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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Baseline Hot water pump power for Purchased heat

Vassil Vassilev

Manager

Termoservice

LEEDuser Basic Member

12 thumbs up

Project location :

May 28, 2017

Greetings, The project we are modeling follows LEDD v3 - 2007 (System 7) and the heating source is purchased heat. There are two question related to this issue. 1. Is there some interpretation or other amendments clearing how much will be the pump power, because it is written (G3.1.3.5) "….(except for purchased water or steam)…". 2. The allowed pump power in W/gpm is it per all heating water system or it could be split somehow (as per floor area) Your advice will be highly appreciated. Thanks.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 05/29/2017 - 20:26

You can model it identical to the proposed pumps, since 90.1-2007 does not say how to model them. You can also apply Addendum ai which would have you model them at 14 W/gpm. It is all primary pump and is not split.

Bob Crowell

Vice President / Principal

2rw Consultants, Inc.

LEEDuser Basic Member

1 thumbs up

Wed, 06/21/2017 - 18:57

Hey Marcus, Applying Addendum ai does not give me any direction on whether or not these pumps should be variable speed. Any ideas if whether or not it is based on square footage? Thanks

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 06/21/2017 - 19:54

If you go back to G3.1.3.5 I think it is variable over 120,000 sf and riding the curve if under.

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