کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4991422 | 1457113 | 2017 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental and analytical study of the overall heat transfer coefficient of water flowing through a single fracture in a granite core
ترجمه فارسی عنوان
بررسی تجربی و تحلیلی از ضریب انتقال حرارت کلی جریان آب از طریق یک شکستگی در یک هسته گرانیت
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
An experimental and analytical study was conducted to improve the understanding of the heat transfer characteristics between flowing water and granite fracture wall. A systematic experimental study of water flow and heat transfer through a single fracture in a well-characterized granite specimen was performed under confining pressures of 0, 3 and 6 MPa and confining temperatures of 70, 80, 90 and 100 °C. Based on the test data, four existing formulas of the overall heat transfer coefficient (OHTC) were evaluated. Compared to other formulas that may predict abnormal OHTC values (extremely large or negative values), Formula D and the newly proposed Formula E were suitable indicators of the OHTC under our experimental conditions. The proposed method is recommended because of its rigorous theoretical basis, concise form and effective prediction results. Based on the proposed formula E, we found that OHTCs were positively correlated with flow rates. However, wider fracture apertures resulted in smaller OHTCs, suggesting that wider apertures decrease the heat transfer efficiency. Additionally, most of the slopes of the OHTC-aperture curves were similar. Finally, we investigated the conditions for which OHTC formulas produced abnormal values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 116, April 2017, Pages 79-90
Journal: Applied Thermal Engineering - Volume 116, April 2017, Pages 79-90
نویسندگان
Bing Bai, Yuanyuan He, Xiaochun Li, Jun Li, Xiaoxue Huang, Jialing Zhu,