Re: [EnergyPlus_Support] SolarRadiation - further question

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

The thermal comfort MRT is only based on surface temperatures with an 
 optional contribution from high-temp radiant heat. There is no 
direct solar component in the MRT.

Mike

On 3 Dec 2002, at 13:11, Han Yan wrote:

> I have a question related to solar radiation too.
> 
> In predicting comfort such as PMV and two node model,
> will EnergyPlus count the solar radiation into MRT if
> sun is present and the zone has exterior windows?
> 
> 
> Hannah
> 
> --- Linda Lawrie <linda@xxxxxxxxxx> wrote:
> > At 10:32 AM 12/3/2002, Alexander Beisteiner wrote:
> > >Looking at the variable report of the direct and
> > diffuse solar radiation, 
> > >I found that the period of solar radiation is
> > steadily reduced in the 
> > >variable report. In other words, my weather file
> > specifies a direct and 
> > >diffuse radiation for the period 5:00 to 19:00 each
> > day. In the variable 
> > >report that period is reduced to 6:00 to 19:00
> > after about 8 month of 
> > >simulation and further to 7:00 to 17:00 after 10
> > month and finally to 9:00 
> > >to 16:00 after 11 month. I wonder if the source
> > code uses these truncated 
> > >periods of radiation or the original from the
> > weather file.
> > 
> > Without seeing your weather file and your idf, I can
> > only guess.  Even if 
> > diffuse and direct are put in the weather file,
> > EnergyPlus does an internal 
> > calculation (based on several factors including
> > latitude, longitude, etc) 
> > to determine when the sun is up.  When the sun is
> > not up, it resets any 
> > values for diffuse and direct to 0.0
> > 
> > In V1.0.3:
> > 
> > a)  Solar interpolation has changed (hopefully for
> > the better)
> > 
> > b)  you will be able to report out the solar
> > altitude, azimuth and hour angle
> > 
> > 
> > Linda
> > 
> > EnergyPlus WebSite: http://www.energyplus.gov
> > Owner: EnergyPlus_Support list
> > Member: EnergyPlus Development Team
> > 
> > 
> 
> 
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