Re: [EnergyPlus_Support] Fanger PMV in EnergyPlus off by 0.5 ? (more results)

["Michael J. Witte" <mjwitte@xxxxxxxx>]

Identified error in latent heat from respiration and changed code.  Equation 
now matches ASHRAE Handbook of Fundamentals and Pierce model in EnergyPlus.  
Raises results for PMV by about 0.5 to 0.7 units on ASHRAE sensation scale. 

(Please pardon the double posting - want to complete both threads.)

Mike


On 14 Nov 2003, at 6:05, waspoorboy wrote:

> By increase Activity level from 1met(105W) to 1.2met(125W)
> PMV then offset 0.5, but compare to Fanger's book [Fanger, 1970]
> The value EnergyPlus give is still off by 0.5
> [Human body area assumed 1.8m2]
> ==============================
> #1: Activity level = 1met(105W), RH=50%, Air velocity=0.1m/s 
> Results:
> [Summer] 0.5clo, Tin,air=MRT=24.5C, Fanger PMV=-0.55
> [Winter] 0.9clo, Tin,air=MRT=22.0C, Fanger PMV=-0.49
> 
> Fanger's book: page 116 Activity level=60kcal/m2hr=51.2W/m2=0.88met
> clo Temp PMV
> 0.5  24   -0.20
> 0.5  26   +0.39
> Fanger's book: page 117 Activity level=70kcal/m2hr=60.2W/m2=1met
> clo Temp PMV
> 0.5  22   -0.33
> 0.5  24   +0.17
> ==============================
> #2: Activity level = 1.2met(125W), RH=50%, Air velocity=0.1m/s 
> Results:
> [Summer] 0.5clo, Tin,air=MRT=24.5C, Fanger PMV=-0.06
> [Winter] 0.9clo, Tin,air=MRT=22.0C, Fanger PMV=-0.03
> 
> Fanger's book: page 118 Activity level=80kcal/m2hr=68.8W/m2=1.2met
> air velocity = 0.1m/s
> clo Temp PMV
> 0.5  22   -0.03
> 0.5  24   +0.41
> ................<---T=24.5, PMV=0.5
> 0.5  26   +0.85
> ==============================
> #3: Activity level = 1.2met(125W), RH=50%, Air velocity=0.15m/s 
> Results:
> [Summer] 0.5clo, Tin,air=MRT=24.5C, Fanger PMV=-0.205
> [Winter] 0.9clo, Tin,air=MRT=22.0C, Fanger PMV=-0.14
> 
> Fanger's book: page 118 Activity level=80kcal/m2hr=68.8W/m2=1.2met
> air velocity = 0.15m/s
> clo Temp PMV
> 0.5  22   -0.16
> 0.5  24   +0.30
> ................<---T=24.5, PMV=0.4
> 0.5  26   +0.76
> ==============================
> 
> 
> 
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