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Re: [EnergyPlus_Support] Leed Points For Residential High Rise Buildings



Ned,
Do you know what your part-load performance looks like?  Is it a fair representation for both Baseline and Proposed?
Similar checks for pump energy? DOAS efficiency?

On Tue, Nov 4, 2014 at 1:24 PM, 'Edward G. Lyon' eglyon@xxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
 

I am looking for a reality check from some experienced modelers.  We have been running Leed checks on some proposed high rise residential buildings.  The base buildings must have PTACs and hot water coils.  The proposed building would like to use WSHP.  Our findings are that WSHP alone will not generate any credits (actually costs more).  It appears that any efficiency in unit equipment and energy exchange is lost in the water loop pumping, cooling tower operation and compressor operation for heating.  Larger windows with poorer SHGC in the proposed doesnâ??t help either.  Is this similar to other peopleâ??s experience? Or are we missing something that could save the day?  Are more efficient PTACs (and smaller, better windows) the only way to go?

 

Thanks in advance?as Iâ??ve said beforre, I seldom model actual mechanical systems in the work I do with EnergyPlus.

 

Ned Lyon, P.E. (MA, WV)
Staff Consultant

SIMPSON GUMPERTZ & HEGER 
     | Engineering of Structures and Building Enclosures

41 Seyon Street, Bldg. 1, Suite 500
Waltham, MA 02453

781.907.9000 main
781.907.9350 direct 
617.285.2162 mobile 
781.907.9009 fax
www.sgh.com




--

 

James V Dirkes II, PE, BEMP, LEED AP
The Building Performance Team
1631 Acacia Drive, Grand Rapids, MI 49504
(M) 616 450 8653

The more one does what is good, the freer one becomes. There is no true freedom except in the service of what is good and just.



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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>


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