Matthew W. Higgins
MWHiggins at bpce.com
Mon Jun 14 12:08:24 PDT 2010
Just speaking from one of my previous projects with a large warehouse component:
- The warehouse was required by the LEED reviewers to be heated and cooled
- I could not just simulate ventilation energy in the proposed case
- I tried presenting my case and showing the effects of conditioning/not conditioning a few variations of proposed and baseline, but had to go to an appeal to finish EA c1 because the review team appeared to change their request during the re-submittal
- It may have been mentioned before, but if I would have known about it from the beginning I would have saved a lot of time/frustration: CIR!
Don’t shoot me for not remembering where it is, but basically it allowed me (and the previous CIR recipient) to move the TSTAT set-points in the warehouse so far out that both heating and cooling would never come on, thus simulating ventilation-only energy. Seems like a sneaky work-around, but by doing this in both models it’s treated as an allowable measure.
Not sure if this helps out in terms of trying to prove the minimum required energy cost savings in any other facility though.
Matthew Higgins, ASHRAE-HBDP, LEED-AP
Bridgers & Paxton Consulting Engineers, Inc.
4600-C Montgomery Blvd. NE
Albuquerque, NM 87109
mwhiggins at bpce.com
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Varkie C Thomas
Sent: Friday, June 11, 2010 9:53 AM
To: James Hansen
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Warehouse
The warehouse I am looking at is a rectangular building, just under 1.5 million sf and with a ceiling height of 41 ft. Maximum occupancy is 50 people mostly in 12,000 sf of administrative offices with 10 ft ceiling. Why maintain the entire mass of air occupying the space volume in the warehouse at 75 deg F in summer and 70 deg F in winter? Can the proposed warehouse model use just ventilation and save energy. The percent energy savings for LEED certification is enormous. Mechanical floors are heated (to prevent pipe freezing) and ventilated. Underground parking is ventilated. Does ASHRAE Std90 for commercial buildings include industrial buildings (steel plants)? The definition only mentions area and number floors. I might have got it wrong. I have only worked on commercial that house people.
----- Original Message -----
From: James Hansen <JHANSEN at ghtltd.com>
Date: Thursday, June 10, 2010 7:02 pm
Subject: RE: [Bldg-sim] Warehouse
> I�ve modeled a few self storage facilities before, and also had
> this question. As far as I could tell, System 7 really was the
> right system for my baseline building, and my condensing furnaces
> with split system AC units actually had less energy consumption
> than the chilled water / boiler system. Go figure�
> From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-
> bounces at lists.onebuilding.org] On Behalf Of Varkie C Thomas
> Sent: Thursday, June 10, 2010 6:41 PM
> To: Varkie C Thomas
> Cc: 'bldg-sim at lists.onebuilding.org'
> Subject: Re: [Bldg-sim] Warehouse
> Since I got no replies, it was must have been a dumb question. I
> assume Std90 systems and plant are for the baseline only and for
> the proposed you can use something else. A proposed packaged VAVS
> with furnace heating and DX cooling produced nearly the same
> kbtu/sqft/yr (0.1 difference) as the baseline of chilled water and
> hot water.
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