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Re: [EnergyPlus_Support] Desiccant dehumidifier:no fans
The flow rates in the Dehumidifier:Desiccant:NoFans object only specify
the nominal or rated flow rates (the size of the unit). The actual air
moving through the desiccant system is determined by other inputs. For
example, the amount of outdoor air specified in the outdoor air
controller. Change these other inputs and you should see a change in air
flow rate. Note that this example file uses the default performance
curves as specified in the Performance Model Type input at the end of
this object. See the input output and engineering reference for more
information.
Dehumidifier:Desiccant:NoFans,
Desiccant 1, !- Name
FanAndCoilAvailSched, !- Availability Schedule Name
Outside Air Inlet Node, !- Process Air Inlet Node Name
Desiccant Process Outlet Node, !- Process Air Outlet Node Name
Regen Coil Out Node, !- Regeneration Air Inlet Node Name
Outside Air Inlet Node 2,!- Regeneration Fan Inlet Node Name
SystemNodeMaximumHumidityRatioSetpoint, !- Control Type
0.007, !- Leaving Maximum Humidity Ratio Setpoint {kg-H2O/kg-air}
1, !- Nominal Process Air Flow Rate {m3/s}
2.5, !- Nominal Process Air Velocity {m/s}
10, !- Rotor Power {W}
Coil:Heating:Gas, !- Regeneration Coil Object Type
Desiccant Regen Coil, !- Regeneration Coil Name
Fan:VariableVolume, !- Regeneration Fan Object Type
Desiccant Regen Fan, !- Regeneration Fan Name
DEFAULT; !- Performance Model Type
sriraj_3d wrote:
>
> Hi, I have used example file -DesiccantCVRhZoneRHCtrl- and edited it a
> little. To be specific, weather file, schedule and sizing period to
> suit my case. But the problem is the output values associated with the
> Desiccant dehumidifier like Regen air mass flow rate, process air mass
> flow rate, supply and regen fan power remains constant in spite i
> change the input value of Process air velocity, process air mass flow
> rate for desiccant dehumidifier:no fans. Only values that change are
> the process air temperature and humidity ratio. Why is it so? And
> where can i get the details of the wheel like the wheel diameter,
> Rotations per hour, wheel thickness etc?
>
>
--
Richard A. Raustad
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