There are several additional comfort
models that are more complex than the basic Standard 55 limits. These are
accessed through the People object and have various report variables associated
with them. Examining time series results such as Fanger PMV and operative
temperature can be more informative than the summary of hours not met.
The humidity ratio used here is the result
calculated for zone air conditions. E+ modeling addresses moist air conditions
in a fairly thorough manner.
From:
Sent: Thursday, July 22, 2010
12:36 PM
To:
Subject: [EnergyPlus_Support] RE:
Thermal Comfort Issues
Thanks for the help. I have tried
using the ZoneControl:
Greg Morss
From:
Sent: Thursday, July 22, 2010
10:33 AM
To:
Subject: [EnergyPlus_
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:
From:
Sent: Thursday, July 22, 2010
11:20 AM
To:
Subject: [EnergyPlus_
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.
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