[Equest-users] Air side economizer for DOAS system in eQuest 2.3

[pramod naik]

Thank you everyone for your valuable inputs.

Best,
Pramod

On Thu, 30 May 2024 at 23:22, Bill Bishop <William.J.Bishop at imegcorp.com>
wrote:

> Hi Pramod,
>
>
>
> The DOAS system type in eQUEST always runs with 100% OA, which is why
> economizer is not a useful input. The outside air inputs for the system and
> zones supplied by the DOAS dictate the hourly volume of OA supplied by the
> DOAS. (You can determine the hourly OA cfm in the simulation by creating a
> custom hourly report for the DOAS with the variables “Total system supply
> air flow rate (cfm)” and “Ratio of outside air to total supply air”. )
> Assuming your DOAS has heat recovery, you can set your ERV-TEMP-CTRL to
> Mixed Air Reset which gives you efficient ERV control for providing the SAT
> specified by the DOAS cooling and heating control inputs.
>
>
>
> Regards,
>
> ~Bill
>
>
>
> *William Bishop*, PE, BEMP, BEAP, CEM, LEED AP
> Sustainability & Energy Engineer of Distinction
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> *From:* Equest-users <equest-users-bounces at lists.onebuilding.org> *On
> Behalf Of *pramod naik via Equest-users
> *Sent:* Thursday, May 30, 2024 12:56 PM
> *To:* Seaman, Ethan <eseaman at smma.com>
> *Cc:* Seaman, Ethan via Equest-users <equest-users at lists.onebuilding.org>
> *Subject:* Re: [Equest-users] Air side economizer for DOAS system in
> eQuest 2.3
>
>
>
> *External Email: *Treat links and attachments with caution.
>
> That would be great if the DOAS system allows us to enter the deadband in
> the OA control tab.
>
>
>
> Thanks,
>
> Pramod
>
>
>
> On Thu, 30 May 2024 at 21:43, Seaman, Ethan via Equest-users <
> equest-users at lists.onebuilding.org> wrote:
>
> I haven’t had to set up a system like this, but I would think if the
> outdoor air conditions are in the deadband your fans would still blow but
> the coils would not turn on.
>
>
>
> *_______________________________________________*
> * Ethan Seaman*
> Sustainable Design Analyst
>
> *SMMA*
> t: 617.520.9288
>
> www.smma.com
>
>
>
> *From:* Equest-users <equest-users-bounces at lists.onebuilding.org> *On
> Behalf Of *Pramod .D via Equest-users
> *Sent:* Thursday, May 30, 2024 10:06 AM
> *To:* Seaman, Ethan via Equest-users <equest-users at lists.onebuilding.org>
> *Subject:* Re: [Equest-users] Air side economizer for DOAS system in
> eQuest 2.3
>
>
>
> Ethan,
>
>
>
> Thank you for your reply. How can I take the credit for using economiser
> for DOAS? Please suggest if you have done anything like this before..
>
>
>
> Thanks,
>
> Pramod
>
>
>
> On 30-May-2024, at 6:56 PM, Seaman, Ethan via Equest-users <
> equest-users at lists.onebuilding.org> wrote:
>
> 
>
> Hi Pramod,
>
> eQuest doesn’t allow you to use an economizer when a DOAS is selected.
>
> <image001.png>
>
>
>
>
>
>
>
> <image002.png>
>
>
>
> *_______________________________________________*
> * Ethan Seaman*
> Sustainable Design Analyst
>
> *SMMA*
> t: 617.520.9288
>
> www.smma.com
> <https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fwww.smma.com&c=E,1,2T_1gRVuX-PvmQbJZG34RZprZLD4QWLlTYPtOmuMvpE9H15wrclBTiJDsaIvafBSGTO-lO5uf-75OmQEYqJYx6j4PqFF7i-J_KHz5VS5loS80B5-cJbV5NQ,&typo=1&ancr_add=1>
>
>
>
> *From:* Equest-users <equest-users-bounces at lists.onebuilding.org> *On
> Behalf Of *pramod naik via Equest-users
> *Sent:* Thursday, May 30, 2024 12:55 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Air side economizer for DOAS system in eQuest
> 2.3
>
>
>
> Hi,
>
>
>
> I am modeling a Community center with VRF system and DOAS for outside air.
> I am using eQuest DOE 2.3. My DOAS unit has economizer in design but all
> the inputs on the "Outside Air and Economizer" tab are greyed out. Any help
> or suggestion on how to get this working is greatly appreciated.
>
>
>
> Thanks,
>
> Pramod
>
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