[TRNSYS-users] Likely bugs in Type655 and Type666

[knut.erik.enerstvedt at niva.no]

Hello again,

I have compared a datafile I have set up myself based on a particular air 
cooled chiller model with the sample data file for Type 655, and it seems 
like the sample data file is appropriate, but of course in reversed order. 
So I think you can safely just swith the two columns in the sample file so 
that COP comes first and capacity second. I think this is also the case 
for Type 666.

Best regards,
Knut Erik 



From:
a8304506 at graduate.hku.hk
To:
knut.erik.enerstvedt at niva.no
Cc:
trnsys-users at engr.wisc.edu
Date:
04/30/2010 03:15 PM
Subject:
Re: [TRNSYS-users] Likely bugs in Type655 and Type666



Hello, Knut.

Thank you for your reply, but do you know if the information indicated in 
the
sample data file is appropriate, i.e. the first column is really the 
capacity
ratio while the second column is the COP ratio.  Your reply is 
appreciated.

Best Regards
LEE, Chun Kwong
Division of Building Science and Technology
City University of Hong Kong

Quoting knut.erik.enerstvedt at niva.no:

> Hello,
> 
> You are absolutely right about this. There is a mismatch between 
> documentation and example datafile on one side and source code on the 
> other. The first column in the datafile should consist of COP ratios, 
> while the second column should consist of capacity ratios. There have 
been 
> some postings about this on the list in the past.
> 
> Best regards,
> Knut Erik Enerstvedt
> 
> 
> 
> >Hello, all.
> 
> >I previously developed a parametric model for a water-cooled chiller. I 

> used it
> >to compare the results with those based on Type666.  I then found that
> >calculated COP seemed to increase only mildly during the low-load 
period 
> when
> >using Type666.  I went through the source code and the related data 
> files.  I
> >found that the following statements appeared to be wrong:
> 
> >COP_RATIO=Y(1)
> >CAP_RATIO=Y(2)
> 
> >According to the data file, the first output should be the capacity 
ratio 
> while
> >the second output is the COP ratio.  The same case happened for 
Type655. 
> Am I
> >wrong?
> 
> >Best Regards
> >LEE, Chun Kwong
> >Division of Building Science and Technology
> >City University of Hong Kong
>
------------------------------------------------------------------------------------------------------------
> Meld deg p?v緳t nyhetsbrev p?www.niva.no







------------------------------------------------------------------------------------------------------------
Meld deg pa vart nyhetsbrev pa www.niva.no
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20100430/6ad5fbdc/attachment-0001.htm>