Re: [EnergyPlus_Support] Min and Max humidity control

[Don Shirey <shirey@xxxxxxxxxxxx>]

If you are talking about the object 
Coil:DX:CoolingBypassFactorEmpirical, there is no input for the air flow 
rate over the condenser coil unless you are modeling the evaporative 
condenser option. For the case of the evaporative condenser, the IO 
reference states that this value is only used to calculate the amount of 
water used to evaporatively cool the condenser inlet air.

The only other air flow input for this DX coil object is the rated air 
volume flow rate across the DX cooling coil, not the condenser coil.

I suggest that you refer to the EnergyPlus Engineering Reference for a 
better understanding of this model. Search for "DX Cooling Coil Model"


Emanuel Sá wrote:

> Thanks a lot for the tip! What if I try to control the zone for RH=50% 
> min
> and max, can (should) I use a hmidifier and a cooling coil with humidity
> control?
>
> One other question, I've simulated a DX cooling coil, and it says in the
> input/output reference that this kind of coil can also determine the
> electrical consumptiom of the exterior condenser unit fan etc... I have a
> air cooled exterior unit , the air flow is 2m^3/s, but when I change 
> the air
> flow to a big value to see the changes in the electrical consumption, it
> does not change! Is this output working properly or did I make anything
> wrong?
>
> Thanks once again, Emanuel
>
>
> ----- Original Message -----
> From: "Michael J. Witte" <mjwitte@xxxxxxxx>
> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
> Sent: Wednesday, November 09, 2005 1:53 AM
> Subject: Re: [EnergyPlus_Support] Min and Max humidity control
>
>
> > At the current time, the only way to do this is to have at least 2 
> zones
> > on the
> > system.  Use a humidistat in one zone to control max RH and put a
> > humidistat in
> > another zone to control min RH.
> >
> > Mike
> >
> > On 7 Nov 2005, at 20:36, dust_broom wrote:
> >
> >> Dear all:
> >>
> >> I would like to know if its possible to model a system with both min
> >> and max humidity control, using a steam humidifier and a
> >> DXcoil. For example, min RH= 45% and Max RH = 55%
> >>
> >> Thank you, Emanuel





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