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@tess-inc.com>
To: mahdi shahrestani <mahdishahrestani@yahoo.com>; knut.erik.enerstvedt@niva.no
Cc: trnsys-users@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@tess-inc.com
Web: www.tess-inc.com
Attachment:
Samp_C.Dat
Description: Binary data
Attachment:
Samp_PLR.Dat
Description: Binary data
Attachment:
air cooled chiller.tpf
Description: Binary data