کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
662086 | 1458175 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study on the thermal contact conductance in fin-tube heat exchangers with 7Â mm tube
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermal contact resistance has been frequently neglected in the process of design of heat exchangers because of the difficulty of measurement and the lack of accurate data. However, the thermal contact resistance is one of principal parameters in heat transfer mechanism of fin-tube heat exchangers. The objective of the present study is to investigate new factors such as fin types and manufacturing types of the tube affecting the thermal contact conductance and to find a correlation between the thermal contact conductance and the effective factors in fin-tube heat exchangers with 7Â mm tube. The thermal contact conductances in the 22 heat exchangers with 7Â mm tube have been investigated through the experimental-numerical method. A numerical scheme has been employed to calculate the thermal contact conductance and the portion of thermal resistances using the experimental data. As a result, the thermal contact conductance has been evaluated quantitatively, and a new correlation including the influence of new factors such as fin types and manufacturing types of the tube has been developed in the fin-tube heat exchanger with 7Â mm tube. Also, the portion of each thermal resistance has been evaluated in each case.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 7â8, April 2006, Pages 1547-1555
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 7â8, April 2006, Pages 1547-1555
نویسندگان
Jin Jeong, Chang Nyung Kim, Baek Youn,