[TRNSYS-users] Air Cooled Chiller ( Type 655 ) - Major problem

[mahdi shahrestani]

Dear Mr.Jeff Thornton
 
Many Thanks for your reply. 
According to your advice, I double checked every thing but I could not find any reason for this problem.
Following I have mentioned the parameters and inputs and also the result by changing inputs:
 
Parameters:
Rated capacity:                                   1266000.0
Rated C.O.P.:                                      3.0
Logical unit for performance data:         30
Logical unit for PLR data file:                31
Fluid specific heat:                                4.190
Number of ambient temperatures:          5
Number of CHW set points:                 6
Number of part load ratios:                   5
 
Inputs:
Chilled water inlet temperature:             12.22
Chilled water flow rate:                        50000
Set point temperature:                           8
Ambient temperature:                            40
Chiller control signal:                             1.0
 
Outputs: 
Ambient temperature Chilled water setpoint Outpot COP 
20 4 2.5 
30 4 2.5 
40 4 2.5 
20 8 2.5 
30 8 2.5 
40 8 2.5 
 
There is no change by changing two inputs on COP. 
I have attached my .tpf file along with two data files of type 655.
 
Your reply and concern to this issue is highly appreciated.
 
Many thanks 
Mehdi Shahrestani
  



----- Original Message ----
From: Jeff Thornton <thornton at tess-inc.com>
To: mahdi shahrestani <mahdishahrestani at yahoo.com>; knut.erik.enerstvedt at niva.no
Cc: trnsys-users at cae.wisc.edu
Sent: Tue, June 1, 2010 7:24:14 PM
Subject: Re: [TRNSYS-users] Air Cooled Chiller ( Type 655 ) - Major problem

<As you see there is no any connection between chilled water set point and
ambient temperature with outputs. Changing those two input parameters have
not any effect on output COP?>

It's likely that you have something wrong in either your data file, your
inputs, or your parameters.  Double-check everything.  I just ran a simple
test that shows that the air cooled chiller behaves as expected with
changing ambient and chilled water set point temperatures - see attached. 
If I were to guess, I would say that you have one of your parameters
wrong....

Jeff


Jeff Thornton
President - TESS, LLC

22 North Carroll Street - Suite 370
Madison WI 53703 USA

Phone: 608-274-2577
Fax: 608-278-1475
E-mail: thornton at tess-inc.com
Web: www.tess-inc.com



      
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