[Equest-users] Ventilation air machine with FCU

[Matt Hein]

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> 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> 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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>
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