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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Mukhtar,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">It is not mandatory to use Type 670, however I need a component in which the air outlet temperature of HX can remain unchanged.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I just used another Type (Type 753), but it has the same problem. Would you be able to suggest a component that would be suitable in
this case?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thanks in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Ali<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Mukhtar Abeid via TRNSYS-users<br>
<b>Sent:</b> August 29, 2021 7:31 AM<br>
<b>To:</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Cc:</b> Mukhtar Abeid <mukhtarabeid@gmail.com><br>
<b>Subject:</b> Re: [TRNSYS-users] Type 10<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="line-height:11.0pt"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">[External Email]<o:p></o:p></span></p>
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<p class="MsoNormal">Ali <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Type 670 is a bit complex where a bypass fluid is modelled. <o:p>
</o:p></p>
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<p class="MsoNormal">Is it significant to model the bypass fluid? If not, try to use another component.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Mukhtar<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="AR-SA" dir="RTL">في السبت، ٢٨ أغسطس ٢٠٢١ ٢٣:٢٣</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span> Ali Shahrouzian via TRNSYS-users <<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>>
<span lang="AR-SA" dir="RTL">كتب</span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span><span dir="LTR"></span>:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dear TRNSYS users,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am modelling a closed loop containing of Type 670 (water to air HX), Type 10 (thermal storage) and Type 642 (Fan). In fact, I am going to charge the thermal storage by using hot
air exiting from Type 670. <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">You can imagine, cold air after passing through the Type 670 and exchanging heat with hot water (90 C) , becomes hot (75 C) and then enters the Type 10 (rock bed thermal storage).
In this stage, hot air transfers its energy to storage. Finally, cold air enters the type 670 fan and returns to it.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">By passing the time, the thermal storage becomes gradually charged, so the outlet and inlet temperatures are approximately equal. Therefore, the inlet and outlet temperatures of
the Type 670 (HX) must also be the same. However, after charging the thermal storage, the HX outlet temperature increases continuously (<span style="color:black;background:white">It reaches a temperature of 105 degrees Celsius, which is higher than the temperature
of water as its heat source</span>) until an error message is displayed. <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I would appreciate it if anyone could assist me in this case.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Best Regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Ali<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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