Re: [EnergyPlus_Support] Solar radiation components in Bin weather file

Eric,

If measured solar data is available, then by all means you should get it.

However, make sure first that the weather bureau is indeed providing measured

radiation, and not calculating it from other parameters, since recording solar

radiation is not standard operating practice for typical weather stations. If

you can get measured solar, consider yourself very lucky.

The only critical measured radiation values are the global horizontal, and the direct

normal radiation. Everything else can be calculated from these two.

If your weather bureau can provide only the global horizontal, you will need to use

a model to do the direct/diffuse split.

The DOE-2 *.BIN file contains just the global horizontal and direct normal.

I'm surprised you're thinking of creating an EPW and then translating it to BIN.

I've been doing the opposite - create first a "bare bones" *.BIN file, and then

filling out the additional data needed for an EPW.

Joe Huang

White Box Technologies, Inc.

----- Original Message -----

From: eric_zhou1223

To: EnergyPlus_Support@xxxxxxxxxxxxxxx

Sent: Wednesday, December 03, 2008 9:52 PM

Subject: [EnergyPlus_Support] Solar radiation components in Bin weather file

All,

I am planning to buy weather data from weather bureau to create our own
customized epw weather file for a location. Then the epw file will be
changed to bin format for DOE2 use. In epw weather file, included are
Global horizontal Solar Radiation, Direct Normal Radiation, Diffuse
Horizontal Radiation. I would think three items impact on the results.
How about the BIN file? Is it enough to get the Global horizontal Solar
Radiation only for the BIN format?

There are two options for me:
1) Get Global horizontal Solar Radiation data and leave the other two
alone;
2) Buy global horizontal and direct normal radiation. We then calculate
the third one.

Does anyone have any idea of it? Which way is better to go. Any input
is much appreciated.

Eric

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