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

[David Bradley]

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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-- 
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Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      2916 Marketplace Drive - Suite 104 
Partner                            Madison, WI 53719 
                                   USA
P: +1.608.274.2577 
F: +1.608.278.1475
E-mail: bradley at tess-inc.com 
Web Pages:  http://www.tess-inc.com    and      http://www.trnsys.com

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