[Equest-users] Boiler HIR

[Pasha Korber-Gonzalez]

Hi Omer,

based on my recent (cited) example from the Reviewer's comments on the
baseline natural draft boiler...this is what I learned from my model and
experience going through this last week for my review comments...


   - Natural draft boiler should not show any electric energy use; therefore
   the primary equipment efficiency would be an HIR value of 80% or (1/80%) =
   1.25 input value.  The EIR variable in eQuest defaults to something
   relatively small like 0.4% energy use in my recentl model, but the reviewer
   didn't even like to see such a negligible amount of "nothing" in the EIR
   value which resulted in a very small output number listed under the electric
   Spacy Heating end use category.
   - When I "zeroed" out the EIR input variable (default or not) this
   removed all traces of electric space heating associated with my model.
   - Therefore; for your baseline boiler you will need to use HIR = 1.25,
   EIR = 0.0 and then model your proposed boiler design as designed so that you
   may take advantage of any furhter potential energy savings if you want.
   -

Does this help you?  Cheers,
Pasha

2011/6/21 Ömer Moltay <omoltay at mimtarch.com>

> Dear All,
>
> I have a simple question. If we need to model natural draft boiler as
> required by G3.1.3.2 with the efficiency of 80% Et as given by Table 6.8.1F,
> does this mean that the HIR value in eQuest needs to be 1.25? Or are there
> some other intricacies that one needs to take into account here?
>
> Thank you for any replies,
>
> Ömer Moltay, LEED AP BD+C, BREEAM Assessor
> Mimta Ltd.
> Hekimsuyu Cad. 559. Sk. No:39
> 34255 Kucukkoy Istanbul Turkey
> Tel: 90-212-617-2296
> Fax: 90-212-617-2297
> www.mimtarch.com
> www.eko-yapi.net
> www.mimtasolar.com
> www.servogas.com
>
>
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