[esp-r] Re: Time:var graph for solar at ext face surf

[Jon Hand]

Solar radiation calculations are handled in src/esrubld/solar.F  The variable
for absorbed solar radiation on an external surface (QSOLE) is calculated near line
957 of this file.   The good news is that the 'trace' reporting for solar calculations
includes the current direct and diffuse solar picked up from the weather file
as well as the intermediate calculations which could assist you in your research.
You can turn on the trace facilities via a menu option in the simulator.

Of course, ESP-r being open source allows you to single step through the code
to explore just how the simulator is dealing with solar issues in your model ;-)

Regards, Jon Hand

________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] On Behalf Of Achim Geissler [achim.geissler at intergga.ch]
Sent: 01 March 2013 20:15
To: l.lars
Cc: esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: Time:var graph for solar at ext face surf

Hi Lars

I am not sure if you will get direct and diffuse separately via res (I think not). Anyway, in < tabular output, performance metrics, time step reports, surface flux > you find <sw rad incid (other face)> which, as far as I recall, is total short wave (aka solar) radiation on the surface of choice.

You can also try xml output, however I am not sure that this gives out direct and diffuse components separately, either (in the official version). Of course, you could also monitor a north faced (for locations in the northern hemisphere, that is) surface to get an idea of the diffuse component.

Sorry I don't have any more ideas. Maybe someone else will chip in.

Best
Achim


On Mar 1, 2013, at 5:39 PM, l.lars <l.lars at gmx.de> wrote:

> Hello,
> I am looking for a solution to show a time-variable graph for the
> diffuse and direct radiation on an external wall.
> I got a very simple model. It is just a box without any windows, with
> just an inclined roof and some shading bodies.
> Is there a way to get an time-(direct solar radiation on the outside of
> the roof) graph? I just can find in the var.vsvar menu "solar at ext
> face" but nothing in the time-var menue.
> At the end, this should be the import for a pv model. So I need to know
> how much radiation is available on that roof.
>
> Thanks for your help
> Lars
>
>
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> esp-r at lists.strath.ac.uk
> http://lists.strath.ac.uk/mailman/listinfo/esp-r
>

achim.geissler at intergga.ch





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