:Maximum and Controller:WaterCoil.



On 9/17/2010 8:44 AM, Don Shirey wrote:
>    Which version of EnergyPlus are you using?
>
> Figure 130 in the Input-Output Reference for version 5.0 (latest) is
> "Schematic of the Balanced Flow Desiccant Heat Exchanger"... not
> Packaged Terminal Heat Pump.
>
>
>
> On 9/17/2010 12:29 AM, mark.carey@xxxxxxxxxxxxx wrote:
>> Apologies if this arrives twice - posting from the web interface and original post isnt shwing up.
>>
>> Simulating a building to get comparitive energy consumptions for with and without humidity control.
>>
>> Humidification using a Humidifier:Steam:electric appears straightforward.
>>
>> Have a model working with PHTPs giving results for temperature.  IO ref Figure 130 implies that a PTHP will do dehum (cooling coil before heating coil) however it only takes a Thermostat input.  IO ref page 1198 suggests that if a ZoneControl:Humidistat is added and if my equipiment is capable of dehumidifying it will (however ESO output shows uncontrolled RH within the zone).  Has anyone had any sucess getting a PTHP to dehumidify?
>>
>> It doesnt appear to be possible to take the expanded idf from the PTHP and change the controller as there does not appear to be a suitable controller that will operate with RH priority driving the cooling coil and then use the reheat coil to maintain space temperture (as would be the case practically with a water based air handler with cooling and heating coils).  What controller type have people had sucess using with water based air handlers doing dehum?
>>
>> Any suggestions greatly appreciated.



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