[esp-r] Re: esp-r Digest, Vol 30, Issue 11

[Bart Lomanowski]

Hi Leen,

When solar radiation enters the zone, it is distributed according to  
the solar distribution specified in Zone Geometry-> g solar  
distribution.

Solar radiation which enters the zone has direct and diffuse  
components. By default 'diffuse radiation distribution' is selected  
for which the direct component is lumped with the diffuse component.  
The radiation is distributed to each internal surface based on area  
weighting and absorptance.

You can also specify 1 or 2 insolated surfaces to which all the direct  
(beam) solar radiation will be directed. The diffuse component is  
always distributed to all zone surfaces by area  and absorptance.

In the case of an internal window, there is an approximate algorithm  
which processes the incident radiation on the window and calculates  
the reflected, absorbed and (re)transmitted (to adjacent zone or back  
outside) components.

The ish module also provides a more accurate treatment of direct solar  
radiation distribution based on monthly solar position. The insolation  
data  along with obstructions shading data is stored in a file *.shd.  
You can run the ish module from Zones Composition->f shading &  
insolation.

Hope that helps,
Bart

---
Bartosz Lomanowski
Solar Thermal Research Lab
Department of Mechanical Engineering
University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
+1 519 888 4567 x33885