کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
301832 512517 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heat transfer performance and exergetic optimization for solar receiver pipe
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Heat transfer performance and exergetic optimization for solar receiver pipe
چکیده انگلیسی

The basic physical model of solar receiver pipe with solar selective coating is established, and associated heat transfer and exergetic performances are analyzed and optimized. Because of the heat losses of natural convection and infrared radiation, the energy absorption efficiency has a maximum at optimal incident energy flux. As the pipe radius decreases or flow velocity rises, the wall temperature drops for higher heat transfer coefficient, while the heat absorption efficiency increases. Along the flow direction, the heat absorption efficiency almost linearly decreases, while the exergetic efficiency will first increase and then decrease. As the inlet temperature rises, the heat absorption efficiency of the solar receiver pipe decreases, while the exergetic efficiency of absorbed energy obviously increases, so the exergetic efficiency of incident energy will reach maximum at the optimal inlet temperature. Additionally, the maximum exergetic efficiency of incident energy and optimal inlet temperature both increase with flow velocity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 35, Issue 7, July 2010, Pages 1477–1483
نویسندگان
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