[Equest-users] Ventilation air machine with FCU

Nick Patsos nick.patsos at gmail.com
Thu Mar 27 08:35:32 PDT 2014


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> 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>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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