[esp-r] Re: Insolation through other zones

[paul strachan]

Dear Heiko,

Actually there is a "trick" for doing a more detailed insolation 
analysis for "internal" zones.

For the second zone down, undertake an insolation analysis, then 
manually select the fictitious surface at the top of the zone and 
calculate the insolation distribution. The insolation  distribution for 
direct solar will be calculated (and used in the simulator) as though 
the upper fictitious surface was an external surface.  You can continue 
this for other zones, because ESP-r holds the direct and diffuse 
radiation separately for onward transmission.

This gives a reasonable estimation of the insolation distribution where 
the depth of the zone is not too great, so that the assumption that the 
upper fictitious surface is external is a reasonable approximation. It 
also seems to work satisfactorily on double facades.

Regards
Paul

esp-r at heikowoehrle.de wrote:
> Hello outthere,
>
> is there a way of getting direct radiation from another zone? i'm modelling a
> atrium at the moment with five zones stacked over each other, with fictious
> surfaces between them.
>
> With the normal calculation it looks like only the top zone gets the radiation
> from the glas roof, the other zones only get a diffuse radiation from the top
> zone.
>
> This may be appropirate for vertical glazings but with a horizontal glazing the
> ground zone should receive nearly all radiation on a summer midday.
>
> Is there any solution via the ish-module oder by calculating the
> daylight-factor? I was playing aorund with ish a bit but it looks like it works
> only for single zones with a transparent surface to external an not with
> transparent/fictious surfaces to other zones.
>
> thanks in advance
>
> Heiko Woehrle
>
>
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