[Equest-users] Modeling Zones with Unit heaters as per ASHRAE 90.1. Appendix G

[Hall, Brendan]

I know this has been addressed previously, but for heating only spaces you can treat them as heating only spaces as long as you cite addendum "DN" in your documentation. Check the ASHRAE website for specifics but in short this allows for heating only spaces that are served by unit heaters or unit ventilators (system 10 and 11). I think it makes more sense to treat the spaces in this manner than in adding cooling to both proposed and baseline where it does not exist otherwise.


Brendan Hall,  PE, LEED AP BD+C
Engineer, Mechanical
karpinski
ENGINEERING
3135 Euclid Avenue
Cleveland, OH  44115
P  216.391.3700<tel:216.391.3700> Ext 3111
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W www.karpinskieng.com<http://www.karpinskieng.com/>





From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of David Griffin
Sent: Monday, November 18, 2013 10:19 AM
To: 'Simge Andolsun'; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Modeling Zones with Unit heaters as per ASHRAE 90.1. Appendix G

Simge,

In  the past, I've just altered the cooling schedule for the space, so it never goes into cooling mode. Then I model the space per ASHRAE 90.1 Appendix G.

Thanks,

David W. Griffin II
Energy Analyst
ETC Group, LLC
801-278-1927 x 128
Cell 480-736-2945
dgriffin at etcgrp.com<mailto:dgriffin at etcgrp.com>
www.etcgrp.com<http://www.etcgrp.com>

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From: Simge Andolsun [mailto:simgeandolsun at gmail.com]
Sent: Friday, November 15, 2013 4:05 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Modeling Zones with Unit heaters as per ASHRAE 90.1. Appendix G

ASHRAE 90.1. Appendix G says that, even if a zone is heating only in the actual building, a cooling system identical to that in the baseline system should be modeled in the as-built model with intermittent fan operation to meet the loads. I have seen projects with zones that have only unit heaters with no cooling air supply. eQuest does not allow for modeling of any cooling system in a zone with a unit heater. What would be your approach to solving this problem?

I would appreciate it very much if you could help me with this question.

Thank you very much in advance for your suggestions,

Best Regards,
Simge Andolsun, PhD.
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