کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
645299 | 1457140 | 2015 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigation on the efficiency of flat-plate solar collectors with nanofluids
ترجمه فارسی عنوان
تحقیقات تجربی در مورد کارایی تابلوهای خورشیدی تخت با نانوفیلد
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کلمات کلیدی
نانوفیلد ها، گردآورنده خورشیدی تابلو، انرژی خورشیدی، کارآیی جمع آوری، افزایش گرما،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this study, Cu-H2O nanofluids with different mass fraction and size were prepared through two-step method. Its thermal conductivities and the effect of Cu-H2O nanofluids on the efficiency of a flat-plate solar collector was investigated experimentally. Meanwhile, the water temperature, heat gain of the flat-plate solar water heater and the frictional resistance coefficient of working fluid were also investigated. The mass flow rate of medium was 140Â L/h. The experimental results show that the thermal conductivities can be enhanced observably. The efficiency of solar collector was enhanced by 23.83% with using Cu-H2O nanofluids (25Â nm, 0.1Â wt%) as the absorbing medium. The efficiency of Cu-H2O nanofluids (25Â nm, 0.2Â wt%) is lower than that of Cu-H2O nanofluids (25Â nm, 0.1Â wt%). With the nanoparticle size increasing, the efficiency of solar collector decreased. The highest temperature and highest heat gain of water in the nanofluid (25Â nm, 0.1Â wt%) tank can be increased up to 12.24% and 24.52% compared with water tank, respectively. The increment rate of the frictional resistance coefficient is less than 1% in the whole working temperature area. From the results, it can be indicated that the Cu-H2O nanofluids is suitable for enhancing the efficiency of flat-plate solar collector.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 88, 5 September 2015, Pages 165-171
Journal: Applied Thermal Engineering - Volume 88, 5 September 2015, Pages 165-171
نویسندگان
Qinbo He, Shequan Zeng, Shuangfeng Wang,