[Equest-users] Ventilation air machine with FCU

[RobertWichert]

If this is actual equipment, not a theoretical study, it would be nice 
if the equipment manufacturers had some advice on modeling.  I know that 
Climate Master tried to do this for a while on their Ground Source Heat 
Pumps.  All gone now I think.

But if it's real equipment, calling the manufacturer and saying "I'm 
trying to model your equipment in EQuest" might at least give them the 
vague hint that EQuest exists and is used for things that might make 
their equipment more easily specified.

I mean, everybody gives AutoDesk details now, right?



OK, I'm dreaming, I know...



Robert Wichert P.Eng. LEED AP BD&C
+1 916 966 9060
FAX +1 916 966 9068







===============================================

On 3/27/2014 9:21 AM, Matt Hein wrote:
> In the grand scheme of things it's all the same (air movement, heat 
> source, heat rejection, pumping, and controls). The devil is in the 
> (eQuest configuration) details.
>
> I think I would use a packaged single-zone with reheat (SZRH) and 
> adjust the curves and other performance parameters to try and match 
> the actual FCU. Coil placement and other attributes are different but 
> your best efforts (and good documentation) are all you can give.
>
> Anyone else have suggestions?
>
> - Matt Hein
>
>
> On Thu, Mar 27, 2014 at 10:35 AM, Nick Patsos <nick.patsos at gmail.com 
> <mailto:nick.patsos at gmail.com>> wrote:
>
>     Hi Matt,
>
>     thanks for your answer. I have set an exhaust fan at zone level
>     but the problem is that still the Outdoor air heat recovery is not
>     enabled under the FCU system parameters.
>
>     Any further thoughts ?
>
>     Best regards
>     Nick Patsos
>     Mechanical Engineer
>
>
>     On 27 March 2014 15:50, Matt Hein <heinm04 at gmail.com
>     <mailto:heinm04 at gmail.com>> wrote:
>
>         Nick,
>
>         eQuest limits the HVAC systems for a thermal zone to (1)
>         air-side system that may have reheat and/or supplemental heat,
>         (1) baseboard heat source, (1) exhaust system. To model the
>         VAM system you need to create an equivalent system to the
>         overall systems operating in the thermal zone.
>
>         I think you can model your system by creating an exhaust fan
>         (and schedule) for the zone and incorporating the HEX into the
>         FCU using Outdoor Air Heat Recovery. You will need to make
>         some adjustments to system performance (e.g. kW/cfm) to make
>         sure overall performance of the simulated system and actual
>         system align.
>
>         - Matt Hein
>
>
>         On Wed, Mar 26, 2014 at 10:29 AM, Nick Patsos
>         <nick.patsos at gmail.com <mailto:nick.patsos at gmail.com>> wrote:
>
>             Hello everyone,
>
>             I'm trying to model in eQuest a ventilation air machine
>             (VAM), which is a simple plate heat exchanger with an OA
>             fan and an exhaust fan.
>
>             How can it be modelled to operate with an FCU type of
>             system? (VAM for fresh air heat recovery and FCU for
>             cooling/heating).
>
>             Best regards
>
>             Nick Patsos
>             Mechanical Engineer
>
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>
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