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Re: [EnergyPlus_Support] Help about global horizzontal radiation
FYI
Beam and dissuse can be synthesized with routines such Erbs et al. There is a MS thesis at the ESL with doc and software for doing this by Doug Bronson. All that is required is global horizontal, latitude, longitude, and time of day.
Jeff
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Jeff S. Haberl, Ph.D., P.E.............................jhaberl@xxxxxxxxxxxx
Professor......................................................Office Ph: 979-845-6507
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-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx <EnergyPlus_Support@xxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Wed Dec 07 08:22:13 2005
Subject: Re: [EnergyPlus_Support] Help about global horizzontal radiation
At 02:24 AM 12/7/2005, dademarino wrote:
>-I have measured the global horizontal radiation with a measure
>instrument and I would have to insert it in EPW weather file
>(PALERMO-PUNTARAISI). In the handbook of energyplus it is written
>that such data still is not used for the calculations. I have
>thought that I could divide global horizontal radiation in direct
>normal radiation and diffuse horizzontal radiation. In this way I
>replace these values in EPW weather file.
>Is it correct?Can someone help me?
1) Global Horizontal radiation is not used directly in any of the
EnergyPlus calculations.
2) You can use Global horizontal to derive direct normal and diffuse
horizontal but you would also need some other indications of the sky
than just the value for global horizontal. (i.e. global and diffuse,
global and direct normal or horizontal, global and sky conditions --
along with angle of the sun for hour of the day).
Linda
EnergyPlus WebSite: http://www.energyplus.gov
Owner: EnergyPlus_Support list
Member: EnergyPlus Development Team
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