[Equest-users] Where to find summary of overridden defaults etc.

[Mark Darrall]

Thanks for the feedback, everyone.

Overridden defaults always appear as red inputs, so identifying them isn't the issue - it's the time involved in going through the entire set of input boxes to find them all!

What I did for App. G baseline sizing was left the heating and cooling capacities blank and ran the sim. I then viewed the calculated capacities in the system summaries, adjusted them per the App. G oversizing factors, and plugged those numbers back into the coil size input box. For some reason, the coil sizing factor input box wasn't available, or I would have just put the factors in there.

Thankfully I have no unmet hours, though I do have some hours out of throttling range. I may try to track that down, though there seems to be no LEED or App. G requirements for that.

What I'm trying to do here is get by the reviewers, so as much as I can, I'll give them what they've asked for. These models are already significantly different from what they originally reviewed (the originals did not include a very large hood and makeup air unit that alone uses more energy than the other 7 AHUs combined).

Thanks again,

MARK DARRALL, AIA, LEED AP BD+C, NCARB
Senior Project Manager

[cid:image001.jpg at 01CBFFF0.A27C9A60]

DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN

A2SO4 Architecture, LLC
Union Station
300 South Meridian Street / 250
Indianapolis, Indiana 46225
TEL  317 388 8850
FAX  317 280 0692
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From: Carol Gardner [mailto:cmg750 at gmail.com]
Sent: Wednesday, April 20, 2011 4:45 PM
To: Nick Caton
Cc: Mark Darrall; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Where to find summary of overridden defaults etc.

You're probably getting at the nature of the reviewer's comment better than I did, Nick. I read "over-sizing" rather that "auto-sizing" because I had just read that section in the User's Manual.

So basically we are doing auto-sizing but we call it "sizing runs" which we use to input the pertinent data into the baseline, e.g. kW/cfm, cooling coil size, heating coil size and/or cfm, or some combination of output from our sizing runs.
On Wed, Apr 20, 2011 at 1:32 PM, Nick Caton <ncaton at smithboucher.com<mailto:ncaton at smithboucher.com>> wrote:
In brief, I do what Carol's describing.  I haven't read up on what the user's manual might say about "manual oversizing," but all my baseline system capacities are auto-sized using the same heating/cooling capacity factors described... I've yet to encounter any opposition from my reviewers using this approach.

For clarification and in contrast: baseline system efficiencies and fan energies are not auto-sized, but rather separately calculated and entered by hand, working from the auto-sized heating/cooling/airflow capacities derived from a sizing run.

If after a sizing run, incrementally adjusting heating/cooling capacities were necessary to correct unmet hours (though I haven't run into that case for a long while - when it comes up it's usually resolved checking/fixing other items), I suppose I would intuitively adjust the 1.15/1.25 factors a bit at a time until the numbers worked out, then proceed with the efficiency & fan calcs.

As to a "manual" capacity oversizing approach:  It's news to me...

~Nick

[https://mail.google.com/mail/?ui=2&ik=367e06555b&view=att&th=12f749d00f898106&attid=0.1&disp=emb&zw]

NICK CATON, E.I.T.
PROJECT ENGINEER
Smith & Boucher Engineers
25501 west valley parkway
olathe ks 66061
direct 913 344.0036<tel:913%20344.0036>
fax 913 345.0617<tel:913%20345.0617>
www.smithboucher.com<http://www.smithboucher.com>

From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>] On Behalf Of Carol Gardner
Sent: Wednesday, April 20, 2011 3:00 PM
To: Mark Darrall
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>

Subject: Re: [Equest-users] Where to find summary of overridden defaults etc.

Just a couple of comments, Mark. If a default was overridden, it would be you who did it so you would know what you overrode it with. If I am misunderstanding and you just couldn't see what the default was you can view it, usually by right clicking on the input box.

I am curious why the reviewer asked that autosizing not be done for the baseline. I was reading my Std 90 2004 User's guide this morning and was kind of surprised that in it they more or less suggest you need to oversize by hand. I'm not sure why. I know that you need to be careful where you put the 15% and 25% sizing increases in eQUEST but it's relatively easy to get them in the right spot.

