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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi Hassan, <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Usually, type 340 is used as a water storage tank, so whenever the storage temperature goes below 0 °C, it's Ice, and you get a warning from type 340. You can also read the type source code; I am attaching the screenshot showing the error. This is also correct when we have only water in the tank. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>However, in your simulations, you use this tank with antifreeze on the heat pump source side. Therefore it's expected that temperatures are going below 0 °C.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>To solve this problem, you have two solutions: <o:p></o:p></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Changing the source code of Type 340 (removing this warning message below 0 °C) and recompiling the type with a different name (maybe Type 339), only use this new complied type 339 as a source side tank. <o:p></o:p></li></ol><p class=MsoNormal><o:p> </o:p></p><ol style='margin-top:0cm' start=2 type=1><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Or you can increase the limit of the before error value in the Control card (Before ERROR value: "This value is used in the LIMITS statement to set a limit on the number of warnings before the simulation is terminated and an ERROR message is printed"), with this change, your simulations will not stop. However, I don't recommend this because if you have a warning message from any other types, the simulation will still run, and you might generate unrealistic results. But you can check in the lst file after simulations, if any other type is not giving you warnings, then this is a straightforward solution. <o:p></o:p></li></ol><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img width=439 height=278 style='width:4.5739in;height:2.8956in' id="Picture_x0020_1" src="cid:image001.png@01D88C9E.FB3F4A20"> <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best regards <o:p></o:p></p><p class=MsoNormal>Bharat<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='mso-fareast-language:EN-GB'>From:</span></b><span lang=EN-US style='mso-fareast-language:EN-GB'> TRNSYS-users <> <b>On Behalf Of </b>Mahach, Hassan via TRNSYS-users<br><b>Sent:</b> Dienstag, 28. Juni 2022 16:31<br><b>To:</b> trnsys-users@lists.onebuilding.org<br><b>Cc:</b> Mahach, Hassan <mahach@izes.de>; Rauber, Karsten <Rauber@izes.de><br><b>Subject:</b> [TRNSYS-users] Heat Storage: Type 340<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=DE style='font-family:"Arial",sans-serif'>Hi everyone,<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>I’m Simulating a Heat pump (TYPE 401) connected to a heat exchanger which is immersed in a heat storage (please see picture enclosed). After some time, the simulation stop because of the following error :<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><i><span lang=EN-US style='font-family:"Arial",sans-serif'>“water in the store is ice at I: 56 J:2 T:-0.2…”<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></i></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>And this could be because of the outlet temperature of the evaporator (the input to the HX immersed in the Heat storage) which may be lower than 0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>I’m simulation the heat storage with Type 340, and I change the thermal properties of the fluid in the storage so I can assume that I have water mixed with antifreeze but also the same error.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>My question is : is Type 340 just for water or we can we use any kind of fluid?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>Have anyone an answer for this question or an idea to solve this problem?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>Thank for your cooperation<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'>Hassan<o:p></o:p></span></p><p class=MsoNormal><i><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></i></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=DE style='color:black;mso-fareast-language:DE'>Dr. Hassan Mahach</span></b><span lang=DE style='color:black;mso-fareast-language:DE'><o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'>wissenschaftlicher Mitarbeiter<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'>Arbeitsfeld Technische Innovationen<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'>+49 681 844 972 23<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'><a href="mailto:mahach@izes.de">mahach@izes.de</a><o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'><a href="http://www.izes.de">www.izes.de</a><o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:black;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>IZES gGmbH | Altenkesseler Straße 17, Geb. A1 | 66115 Saarbrücken<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>Büro Berlin | Albrechtstraße 22 | 10117 Berlin<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>Telefon: +49 681 844 972 0 | Fax: +49 681 761 799 9<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>Rechtsform: gGmbH | Registergericht Saarbrücken HRB 8499<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>Steuernummer: 040 140 241 53 | USt.-IdNr.: DE 138 113 796<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>Aufsichtsratsvorsitz: Ministerpräsidentin Anke Rehlinger<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'>Geschäftsführung: Prof. Frank Baur | Dr. Lesya Matiyuk<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:9.0pt;color:black;mso-fareast-language:DE'><img border=0 width=394 height=74 style='width:4.1043in;height:.7739in' id="Grafik_x0020_1" src="cid:image004.jpg@01D88C9C.9E908D90"><o:p></o:p></span></p><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p></div></body></html><br><small>¥2022 ISFH [1641222005]</small>