[esp-r] Re: Sky view factor & External insolation

[Jon Hand]

A question about shading and about sky view factors.

In the ish module, when the term 'shading' is used it
actually is shading on the outside face of surfaces facing the
outside. If there is some place in the documentation and/or
contextual help that would indicate something else please
let us know so we can correct this.

And the shading in the newist version can calculate both
the direct and diffuse shading. The diffuse shading has
a good idea of how much of the sky is seen from each
surface.

The sky view factor is set globally in the 'context' menu
based on the building/sky/ground settings.

Not sure if I know of an application which calculates sky view
factors direction. Perhaps someone else does.

-Jon Hand

-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk on behalf of Sean C Lu
Sent: Tue 7/22/2008 8:57 PM
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  Sky view factor & External insolation
 
Hi

I am thinking to use Esp-r to simulate the solar performace of shading
device ( for exampe, the shading device integrated with solar collector) .
one of the task is to calculate the  solar radiation received by the surface
of the external shading device.

there are two questions for the calculation of incident radiation :

1 can esp-r calculate the insolation for the external face of surface? (The
shading and insolation program (ish) can only calculate the distribution of
insolation within ZONE ?)


2 as we know, the Incident Radiation of Surface = Unshaded Fraction
* Incident Beam Radiation + Sky View Facter * Incident Diffuse Radiation +
Ground Diffuse Radiation
to calculate the component of diffuse radiation ( the 2rd term)  , the
fraction of Sky View Facter must be known, is there any application can
calculate the SVF? ( it seems that the application of ESPmrt  only calculate
the viewfactors between surfaces within A ZONE)


many thanks for your help.

-- 
Sean Lu
1st floor SRB
School of the Built Environment
The university of Nottingham
NG7 2RD
[m] 0775 144 5367
[O] 0115 84 67260
[e ]laxcl at nottingham.ac.uk

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