Wow. You stated these questions so well that I can only think that you did so already knowing the answeres.<br>1. You can't. You need a comprehensive data set from your chiller supplier, specifying a matrix of COPs at different water temperatures on supply and return side as well as condenser supply and return side.<br>
2. This will be clear in the data set. It is very possible.<br>3. There is no mathematical thermal corrolation. It is chiller dependant. It is a different data set.<br>4. Yes. You'll need data at all the points where your chiller may operate at. For example if you don't have data for the chiller performance at less than 20% of full rated capacity, then the simulation will issue a warning when your chiller model is required to output results at these conditions (most chillers will turn off below 20% demand).<br>
5. Correct.<br>I stand corrected on any points.<br><br><div class="gmail_quote">On 15 February 2013 10:36, #YEO KEAT KEE# <span dir="ltr"><<a href="mailto:YEOK0031@e.ntu.edu.sg" target="_blank">YEOK0031@e.ntu.edu.sg</a>></span> wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Dear Fellow Trnsys Users<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I am a new user to Trnsys and is modeling a water cooled chiller system using type 666 as the chiller. <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I understand that if I want to model a specific chiller model in the system, I will have to make changes to the chiller performance data file and the part load performance data file.
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">In the chiller performance data file, I see that there the capacity ratio and the COP ratio being defined as 1 at 7C Outlet CHWT 30C INLET CWT.
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p><u></u><span lang="EN-US"><span>1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-US">If I only have the performance data of the chiller at 6.7C Outlet CHWT 29.4C INLET CWT, how can I make use of this data to input it into the chiller performance data file?<u></u><u></u></span></p>
<p><span lang="EN-US"><u></u> <u></u></span></p>
<p><u></u><span lang="EN-US"><span>2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-US">Must the capacity ratio and the COP ratio being defined as 1 at 7C Outlet CHWT 30C INLET CWT, or can it be defined as 1 at other Outlet CHWT and Inlet CWT ?<u></u><u></u></span></p>
<p><span lang="EN-US"><u></u> <u></u></span></p>
<p><u></u><span lang="EN-US"><span>3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-US">How does the part load ratio data of the chiller relate to the different Capacity Ratio and COP ratio ?<u></u><u></u></span></p>
<p><span lang="EN-US"><u></u> <u></u></span></p>
<p><u></u><span lang="EN-US"><span>4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-US">In the parameter tab of the type 666 chiller, it is stated that “The capacity of the machine at its rated condition (typically 30 C (85 F) inlet cooling water temperature and 7 C (44 F) chilled water set point
temperature)The data file associated with this model should be consistent with this rating conditions.” . Does it mean that I have to include the chiller performance at 7C chilled water set point and 30C inlet cooling water temperature in the chiller performance
data file ?<u></u><u></u></span></p>
<p><span lang="EN-US"><u></u> <u></u></span></p>
<p><u></u><span lang="EN-US"><span>5.<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span lang="EN-US">In the chiller performance data file, it is observed that the chiller capacity ratio can be more than 1. Does this means that the chiller current capacity is higher than the rated capacity?
<u></u><u></u></span></p>
<p><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Can anyone kindly advice on the above mentioned queries ?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank You !<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Best Regards<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">KK Yeo<u></u><u></u></span></p>
<p><span lang="EN-US"><u></u> <u></u></span></p>
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