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Re: [TRNSYS-users] trnsys ashrare standard test 140-2007

Nalin,
 I am not sure what the problem might be. We have taken TRNSYS through the ASHRAE Standard 140 a few times although we have never published a set of official results. TRNSYS is a bit lower than some other programs on cooling but it definitely falls within the range of acceptability defined by the standard. We did publish two papers about the effort:

Experiences with and Interpretations of Standard Test Methods of Building Energy Analysis Tools
Converging on a Recommended Set of Interpretations and Assumptions in Applying Standard Tests to Energy Analysis Tools

both are available on our website: http://www.tess-inc.com/pubs.

Kind regards,
 David


NALIN SWAROOP wrote: 
Hello all

I am trying to verify trnsys using the cases given in the ashrae standard
but i am not being able to get the results, my peak values of cooling and
heating loads are matching but total annual load values are way off(my
cooling load is coming less than heating load)whereas it should be higher
i have modeled the file accordingly as given in the ashrae test, modeled
the window in windows 5 and taken all the same values but still the values
are not matching.
i think the error is coming beacause in the ashrae instructions it says
that the thermostat is non proportional with dual setback,i dont know
where is this option in trnsys,all i have done is define heating and
cooling in trnbuild and  just give the power for both to be unlimited and
set temp off 20 and 27 deg.

Also i have attached one result(case 600) which compares 6 days i am not
able to understand why in the 1st two days the cooling load is so less and
suddenly it rises although all other conditions are similar i think
beacuse of this problem my cooling loads are very less

also can i get trnsys files for all the cases
please reply soon

TIA
sincerly

Nalin




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