[TRNSYS-users] Weather time step

[David BRADLEY]

Wirich,
   I am pretty sure that the dewpoint is calculated each time step based 
on the temperature and humidity that are in the data file. Both 
temperature and humidity are linearly interpolated between hours. The 
values in the data file are average values over the hour.
kind regards,
  David



On 05/03/2016 09:10, freppelw at noirot.fr wrote:
> Thank you David for your reply.
> I also realized that if I choose a time step less than 1 hour, the dew 
> point temperature is approximated between entire hours. I cannot find 
> the calculation rule in the documentation.
> Do you have any idea where I can find it?
>
> Best regards
>
> Wirich
>
>
>
> Le 2016-05-03 15:46, David BRADLEY a écrit :
>> Wirich,
>>   There are two basic Types that can be used to read weather data.
>> Type15 is designed to read files that have a standard format (such as
>> TMY2 or TMY3). Part of the standard format is a 1-hour timestep. If
>> you modify a standard format weather file to have a different time
>> step then it can no longer be read by Type15. Type9 can be used to
>> read general weather data files. However, it does not have the solar
>> radiation processing algorithms built into it as Type15 does. You'll
>> need to use Type16 to process the results that are read by Type9.
>> kind regards,
>>  David
>>
>>
>> On 04/29/2016 09:20, freppelw at noirot.fr wrote:
>>> Hi everyone,
>>>
>>> As you know, the weather file for TRNSYS (TM2) is built with a 1 
>>> hour time step.
>>>
>>> My question is: If I modify the weather file so that I have a time 
>>> step of 1 minute, would TRNSYS be able to execute the simulation? In 
>>> this case, is there a time step value to change in the program or is 
>>> it totally impossible?
>>>
>>> Thanks in advance.
>>>
>>> Wirich
>>> _______________________________________________
>>> TRNSYS-users mailing list
>>> TRNSYS-users at lists.onebuilding.org
>>> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>>>
>>
>> -- 
>> ***************************
>> David BRADLEY
>> Principal
>> Thermal Energy Systems Specialists, LLC
>> 22 North Carroll Street - suite 370
>> Madison, WI  53703 USA
>>
>> P:+1.608.274.2577
>> F:+1.608.278.1475
>> d.bradley at tess-inc.com
>>
>> http://www.tess-inc.com
>> http://www.trnsys.com
>
>

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com