[EnergyPlus_Support] RE: Thermal Comfort Issues

["Morss, Greg" <gmorss@xxxxxxxx>]

Thanks for the help.  I have tried using the ZoneControl:Thermostatic:OperativeTemperature but with no real visible success.  Any suggestions on where to check if it is impacting the comfort properly?  Also what Humidity Ratio is referenced in the thermal comfort calculations?  If its from the Sizing:System is it Preheat or Central?  Or is it outside the sizing object?  Thanks again

 

Greg Morss

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From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, Brent
Sent: Thursday, July 22, 2010 10:33 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] RE: Thermal Comfort Issues

 

It is reporting right. The basic issue is radiant temperatures cause discomfort and it is a real phenomenon.  Modelers and others usually focus on ensuring that drybulb air temperature setpoints are being met (or at least not being missed more than 300 hours a year) and these Standard 55 comfort results are often ignored.  Obviously if you are trying to design for comfort then pay attention to comfort results.  Tightening up the thermostat deadband can help decrease Standard 55 hours, but it depends on the thermal envelope. There are also ways to model control of HVAC based directly on comfort -- see for example ZoneControl:Thermostatic:OperativeTemperature or ZoneControl:Thermostat:ThermalComfort

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From: EnergyPlus_Support@yahoogroups.com [mailto:EnergyPlus_Support@yahoogroups.com] On Behalf Of Morss, Greg
Sent: Thursday, July 22, 2010 11:20 AM
To: EnergyPlus_Support@yahoogroups.com
Subject: [EnergyPlus_Support] Thermal Comfort Issues

 

Hello,  I have been trying to find out how much I should worry about "Time Not Comfortable Based on Simple ASHRAE 55-2004".  I ran a simulation and came back with different numbers of hours, so I looked at the example files and most I have looked at come back with Hours in this category.  So is this an issue?  Is it really not comfortable or is this not reporting right?  Or should I just ignore it?  Please let me know, thanks.

Greg Morss

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