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<p><<span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;">I would need a component that can be used for diverting return flow rate from a cooling coil so that part of it goes back to the cooling source and part is mixed with the inlet flow rate. The idea is to keep the cooling fluid inlet temperature at its set point. </span></span><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"><strong>(Please see the attachment!).</strong></span></span><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> So in a way you could say that it’s a reverse application for a tempering valve.</span></span></span></span><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"></span></span></span></span><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> I have tried to implement this combining a flow diverter (Type 11f), a flow mixer (type 11h) and an iterative feedback controller (type 11h). However I it seems to be very difficult to get the controller to work properly and without convergence (Is it possible at all?). </span></span></span></span><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"></span></span></span></span><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> So my question is that what would you suggest to be the best way to do this? Can this be done with the basic TRNSYS components (e.g.type 11f), or is there a component in some TESS library that is designed for this kind of situation??></span></span></span></span></p>
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<p>Our tempering valve controller (Type 953 in TESS Controls Library) has modes for heating applications and cooling applications - so it should work well for your project.</p>
<p> </p>
<p>Jeff</p>
<p> </p>
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<pre>---
Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com</pre>
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<p>On 11/12/2013 12:06 pm, santeri siren wrote:</p>
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<div dir="ltr">Dear Trnsys users,<br /><br />
<div id="divBdy">
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<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"><br /></span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;">I would need a component that can be used for diverting return flow rate from a cooling coil so that part of it goes back to the cooling source and part is mixed with the inlet flow rate. The idea is to keep the cooling fluid inlet temperature at its set point. </span></span><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"><strong>(Please see the attachment!).</strong></span></span><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> So in a way you could say that it’s a reverse application for a tempering valve.</span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> </span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;">I have tried to implement this combining a flow diverter (Type 11f), a flow mixer (type 11h) and an iterative feedback controller (type 11h). However I it seems to be very difficult to get the controller to work properly and without convergence (Is it possible at all?).</span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> </span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;">So my question is that what would you suggest to be the best way to do this? Can this be done with the basic TRNSYS components (e.g.type 11f), or is there a component in some TESS library that is designed for this kind of situation?</span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> </span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;">Best regards,</span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"> </span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: black;"><span style="font-size: 10pt;"><strong>Santeri Siren </strong></span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: black;"><span style="font-size: 10pt;">Project engineer, M.Sc</span></span></span></span></div>
<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><span style="color: #1f497d; font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"><strong>Skanska Talonrakennus Oy</strong></span></span></span></span></div>
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<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><a href="https://access2.se.skanska.net/owa/redir.aspx?C=uixALwGYEkWkSY6HzfjC6S1PmdNos9AIbdqZljzqQTXRD_rU2nhQ7f7w3_ppsVH0NOhka5OdQDQ.&URL=http%3a%2f%2fwww.skanska.fi%2f"><span style="font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"><span style="color: #1f497d;">www.skanska.fi</span></span></span></a></span></span></div>
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<div style="margin: 0px;"><span style="font-family: Times New Roman,serif; font-size: small;"><span style="font-size: 12pt;"><a href="https://access2.se.skanska.net/owa/redir.aspx?C=uixALwGYEkWkSY6HzfjC6S1PmdNos9AIbdqZljzqQTXRD_rU2nhQ7f7w3_ppsVH0NOhka5OdQDQ.&URL=mailto%3asanteri.siren%40skanska.fi"><span style="font-family: Calibri,sans-serif;"><span style="font-size: 11pt;"><span style="color: #1f497d;">santeri.siren@skanska.fi</span></span></span></a></span></span></div>
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