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Re: [TRNSYS-users] Overall heat transfer values of walls
The reference U-value is calculated with standard convective heat transfer coefficient. So it you change this coefficient, the U-value changes while calculating, but the indicated value stays the same (but it doesn't calculates with this value)
The standard values are: inside: 7,7 outside: 25 (radiation coefficient included)
Kind regards,
Mariëlle
Van: a8304506@graduate.hku.hk [mailto:a8304506@graduate.hku.hk]
Verzonden: woensdag 29 september 2010 2:26
Aan: Trnsys discussion group
Onderwerp: [TRNSYS-users] Overall heat transfer values of walls
Hello, everyone.
When I edit a wall type in Type56, there is a u-value indicated with the remark
"for reference only". What is the meaning for this u-value? It seems that
this figure does not change even if I use different values for the convective
heat transfer coefficient for the wall. If I want to know the actual overall
heat transfer of the wall, how can I find it? Please advise. Thank you!
Best Regards
LEE, Chun Kwong
Division of Building Scienece and Technology
City University of Hong Kong