[Equest-users] G3.1.3.12 Supply Air Temperature Reset

[Jenny Zhang]

Yes Omar,
the reset control method is crucial to total energy comsuption. it delays reheat start time and can be combined wth chiller water reset control.
I think you should get to know detail control logic of proposed VAV system from control schmetic drawings of AHU.Maybe you can ask the designer of HVAC system or related control system. Not every VAV system with supply temperature reset.

Regards
Jenny
________________________________________
From: Omar Katanani [omar at ecoconsulting.net]
Sent: 24 January 2011 20:31
To: Jenny Zhang; Ömer Moltay; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] G3.1.3.12 Supply Air Temperature Reset

Dear Jenny,

Do you have an idea of what shall we put for the Proposed Case?

I have a regular VAV system serving multiple zones. I tried 2 simulations: 1 with the Cool Control being "Constant" and 1 with the Cool Control being "Warmest" (similar to the baseline). I got an improvement of 17.5% in the first case, and 20.2% in the second case. I thought this parameter was not that significant, but it turned out to be so!

Which option do you suggest to adopt for the Proposed Scenario?

Many thanks!
Omar
___________________________
Omar Katanani
Sustainable Design Engineer
Email: omar at ecoconsulting.net

EcoConsulting (Lebanon)
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-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Jenny Zhang
Sent: 21 January 2011 04:35
To: 'Ömer Moltay'; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] G3.1.3.12 Supply Air Temperature Reset

Hi Omer,
you can find reset option in the airside system screen(COOLING).
my approach is to choose reset>warmest>airflow first.(For VAV system I think the airflow will reduce first to satisfy load then the supply air temperature could rise at the minimum air flow rate.)
the dealt t for reset is according to ASHRAE 90.1.

Regards
Jenny Z



-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of ?mer Moltay
Sent: 2011年1月20日 23:54
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] G3.1.3.12 Supply Air Temperature Reset

Dear All,

In eQuest, how can the air temperature for cooling in a VAV system be
reset as required by G3.1.3.12?

Thank you,

Omer Moltay, LEED AP
Mimta Ltd.


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