[Equest-users] Thermostat setpoint quandry

[Sami, Vikram]

Thanks Erik.

Now what if it’s a scenario where the room has a minimum airflow requirement (like a lab or an operating room)? I would have thought resetting the supply air temp would settle the issue.

Also  - when I reduce the airflow rates, it still doesn’t behave well – I get cooling temperature setpoints in the winter.

Vikram Sami
AIA, BEMP, LEED BD+C
Associate Partner



ZGF ARCHITECTS LLP
T 206.521.3509 E vikram.sami at zgf.com<mailto:vikram.sami at zgf.com>
925 Fourth Avenue, Suite 2400
Seattle, WA 98104


From: erik.kolderup at gmail.com<mailto:erik.kolderup at gmail.com> [mailto:erik.kolderup at gmail.com] On Behalf Of Erik Kolderup
Sent: Monday, May 18, 2015 5:06 PM
To: Sami, Vikram
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Thermostat setpoint quandry

Vikram,

I suggest checking your minimum airflow schedule ("Annual Schedule Airflow"). Looks like the values are greater than one, resulting in a constant volume system that gets driven to the heating setpoint. If the airflow were allowed to drop then there would probably be hours at the cooling setpoint.

Regards,
Erik

Erik Kolderup, PE, LEED AP
erik at kolderupconsulting.com<mailto:erik at kolderupconsulting.com> | 415.531.5198 | www.kolderupconsulting.com<http://www.kolderupconsulting.com>

On Mon, May 18, 2015 at 3:51 PM, Sami, Vikram <vikram.sami at zgf.com<mailto:vikram.sami at zgf.com>> wrote:
I’m a little stumped here.

I’m running a simple single zone VAV simulation that has a setback temperature schedule for heating and cooling seasons. For some reason, if you examine the hourly report, it seems to use the heating schedule for the entire year (inp file attached).What am I missing?

Any insight would be much appreciated.


Vikram Sami
AIA, BEMP, LEED BD+C
Associate Partner



ZGF ARCHITECTS LLP
T 206.521.3509<tel:206.521.3509> E vikram.sami at zgf.com<mailto:vikram.sami at zgf.com>
925 Fourth Avenue, Suite 2400
Seattle, WA 98104


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