<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">Hi,<br>can you please send me your simulation to see what did you link to type 666<br><br>thanks<br>edy<br><div><span></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> #YEO KEAT KEE# <YEOK0031@e.ntu.edu.sg><br> <b><span style="font-weight: bold;">To:</span></b> "trnsys-users@cae.wisc.edu" <trnsys-users@cae.wisc.edu> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, March 27, 2013 5:44 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [TRNSYS-users] TYPE 666 Chiller Queries<br> </font> </div> <br>
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<div class="yiv358624317MsoNormal"><span lang="EN-US">Dear Fellow Trnsys Users, </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">I am running a parametric study using the TYPE 666 Chiller and I have some unexplainable observations with regards to the Chiller COP.
</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">It seems that the chiller COP has a lot of unexplainable spikes and fluctuations throughout the simulated year.
</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">This is observed despite </span></div>
<div class="yiv358624317MsoListParagraph" style=""><span lang="EN-US"><span style="">1.<span style="font:7.0pt;">
</span></span></span><span lang="EN-US"> An almost constant part load ratio (load) handled by the chiller.
</span></div>
<div class="yiv358624317MsoListParagraph" style=""><span lang="EN-US"><span style="">2.<span style="font:7.0pt;">
</span></span></span><span lang="EN-US">Entering Condenser Water Temperature to the chiller remains almost constant, with little fluctuations. </span></div>
<div class="yiv358624317MsoListParagraph" style=""><span lang="EN-US"><span style="">3.<span style="font:7.0pt;">
</span></span></span><span lang="EN-US">Power consumed by the chiller remaining almost constant.
</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">I understand that in TRNSYS, COP=Qmet/P, if both the Qmet and P are relatively constant, what could be causing the spike observed in the COP ?</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">I have attached some screen shots from the results of my simulation.
</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">Has anyone encountered the same situation before ? Or any advice on why this is happening ?</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US"> </span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">Best Regards,</span></div>
<div class="yiv358624317MsoNormal"><span lang="EN-US">Yeo </span></div>
</div>
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