کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7160577 | 1462844 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Convective heat transfer performance of CuO-water nanofluids in U-shaped minitube: Potential for improved energy recovery
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Convective heat transfer performance of CuO-water nanofluids in U-shaped minitube: Potential for improved energy recovery Convective heat transfer performance of CuO-water nanofluids in U-shaped minitube: Potential for improved energy recovery](/preview/png/7160577.png)
چکیده انگلیسی
Heat removal from a constant temperature heat source is relevant in energy recovery from thermal energy storage systems and catalytic reactors. Experiments were carried out to assess the heat transfer performance of CuO-water nanofluid flowing through a U-shaped minitube (0.9Â mm inner diameter) for heat removal from a constant temperature source, with nanoparticle concentration (0.025-0.1Â wt%) and volumetric flow rate (0.18-1.25Â mL/s) as the independent variables. The thermal conductivity and viscosity of CuO-water nanofluids increased linearly with nanoparticle concentration, with thermal conductivity enhancement higher than that of viscosity increase. The heat transfer rate, heat transfer coefficient and Nusselt number of CuO-water nanofluids were higher than that of water. The improved heat transfer performance of CuO-water nanofluids may be attributed to their improved thermal conductivity and particle migration effects. Our experiments reveal that the heat transfer performance of CuO-water nanofluids in U-shaped minitube is enhanced to a larger extent at the lower flow rates and at an optimum nanoparticle concentration of 0.05Â wt%. We believe that the existence of an optimum nanoparticle concentration may be attributed to the enhanced synergistic effect of higher thermal conductivity and particle migration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 118, 15 June 2016, Pages 415-425
Journal: Energy Conversion and Management - Volume 118, 15 June 2016, Pages 415-425
نویسندگان
V. Leela Vinodhan, K.S. Suganthi, K.S. Rajan,