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Re: [TRNSYS-users] TRNSYS help



Prashant,



I am a beginner in the TRNSYS and would be grateful if you help me on following things:
  • How to convert energy plus weather data (.epw) file to TRNSYS type (.tm2) 109 format? Is there a small tool/software available for that? Is there a specific tool (excluding notepad/wordpad) available to edit .tm2 file, so that I can easily copy & paste the weather data?
TRNSYS can read energyplus weather files as well as TMY2 (also various other formats as well). If you are using Trnsys16 you can read energyplus weather files using Type89 and process the radiation data with Type16. If you are using Trnsys17 then Type15 both reads and processes E+ weather files.

*.tm2 files are text. If you obtain the file format (showing which columns in the data file pretain to which values) then you can open the files in Excel and adjust the column delimiters so that editing is easy. The TMY2 file format is described in NREL's TMY2 documentation: http://rredc.nrel.gov/solar/old_data/nsrdb/tmy2/ (click on the "documentation" link.
  • Does TRNSYS gives the end-use energy consumption data e.g. annual/monthly/daily kWh consumed for lighting, equipment, cooling, heating, etc.? I could not find it in the output list of TRNBuild.
Type56's outputs are more generally energy balance outputs (total convective gains to the airnodes of a zone, radiation gains from a particular surface). When I need to give the gains from lighting, equipment, etc. to the space and I also care about the power use of those things then typically, I set up the Type56 gains as inputs to the model and I write equations in the TRNSYS Studio to set the values of the gains at any given point in time. Those same equations also give me the energy consumption of those devices.
  • How to define seasonal schedules e.g. equipment runs 8-10am in the months April-August?
Again it is easiest to do this outside of Type56 and then pass the appropriate values in to Type56 via an input. There are various schedule components available in the add-on TESS Libraries Applications Library. You can also set up a Type14 forcing function for scheduling in standard TRNSYS.
  • How to save schedules in the user library so that they can be used later for other models?  
TRNBuild does not currently have a method for saving schedules for reuse in other projects.

Kind regards,
 david

-- 
***************************
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