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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Motor Power

Omar Elrawy

Green Building Consultant | Researcher

GreenA Consultants

LEEDuser Basic Member

38 thumbs up

August 26, 2014

Dear All, For modelling pumps for my Proposed design, I have a manufacturer's datasheet for a Variable speed pump (Secondary pump) with the following values: Duty Flow = 209.5 gpm Duty Head = 50 ft Motor Size = 5.5 KW KWa @Design = 3 KW BHP/pump = 3 KW while the constant speed pump (primary) have the following values: Duty Flow = 209.5 gpm Duty Head = 35 ft Motor Size = 2.2 KW KWa @Design = 1.73 KW Now for calculating the W/gpm, should I use KW@Design/Duty Flow, or Motor Size/Duty Flow? And, Should I enter the Duty Head to the Energy Model, or leave it auto? Thanks

Post a reply

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 08/26/2014 - 13:34

Use the KW@Design and duty head. Always model the Proposed as designed (well not always but almost always).

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