LEED v3 and Weather Data

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Hi All,

I looked through the archives and I don't see this addressed, so I hope I
didn't miss it. For LEED v3 EAp2 the form asks for the weather file and then
the HDD and CDD source. I used the TMY2 data file for my city in the model
but I can't figure out how to determine the HDD and CDD for this source.
Does anyone know either how to determine the HDD/CDD numbers from equest or
the .bin file, or if the ASHRAE numbers are the same as the TM2 data.

Thanks

____________________________
Michael Shields

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Michael,

Use the ASHRAE HDD & CDD data from the fundamentals handbook. The tables
are in the 2001 paper copy of fundamentals, but I believe you need the
electronic files on the CD for later editions of ASHRAE fundamentals.

Steven

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There is a process you can use with the BIN file, but it is more effort than using the ASHRAE Fundamentals tables Steven referenced. If you use the ASHRAE Fundamentals tables, while you are there you should also make sure you setup your design day keywords in eQuest (under the "Project" information tab) to match ASHRAE as well.

To get the degree days from the bin file, you need to convert the bin file to a text file, import into Excel (clean format), and then manually calculate the degree days from the hourly temperatures either by calculating average daily temp or dividing each days heating/cooling degree-hours by 24. The answers will be different depending on which method you choose.

The directions on converting a bin file to a text file are a bit lengthy but are included in the readme file with the utility at http://doe2.com/download/weather/DOE22WeatherUtilities.ZIP. You'll spend a good deal of time in a text editor (notepad will do fine if you're on a PC).

Jeremy R. Poling, PE, LEED AP+BDC

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Within the zip file Jeremy referenced there is a utility file called
stat.bat. You can use this to extract statistics for the bin file, including
HDD and CDD at various temperatures.

Michael Wilson, P.Eng.

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The zip file contains the weather processor that can extract of the
data from the weather file. It can also be used to change data in
the weather file. See the DOE2.2 Vol. 3, Topics manual, the last
section is "Weather".

There are a number of .bat files, utility scripts, for processing the
weather data.

LSTABIN.BAT lists all 8760 hours of data in the file to a text
file. It contains the monthly and annual summaries as well. This
file side steps having to import the raw text data into an excel spreadsheet.

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Try this

http://bepan.info/weather
6 - Weather 2008-IIT-Seminar
9 - Weather _NCDC.tpe to DOE2.bin to Tables-Charts
11 - Template - Shanghai ? DOE2-Weather-Analysis - Short
12 - Template - Beijing ? DOE2-Weather-Analysis - Long

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Thanks for all the advice. It looks like the easiest way is to just match the design day keywords to the ASHRAE data, but I am not familiar with how to do this. I have only ever changed the weather file. How to do you access the ?Project? tab which has that information?

Thanks,

Michael

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I am not sure if this message is addressed to me.
Open website at http://bepan.info/weather
Double click on items 6, 9, 11 & 12 to open the files and save or "save as" directly to your computer.

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