[esp-r] Re: ESP CFC control sensor definition work around

[Achim Geissler]

Hi Leo

if you are set up to recompile, you should be able to do what you want  
quite easily. The CFC control is defined in esrubld/ 
complex_fenestration.F, subroutine CFC_control (line 3878)

Go to lines 4050 or thereabouts. Based on the rudimentary controls  
defined there, you can most likely implement what you want with little  
problem. Actually, the solrad used for control is dir+diff on the  
incident surface (the one for which the sensor is defined) so should  
already be what you want (although I am not entirely sure that this is  
part of the current release).

Best
Achim


On Mar 4, 2010, at 2:29 PM, Bakker, L.G. (Leo) wrote:

> Dear All,
>
> Try to pick up ESP where I left some decade ago..
>
> We try to compute the effect of different control strategies for a  
> venetian blind system using the CFC module.
>
> We like to compare the following cases
> -          no shading
> -          shading applied if the effective total solar radiation  
> (diff and dir) > 200W/m2
> -          shading applied if the effective total solar radiation  
> (diff and dir) > 350W/m2
> -          manual controlled
>
> It seems I am able to select as sensor: horizontal diffuse or direct  
> radiation (normal or total).
>
> I am just wondering:
> 1-  if there is a way to control based on the total solar radiation  
> on the vertical CFC surface (as would be received by a sensor)?
> 2- if it would be possible to use a temporal file to control the  
> shading
>
> If this is not possible I will manipulate the weather file and  
> define a wind direction of 0 degrees for the cases the shading  
> should be applied and use that as a sensor.
> I will then try to calculate the radiation on the CFC surface using  
> a small 1 by 1 by 1 box with an window with 100 % transmittance and  
> calculate how much solar radiation entered the box.
> I wonder
> 3- if this box approach will work and give me the effective total  
> solar radiation on the surface and
> 4- if there is a simpler alternative for my “weather workaround  
> approach”
>
> Thanks in advance,
>
> Leo Bakker
>
>
> TNO Building and Geosciences
>
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>
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> E          Leo.Bakker at TNO.nl
>
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achim.geissler at intergga.ch




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