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
From:
Sent: Thursday, July 22, 2010
11:20 AM
To:
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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