As a check let me know what you think of my methodology. I set the system sizing ratio on the first screen of the Air-Side HVAC System to 1.0, and then set the Cool Size Ratio to 1.15 on the first screen under the Cooling tab, and the Heat Size Ratio to 1.25 of the first screen under the Heating tab. Is this what others do?

Carol
On Wed, Apr 20, 2011 at 11:15 AM, Mark Darrall <MDarrall at a2so4.com<mailto:MDarrall at a2so4.com>> wrote:
Thanks, everyone!

Don't forget, too, that the Appendix G requirements don't always jive with default eQ values. Also, my reviewer has asked that autosizing not be done for baseline, which probably meant more overrides...

I appreciate the tip on searching the .inp file. Thanks!

MARK DARRALL, AIA, LEED AP BD+C, NCARB
Senior Project Manager

Error! Filename not specified.

DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN

A2SO4 Architecture, LLC
Union Station
300 South Meridian Street / 250
Indianapolis, Indiana 46225
TEL  317 388 8850<tel:317%20388%208850>
FAX  317 280 0692<tel:317%20280%200692>
MOB 765 749 0841<tel:765%20749%200841>
www.a2so4.com<http://www.a2so4.com>

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From: R B [mailto:slv3sat at gmail.com<mailto:slv3sat at gmail.com>]
Sent: Wednesday, April 20, 2011 1:12 PM
To: Nick Caton
Cc: Mark Darrall; equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Where to find summary of overridden defaults etc.

If in the baseline (and may be the proposed case), I have made changes from the auto-sizing (and from the proposed design) to reduce the unmet hours, I count that as default over-ridden. This is usually a small number (less than 5 if I remember correctly).
On Wed, Apr 20, 2011 at 11:36 AM, Nick Caton <ncaton at smithboucher.com<mailto:ncaton at smithboucher.com>> wrote:
Hi Mark,

For eQuest, I don't believe there is any reasonable way to tally "default overrides."   For LEED submittals, I typically enter zeroes at the corresponding template queries, and that's what I've suggested to others for initial submittals.  I've heard others enter "9999" in all fields without comment, but 0 seems less conspicuous to me =).

There's further discussion on this topic in the archives - bookmark/favorite these links if you haven't already:
http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/
http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/

If a reviewer were to push me to come up with a figure without any specific guidance after an initial submittal, I suppose I would paste the .inp file into a word document, ctrl+f for instances of the text ".." without quotes, and explain that number represents an estimate of the number of non-library entries in the project (screengrab):
Error! Filename not specified.
I would probably wonder about the reviewer somewhere along the way too...  Anyone familiar with eQuest and LEED knows there's no way to finish a 90.1-based model without a horde of non-default entries...  I'm having difficulty guessing at how this figure could help an eQuest model reviewer do their job properly.  Perhaps it's specific to other software packages... Thoughts anyone?

To be clear, I'd sooner advise just entering 0's in lieu of jumping through any unnecessary hoops.

~Nick

Error! Filename not specified.

NICK CATON, E.I.T.
PROJECT ENGINEER
Smith & Boucher Engineers
25501 west valley parkway
olathe ks 66061
direct 913 344.0036<tel:913%20344.0036>
fax 913 345.0617<tel:913%20345.0617>
www.smithboucher.com<http://www.smithboucher.com>

From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>] On Behalf Of Mark Darrall
Sent: Wednesday, April 20, 2011 10:11 AM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Where to find summary of overridden defaults etc.

Hi,

I know that when a run has issues, it creates an ATTN report with the warnings listed. But how can I find out how many default values have been overridden without going through every screen and counting them?

Thanks, all!

MARK DARRALL, AIA, LEED AP BD+C, NCARB
Senior Project Manager

Error! Filename not specified.

DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN

A2SO4 Architecture, LLC
Union Station
300 South Meridian Street / 250
Indianapolis, Indiana 46225
TEL  317 388 8850<tel:317%20388%208850>
FAX  317 280 0692<tel:317%20280%200692>
MOB 765 749 0841<tel:765%20749%200841>
www.a2so4.com<http://www.a2so4.com>

Please consider the environment before printing this e-mail.

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Carol Gardner PE



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Carol Gardner PE
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