کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10127330 | 1645050 | 2018 | 50 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of fin types and Prandtl number on performance of plate-fin heat exchanger: Experimental and numerical assessment
ترجمه فارسی عنوان
اثر نوع پنجه و تعداد پراندل بر عملکرد مبدل حرارتی پانل برش: ارزیابی تجربی و عددی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
An experimental investigation is performed using liquid R113 to study the thermohydraulic characteristics of plate-fin heat exchanger with plain, serrated and perforated fins. Meanwhile, three performance evaluation criteria j/f, j/f1/2 and j/f1/3 are used to qualitative compare their comprehensive performance. Further, to study the effects of heating condition and Prandtl number on heat transfer, a numerical model of serrated fins is carried out. The fin channels with a uniform heat flux at bottom end or at both bottom and upper ends are studied as two types of heating conditions, namely, single-fold and two-fold modes. Besides, using air (Prâ¯=â¯0.744), R113 (Prâ¯=â¯9.02) and ethylene glycol (Prâ¯=â¯51.65) aqueous solution as working media, the Prandtl number effect is discussed. The results reveal that the comprehensive performance of serrated fins is the best. Colburn factor j of single-fold mode is lower than that of two-fold mode. The Colburn factor j decreases as the Prandtl number increases in laminar flow and it is independent of Prandtl number in turbulent flow. A modified Colburn factor j based on the Manglik & Bergles correlation is proposed as functions of (Pr/Prair)â0.04827 in laminar flow. The conclusions provide the guidance on the design of plate fin heat exchanger.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 144, 5 November 2018, Pages 726-735
Journal: Applied Thermal Engineering - Volume 144, 5 November 2018, Pages 726-735
نویسندگان
Huizhu Yang, Jian Wen, Simin Wang, Yanzhong Li,