کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4926400 | 1431598 | 2017 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimizing discrete V obstacle parameters using a novel Entropy-VIKOR approach in a solar air flow channel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
In this paper the experimental investigation and optimization of the performance of discrete V obstacles in solar air channel is reported. The discrete V obstacles have desperate trend on thermal boundary layer formation on the downside of heat conveying surface. Besides this, increase in friction losses deteriorates the overall performance of the air flow solar channel. Therefore, it becomes essential to optimize the performance defining criteria with their simultaneous consideration and evaluate an optimal parameter set that delivers higher thermal as well as collector efficiency and lower hydraulic performance at the same time. Hybrid Entropy-VIKOR method, a multi criteria decision making approach is therefore applied to the experimental data obtained, which quantifies these criteria as a mutual agreement. Based upon the Entropy-VIKOR optimization methodology, it has been observed that the relative angle of attack, discrete distance ratio and the discrete width ratio of the inserted V obstacle with gaps having numerical value of 0.666, 0.67 and 1.0 presents an optimal parameter set. The enhancement in thermal, hydraulic and collector efficiency yielded at an optimal parameter set is 4.2-6.2, 5.9-8.4 and 1.23-1.47 times respectively with discrete V obstacles compared to air flow channel without obstacles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 106, June 2017, Pages 310-320
Journal: Renewable Energy - Volume 106, June 2017, Pages 310-320
نویسندگان
Ashutosh Sharma, Ranchan Chauhan, Tej Singh, Anil Kumar, Raj Kumar, Anil Kumar, Muneesh Sethi,