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[EnergyPlus_Support] Re: modifying weathr file
Brent,
Thanks for your information. It's very helpful.
Li
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"
<brent_griffith@n...> wrote:
> Li,
>
> Hopefully you have already found the weather information in
AuxiliaryPrograms.pdf.
>
> 1) From your measurements, it is possible to calculate/model all
the needed radiation data. But it can be quite involved and more
suited to research rather than practice. I am not sure exactly
what solar data you have but the Perez All Weather Sky model is
useful for getting to Direct Normal Radiation and Diffuse Horizontal
Radiation. (There exists fortran code from an ASHRAE research
project that implements this model.) Methods for getting to
Horizontal IR Intensity (or Sky Cover if you prefer) are more
obscure; one simple method is by Auer and implemented in TRNSYS
Type69.
>
> 2) If you did manage the above, then Atmospheric Station Pressure
is likely the only data you would have to leave as-is. I don't
believe this would introduce much error as long as the elevations
are similar.
>
> Brent
>
>
> -----Original Message-----
> From: zl21e [mailto:zl21e@y...]
> Sent: Wednesday, June 02, 2004 3:16 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] modifying weathr file
>
>
>
> I am trying to modify the original weather file (.epw) by using
the
> actual local weather data. I can get the following six
parameters'
> data by measurement:outside dry bulb temperature (C), outside
> relative humidity (%), wind direction (deg), wind speed (m/s),
solar
> beam intensity (w/m2), solar normal flux (w/m2).
>
> My questions are:
> 1) Besides dew point temperature, what other parameters in the
> weather file can be calculated based on the six parameters
mentioned
> above?
> 2) For the parameters that can not be calculated, how should I
treat
> them? Can I just keep their original value in the weather file?
>
> Thank you!
>
> Li Zhang
>
>
>
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