Re: [TRNSYS-users] Weather data

[David BRADLEY <d.bradley@tess-inc.com>]

Siliang and Mohammad,

  I may be misunderstanding what you are doing but if you are patching measured temperature data into an existing "standard" weather data file so that you can use the standard weather file's solar radiation then I would urge being very cautious about this. You can easily end up with very unrealistic data. In summer you could easily end up with the solar saying that the day was very clear but a low temperature coming from a period that was actually quite cloudy during that interval in your actual data.

 It sounds as though you are being careful about replacing both the dry and wet bulb temperatures (as well as RH). If you only replace drybulb temperatures without taking care of wet bulb, dew point, and RH then all the humdity data in the file will be wrong.

kind regards,

 David

On 01/22/2019 03:33, Siliang Yang wrote:

Hi Mohammad,

 

I’ve been using Type15-3 for my model though it is in TRNSYS17.

 

Basically I used Elements (an open source) to modify the variables of the weather data (epw. format) such as WB/DB temperature and RH etc, of which you could easily edit any periods of the year. Then, I imported the modified epw. file into Type15-3 of my TRNSYS model, and it works properly and I’ve validated against the measured weather data as well. I’m not so sure if it is applicable for the case in TRNSYS15, but you might have a try.

 

Hope it helps..

 

 

Best regards,

Siliang

 

 

Siliang Yang

PhD Candidate and Casual Academic, UNSW Built Environment

Room 6007, Red Centre West Wing

 

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From: TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org> On Behalf Of Mohammad Rezvanpour via TRNSYS-users
Sent: Tuesday, 22 January 2019 6:43 PM
To: TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org>; David BRADLEY <d.bradley@tess-inc.com>
Cc: Mohammad Rezvanpour <moh.rzv@gmail.com>
Subject: [TRNSYS-users] Weather data

 

Dear all,

I want to simulate a photovoltaic panel, and I need weather data for Nov-Dec 2018. However, I could not find any TYPE to enter temperatures there or use updated data. It should be noted that my TRNSYS version is 15. 
How can I have updated temperature data or simply put the temperatures manually which I got from the Internet? 

Best,
Mohammad   

 

--

Regards.

 

M.Sc. student of Energy and Environmental Engineering at University of Tehran

 

Hand-Phone: +989303037373
University Email account: m.rezvanpour@ut.ac.ir 

 

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