[Equest-users] The problem of minimum equipment efficiency requirement of Ashrae 90.1-2007

[Julien Marrec]

Hey,

He's saying that you need to make sure that the curve boiler-fPLR gives you a constant efficiency. As far as I remember, the default atmospheric curve from equest is like this.
Don't be confused by "flat". A flat efficiency curve is when you plot efficiency=f(PLR). In equest, it should be a curve that is y=x

Look at the curve you used.

Best,
Julien

Envoyé de mon iPhone

> Le 24 mai 2015 à 11:27, "赵永青" <503271081 at qq.com> a écrit :
> 
> I get the energy model comments from LEED reviewer as following:
> 
> The narrative response indicates that the Baseline boiler has been modeled utilizing operating performance curves and a boiler HIR of 1.25. However, since the boiler operation HIR is based on the performance curves, the HIR is less than 1.25 in the part-load condition, which is inappropriate. Revise the Baseline boilers to include a flat efficiency of 80% for all part-loads. Provide eQuest input files or screen shots verifying the boiler efficiency has been modeled as required.
>  <545E22AD at FA528147.9F996155>
> However, I can not understand it very much. The minimum equipment efficiency requirement(80 % Et) of Ashrae 90.1-2007 should be base on full load condition.Why the LEED reviewer raise such a question?Any insight is appreciate!!
> 
> Thanks
> ------------------
> Yongqing Zhao
> Changsha Green Building & Energy Saving Technology CO.,LTD
> NO.438,Shaoshan Road,Changsha,Hunan,China
> Telephone:13574805636
> Email:zhaoyongqing1987 at 126.com
>          503271081 at qq.com 
>  
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