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RE: [EnergyPlus_Support] Fanger Comfort
Yes, the Fanger Calculations have been compared to ASHRAE Comfort Tool
and Appendix D of ASHRAE Standard 55.
The most common problems I see in EnergyPlus runs that seem to show poor
PMV results are the following:
1. the HVAC system is missing or isn't actually controlling zone
conditions as expected
2. wrong or poor values for the schedules for activity level, air
velocity, or clo
3. the relative humidity can come out unusually low in the winter.
4. the heat balance model does a good job of predicting inside face
surface temperatures, but this can lead to some surprising results in
PMV that stem from the radiant temperature terms.
I find the following input object helpful for such issues.
Report:Table:Monthly,
Occupant Comfort Data Summary, !- Name
3, !- DigitsAfterDecimal
People Number of Occupants, !- VariableOrMeterName01
HoursNonZero, !- AggregationType01
Zone/Sys Air Temperature, !- VariableOrMeterName02
SumOrAverageDuringHoursShown, !- AggregationType02
Zone Air Relative Humidity, !- VariableOrMeterName03
SumOrAverageDuringHoursShown, !- AggregationType03
ThermalComfortMRT,
SumOrAverageDuringHoursShown, !- AggregationType03
Time Not Comfortable Summer Or Winter Clothes,
SumOrAverageDuringHoursShown,
FANGERPMV, !- VariableOrMeterName04
SumOrAverageDuringHoursShown; !- AggregationType04
________________________________
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ian Doebber
Sent: Friday, October 20, 2006 2:24 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Fanger Comfort
Has the Fanger comfort model been fixed in the V1.3 release and compares
to the calculation from the ASHRAE Comfort model. This was an error
that was highlighted months ago. Let me know.
Thanks in advance
Ian Doebber
Graduate Mechanical Engineer
Arup
901 Market Street Suite 260 San Francisco CA 94103
tel: 415-946-0292
fax: 415-957-9096
cell: 415-613-4314
ian.doebber@xxxxxxxx <mailto:ian.doebber%40arup.com>
www.arup.com
________________________________
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com>
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com> ] On Behalf Of Michael J.
Witte
Sent: Thursday, October 19, 2006 11:38 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com>
Subject: RE: [EnergyPlus_Support] Further Insight : Skylight / Radiant
Cooling Strange Behavior
Ian:
If you delete the skylights, does the cooling load on the radiant system
change
by the same order of magnitude as the reported heat gain from the
skylights? I
suspect this may just be a problem with the reported window heat gain
rather
than a real heat balance problem. The reported window heat gain is just
a side
calculation for reporting purposes, that value is not actually used in
the heat
balance.
Mike
On 15 Oct 2006 at 15:42, Linda Lawrie wrote:
> At 04:27 PM 10/13/2006, Griffith, Brent wrote:
> >I believe this is a known bug (CR6897). But unfortunately it isn't a
> >quick job and I don't think it was fixed in V1.4 (which is already
out).
>
> As Brent says, this is a known or suspected problem. If you submit
> your file (either send direct to me or upload to the support web
> site), it may help our developer in tracking it down.
>
>
> Linda
>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx <mailto:EnergyPlus-Support%40gard.com>
<mailto:EnergyPlus-Support%40gard.com>
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