[TRNSYS-users] TRNSYS Weather File Construction

[Craig Francis]

Thanks for the suggestion Christian. Where the temperatures are concerned I
was able to get hourly values from the website climate.canada.gc.ca,
however only hourly meteorological data was available. Where solar
radiation is concerned I could only get daily data. My current challenge is
that I need to build a custom weather file for 2019 that is readable by
TRNSYS to validate a model. I know that I can use the Type 9e input in
TRNSYS, and for the meteorological data, it would work perfectly as I have
the hourly data, however I do not have the hourly solar data to feed into
Type 9e. My challenge is to convert this daily solar radiation into hourly
radiation data.

Thanks,
Craig



On Tue, Dec 1, 2020 at 7:01 PM Dr.-Ing. Karl-Christian Rauch i.R. <
rauch-muenster at t-online.de> wrote:

> Hi Craig,
> perhaps you give you a try to look at
> ASHRAE Handbook 1985 Fundamentals (SI-Edition).
> Chapter 26 Table 2 and Table 3. In the text you will find calculation
> examples for generating hourly values out of design dry-bulb temperature
> and mean daily range (see Table 1, Chapter 24), and Chapter 26, Table 3
> (hourly) percentage of the Daily range. This same hourly percentage is also
> used in program NBSLD (NBS, Tamami Kusuda), where you give the dry-bulb
> temp. and the mean daily range in the input data.
>
> Kind regards
> Christian
>
>
> Dr.-Ing. Karl-Christian Rauch i.R.
> Ladestr. 22
> 48324 Sendenhorst
>
>
>
> David BRADLEY via TRNSYS-users <trnsys-users at lists.onebuilding.org>
> schrieb am Di. 1. Dez. 2020 um 22:41:
>
>> Craig,
>>
>>  I would try and find an hourly data file for a location that is near to
>> the RETScreen location. TRNSYS reads half a dozen or so different weather
>> data file syntaxes and there is a data base of Canadian weather in *.epw
>> format that has a pretty extensive site list. There is a component in
>> Trnsys that will generate hourly data based on monthly averages but not one
>> that will do so based on daily data.
>>
>> kind regards,
>>
>>  David
>>
>>
>> On 12/01/2020 11:51, Craig Francis via TRNSYS-users wrote:
>>
>> Hi Everyone:
>> I am new to TRNSYS and looking for a bit of help around constructing a
>> weather file readable by TRNSYS. I have some NASA weather data for a site
>> that I extracted from RETScreen, however these are daily data. Is there
>> anyway to have TRNSYS convert these to say hourly data, or data consistent
>> with the simulation steps?
>> Thanks in advance.
>>
>> Craig
>>
>>
>>
>>
>> _______________________________________________
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>>
>> --
>> ***************************
>> David BRADLEY
>> Principal
>> Thermal Energy Systems Specialists, LLC
>> 3 North Pinckney Street - suite 202
>> Madison, WI  53703 USA
>>
>> P:+1.608.274.2577
>> F:+1.608.278.1475d.bradley at tess-inc.com
>> http://www.tess-inc.comhttp://www.trnsys.com
>>
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>
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