[Equest-users] 回复： Cooling EIR and Supply Fan Energy broken downfor PVAV w/ PFP (System 6)

[冷面寒枪]

a 10.0 EER packaged DX unit with efficiencies entered in the wizard is shown in the detailed interface with a cooling-only EIR of 0.2878  ,but in your SV-A report ,cooling EIR is 0.310(EIR=11.0<11.86),larger than 0.2878 (EER = 11.86) in eQUEST detail interface.So the GBCI reviewer think your calculation is not correct.



------------------ 原始邮件 ------------------
发件人: "Ting Wang"; 
发送时间: 2013年5月27日(星期一) 下午4:35
收件人: "equest-users"; 
主题: Re: [Equest-users] Cooling EIR and Supply Fan Energy broken downfor PVAV w/ PFP (System 6)



Sorry, the screen cap was's very clear.





 
On Mon, May 27, 2013 at 4:30 PM, Ting Wang <wangting.ioz at gmail.com> wrote:
 Dear eQuest folks,

The following comment turned up twice in the preliminary and final design phase review. 

 
The SV-A reports indicates that the cooling efficiencies for the HVAC systems were not correctly reflected in the Baseline model and the supply fan energy has not been broken out as required. The response narrative to the Preliminary Review comment number 1 indicates that the cooling efficiencies were recalculated and then entered in the Wizard; however as stated in the Preliminary Review, eQUEST performs this step automatically between the wizard and detailed interface (for example, a 10.0 EER packaged DX unit with efficiencies entered in the wizard is shown in the detailed interface with a cooling-only EIR of 0.2878 (EER = 11.86)) Section G3.1.2.1 requires that where efficiency ratings, such as EER and COP, include fan energy, the descriptor shall be broken down into its components so that supply fan energy can be modeled separately. Note that the cooling efficiency without the fan power is typically rated higher than when the fan power is included as a component in the rated efficiency If appealing this prerequisite, revise the Baseline model so that fans have been broken out separately from the cooling EIR indicates in the SV-A report. 



I attach the sample SV-A and SV-B report below. I modeled this type 6 baseline system using a PIU, which, based on my digging in the archived mailing list, is the closest way to model a VAV system with PFP boxes. The cooling EIR was automatically generated in eQuest assuming the supply fan energy (ARI 340/360) was subtracted from EER 10. Actually, in the previous comment response, I calculated cooling EIR using two approaches found in the archived mails (ARI and non-ARI conditions). But our reviews tended to neglect the narratives and focus on how to confirm the supply fan energy has  been broken out per G3.1.2.1, although the SV-B report already showed the modeled PFan.
 


 
Any ideas on what additional proof documents I need to provide to meet the reviewer's requirements?
 
Thanks
-- 
王 亭
Ting Wang / Environment ConsultantBEIJING EVENDESIGN LTD.
 T: +86 10 8776 5074 - 801
 M: +86 13910854291
E: wangting.ioz at gmail.com
 



 




-- 
王 亭
Ting Wang / Environment ConsultantBEIJING EVENDESIGN LTD.
T: +86 10 8776 5074 - 801
 M: +86 13910854291
E: wangting.ioz at gmail.com
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