I would like to have capabilities to model different options for
dehumidification, such as reheat with a crossflow heat exchanger, dessicant
wheel, energy recovery wheel (on supply side), hot gas reheat, etc. Most of
the systems we see in the southeast cool to nominally 55F for
dehumidification much of the year, then reheat to neutral (70F) air to the
space.

From: Equest-users on behalf
of "Bishop, Bill"
Date: Tuesday, September 1, 2015 at 11:52 AM
To: "equest-users at lists.onebuilding.org"

Subject: [Equest-users] eQUEST wish list - DOAS capabilities?

Hi All,

DOE-2.3 is coming along slowly and it?s anybody?s guess as to when it will
be ready. That said, Steve gates is asking for feedback regarding DOAS
(dedicated outdoor air system) capabilities, as he will be implementing that
next. The intent is to allow it to operate with any type of system.

Please share your ideas for desired DOAS capabilities in eQUEST, and
emphasize what is most important to you. Limit your suggestions to anything
related to ventilation. I will send a compiled list to Steve next week.

Thanks!
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers &
Architects LLP
Senior Energy Engineer

134 South Fitzhugh Street Rochester, NY 14608
T: (585) 698-1956 F: (585) 325-6005
bbishop at pathfinder-ea.com
www.pathfinder-ea.com
Carbon Fee and Dividend - simple, effective, and market-based.

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Great suggestions. Also it would be nice to have the ability to modify a heating device downstream of the DOA cooling coil to simulate hot gas bypass or a supply desiccant system. There are many white papers regarding the efficiency of an enthalpy heat wheel located in the DOA supply downstream of the DX coil. This heat wheel is half exposed to the supply air and the other half heated by a hot water coil, furnace, hot gas bypass, heat pipe, etc.

Kathryn Kerns
Systems Specialist
BCE Engineers, Inc.
| Ph: 253.922.0446 | Fx: 253.922.0896 |

Now that I have finally shifted to Energyplus, it is to be expected that
the new version of eQuest will be released with all problems fixed, many
new features added, and still easy to use:-))
1. I second the previous poster that the dummy zones should be removed and
the OA system should do mass/temp calculations of actual return conditions
for all the streams that it caters to.
2. In the process, can the mixed air (including preheat) calcs and/or the
various help texts be streamlined. It is was never clear to me if the
preheat setpoint was just for the OA air or mixed air. Most of the OA
control strategies that I came across were about having a mixed air
setpoint, which was not allowed by eQuest (or I was not aware).
3. Since most economizers don't work as intended (problems with sensors,
leakage, stuck, cannot close completely etc), is there a way some of these
issues can be modelled directly instead of using workarounds.
4. While we are on the OA topic - has the OA /person and OA/sqft fixed
according to what ASHRAE wants instead of just Title 24? If not, then it
would be useful to have that fix.
Thanks,
-Rohini