[Equest-users] Multiple DOAS in Series

[Kathryn Kerns]

Has anyone ever tried to model 2 DOAS units in series? I have
successfully modeled a single DOAS/multiple fan coil system, but I have
never tried to string two DOAS units together by feeding the supply air
output of the first DOAS into the outside air input of the second DOAS.
The reason I ask is that I am looking for a way to model a DOAS that has
an ERV device located downstream after a heating and a cooling coil.
Does anyone know whether DOE-2 would treat the system exhaust air coming
back through the second DOAS ERV any differently than the exhaust air
going back through a single DOAS with an ERV unit? 

 

Assuming that this works, does anybody know how to add heat to, or
manually raise the temperature of, the ERV exhaust air? 

 

I am thinking if I can model a multiple DOAS with an elevated exhaust
temperature, I might be able to mimic a desiccant system. According to
James Hirsch in California, the energy balance used in the desiccant
tabs is not correct and should not be used, so I am out of luck there.

 

If anyone has another method for modeling a desiccant system, I would
love to hear from you.

 

Kathryn Kerns

Systems Specialist

BCE Engineers, Inc.

| Ph: 253.922.0446 | Fx: 253.922.0896 | 

 

 

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