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Re: [EnergyPlus_Support] PTHP dehumidification

  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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