[Equest-users] Would like to hear from you guys

[Bobby Sy]

Is the central utility plant serving other buildings other than LEED
candidate building? If it is, then the energy modeler should use the
guidelines for district cooling / heating which will require him to add
chilled water meter on both models then I believe the pump type including
the chiller specifications would not matter in the energy  model anymore.

You may search in the archive about modeling system with district cooling /
heating and "Treatment of District or Campus Thermal Energy in LEED V2 and
LEED 2009 - Design & Construction."
Hope that helps.

-Bob
On Thu, Sep 13, 2012 at 2:25 AM, Yazan Abukhait <yazan142us at gmail.com>wrote:

> Dear all,
>
> I'm involved in a LEED project where my company have hired a LEED
> consultant, among the buildings is an office building consisting of 6
> stories, being fed from a central utility plant located within the project,
> the base line is the same that of the proposed building ( system 8) except
> that the VAV boxes are fan powered in the baseline. The mechanical engineer
> modeling the project is insisting that he can show a minimum of 10% energy
> savings by using variable speed pumps and AHUs and heat recovery, I believe
> the heat recovery part, but using variable speed pumps and fans should also
> being modeled for the baseline as well, isn't it the case? ASHRAE 90.1-2007
> will not allow you to use constant speed pumps for pumps and fans even when
> you use the LEED supplemental document for district cooling plants
> treatment, would like to hear from you guys, and thanks in advance.
>
> Regards
>
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