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[TRNSYS-users] Trnsys equations



Good afternoon to all.

I want to write an equation with a division. My problem is that trnsys report me an error saying that the equation has a division by zero.

I put a condition (multiplying for an _expression_) that avoid the division by zero but it doesn’t work.

 

Someone could help me?

 

Thanks to all

 

Inviato da Posta per Windows 10

 

Da: David BRADLEY
Inviato: martedì 3 maggio 2016 15:46
A: TRNSYS users mailing list at OneBuilding.org; freppelw@noirot.fr
Oggetto: Re: [TRNSYS-users] Weather time step

 

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@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@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@tess-inc.com

 

http://www.tess-inc.com

http://www.trnsys.com

 

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