Re: [TRNSYS-users] Differential equation algorithm

["Danny Jonas" <jonasd@fh-trier.de>]

Thanks for your answer.

Is there any way to find out which types require the solution of numerical Diff. eq's? Like a short list or something in the manual?

Best Regards,

Danny



-----Ursprüngliche Nachricht-----
Von: Jeff Thornton [mailto:thornton@tess-inc.com] 
Gesendet: Donnerstag, 20. Januar 2011 19:26
An: Danny Jonas; trnsys-users@cae.wisc.edu
Betreff: Re: [TRNSYS-users] Differential equation algorithm

<Dear TRNSYS users, there are three numerical integration algorithm to solve differential equations: -Modified-Euler method-Non-self-starting Heun’s method-Fourth-order Adams method I know the algorithms but I don’t have any experience in using these methods in TRNSYS anddon’t know which algorithm should be used e.g. for SDHW systems. Can anybody give me an advice in which case I should use the different methods?If possible, please tell me a page in the TRNSYS 17 manuals to quote, because I needa reference in my bachelor thesis.>

If you're using the standard models in TRNSYS, or even the TESS Solar Components, the differential equations method doesn't matter as we're not solving the differential equations numerically - we're solving them analytically.  Very few models in TRNSYS require the solution of numerical Diff eq's.

Jeff


Jeff Thornton
President - TESS, LLC

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