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RE: [EnergyPlus_Support] EvapCooler RDD Special Cooler

The RDDspecial model is fairly generic and can represent any type of
indirect cooler with a constant wetbulb effectiveness.  The terms
"effectiveness" and "efficiency" are somewhat interchangeable here.  The
value for "cooler maximum effectiveness" would be the same as what you
use for "coil maximum efficiency" in the input for
EvapCooler:InDirect:WetCoil.  The Dewpoint effectiveness factor can be
set to 1.0 - it only comes into play for wetbulb effectiveness values
well over 1.0 (as for M-cycle coolers).  

 

________________________________

From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of asheaffe
Sent: Thursday, May 10, 2007 3:50 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] EvapCooler RDD Special Cooler

 

To All,

I would like to simulate an indirect evaporative cooler where the 
secondary air is building exhaust air - so I am using the RDDSpecial 
object. I would like the object to behaive like a wet coil indirect 
evaporative cooler. The issue I am having is that I can't figure out 
what the inputs for the object should be to make it behaive like a wet 
coil as opposed to a regular indirect pad cooler. I know there is an 
example file, but I don't know what type of cooler is in the example 
file. What should I input for the "Cooler Maximum Effectiveness"? 
What about the "Dewpoint Effectiveness Factor"?

Thanks,

Andrew

 



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