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RE: type7

The "constant approach" method is a very simple way to account for the
cooling tower in the cooling system model.
The return cooling water temperature (Tcw,r) is assumed to be at a constant
increment above the ambient wet bulb temperature (Twb). 
Tcw,r=Twb + Tapp
Tapp is the "cooling tower approach", PAR 7 in Type 7.
The order of magnitude of Tapp is 5.0°C. You could look for manufacturer
data and identify a more accurate value for the cooling tower you want to
model. However, you have to keep in mind that the modeling principle itself
is very simplified and that the results of the cooling tower modeling will
not be accurate.

I hope this helps,

Michaël Kummert

_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert@engr.wisc.edu (*****NEW*****)

SEL Web Site: http://sel.me.wisc.edu 
TRNSYS Web Site: http://sel.me.wisc.edu/trnsys



> -----Original Message-----
> From: owner-trnsys@relay.doit.wisc.edu 
> [mailto:owner-trnsys@relay.doit.wisc.edu] On Behalf Of fardin 
> assilzadeh
> Sent: Saturday, December 14, 2002 02:54
> To: trnsys@relay.doit.wisc.edu
> Subject: type7
> 
> 
> 
> 
> hi every body
> 
> What’s (cooling tower approach)in TYPE7 TRNSYS(Absorption 
> Chiller)? How much it’s amount could be please?
> 
> thanks for your attention
> 
> 
> 
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