[Equest-users] FC+DOAS

[tiejun hu]

At 2011-04-14 21:03:47，"Joe Fleming" <joe at thespinnakergroupinc.com> wrote:


Search DOAS in the user archives and you will find abunch of discussions on this topic.

 

First you need to be in detailed mode, for some reason the DOE engine (maybe just eQuest), doesn’t have the skills to make a dedicated outdoor air system as a drop down selection. 

 

Next, what is the supply air temperature entering the zones from the DOAS?  Cold?  Room temperature? Hot?

What is the process that the DOAS goes through to get the leaving air temperature at set-point?

 

Typically, you need to create a “dummy space” and assign it to a “dummy zone” then assign your first system to this zone.  If you already created systems you can always open your .inp file and cut and paste the DOAS to the top of the systems list so that it will become your first system.  Go ahead and assign all of the outside air to your DOAS “dummy zone” and then choose outside air from system for all of the systems that this DOAS serves.   It will only be able to find OA from systems above it on the component tree, so make sure your DOAS is at the top.

 

 

Joe Fleming, E.I., LEED AP BD+C, BEMP

 

From:equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org]On Behalf Oftiejun hu
Sent: Thursday, April 14, 2011 1:11 AM
To: equest-users
Subject: [Equest-users] FC+DOAS

 

hi equesters

            Dose anybody have experiences for FC+DOAS, in my modle, outdoor air processed by independent air-condition unit, then supplied to room directly, do not go through FC inlet. as far as i kown, outdoor air and return air combined process in FC in some countries,like below picturebut On the upper right corner,i see an outdoor air fan, is it an DOAS? if so ,how to realize it in equest? and how to set in the tab "OA FROM SYSTEM"?

 any words will be appreciated!

                                                                                                                                                yours sincere

 hi joe

       thanks for your reply,this is my Processing,, independent outdoor air from DOAS are processed to S( isenthalpic with room N，H:90%), then mixed with supply air from FC outnet(L), outdoor air doesn't undertake indoor load.  Note that: my outdoor air do not get through FC, delivered to room derectly.

    i doubt that , as your method, Whether outdoor air from DOAS will be delivered to FC, flow through the fan in FC, then increase fan energy?

 thanks again!
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