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--></style></head><body lang=ZH-CN><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear experts,</span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I think there is a problem with the pipe (type31) algorithm.</span></p><p class=MsoNormal><span lang=EN-US>Due to the length of the pipe, changes in the input temperature do not immediately affect the outlet temperature. This phenomenon is very noticeable with long pipes. However, in trnsys, the outlet temperature of the pipe changes immediately regardless of the length of the pipe setting. As shown in the figure below, in a 1km pipe, when the input temperature changes by a step, the outlet temperature changes immediately. Is there a solution to this problem?</span></p><p class=MsoNormal><span lang=EN-US><img width=647 height=349 style='width:6.743in;height:3.6319in' id="图片_x0020_3" src="cid:image002.png@01D64E32.66302190"></span><span lang=EN-US style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks & Best Regards!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Pengfei Han Ph.D. Student<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>1-235, School of Electronic Information and Electrical Engineering,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Shanghai Jiao Tong University Minhang Campus<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>800 Dongchuan Road, Minhang District<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Shanghai, P.R.C.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Post Code: 200240<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Mail: han_pf@sjtu.edu.cn<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>