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<font face="Calibri">FYI - <br>
<br>
The EnergyPlus Weather File Converter packaged with the Energy
Plus download includes two methods for performing the
direct/diffuse split: Zhang-Huang and the Perez Split. See the
Energy Plus Auxiliary Programs for more detail:<br>
<br>
<a class="moz-txt-link-freetext" href="http://bigladdersoftware.com/epx/docs/8-6/auxiliary-programs/definitions-file-custom-file-processing.html#custom-file-processing---solar-radiation-value-calculation">http://bigladdersoftware.com/epx/docs/8-6/auxiliary-programs/definitions-file-custom-file-processing.html#custom-file-processing---solar-radiation-value-calculation</a><br>
<br>
I've recently successfully used this tool to generate an EPW given
only hourly global horizontal (plus the necessary non-solar
measurements). One bug I would mention - for the 'Custom File
Processing' option, it only seems to accept space delimited files
- even if you specify otherwise in the Definitions file...<br>
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- Luke <br>
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<p>--<br>
Lukas Hovee, P.E.</p>
<strong>360 Analytics</strong><br>
Building Energy Analysis Consultants<br>
<font size="2.5">mail: 710 2nd Ave, Suite 925, Seattle, WA
98104</font><br>
<font size="2.5">office: 206.557.4732 x 202</font><br>
<font size="2.5">cell: 206.909.0106</font><br>
<font size="2.5">web: <a class="moz-txt-link-abbreviated" href="http://www.360-Analytics.com">www.360-Analytics.com</a></font><br>
<strong>** We've moved! Please note our new address above.</strong><br>
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