Performance investigation of double pass solar air heater duct having zig-zag square shape protruded absorber plate (eBook, PDF) - Gill, Barjinder Singh; Bhushan, Brij; Mahajan, Tarun
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Research Paper (postgraduate) from the year 2016 in the subject Engineering - Mechanical Engineering, grade: A, Beant College of Engineering and Technology, course: M.tech, language: English, abstract: This paper presents the effect of artificial roughness on the absorber plate for the double pass solar air heater duct. The roughness used on the absorber plate is of zig-zag square shape protrusions. It is observed that the protrusions on the one side of the absorber plate will form dimples on its other side. So there will be combined effect of protrusions and dimples on the heat transfer…mehr

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Research Paper (postgraduate) from the year 2016 in the subject Engineering - Mechanical Engineering, grade: A, Beant College of Engineering and Technology, course: M.tech, language: English, abstract: This paper presents the effect of artificial roughness on the absorber plate for the double pass solar air heater duct. The roughness used on the absorber plate is of zig-zag square shape protrusions. It is observed that the protrusions on the one side of the absorber plate will form dimples on its other side. So there will be combined effect of protrusions and dimples on the heat transfer characteristics of the double pass solar heater. Thermal and thermo hydraulic performance of the double pass solar air heater have been investigated for Reynolds number ranges of 6000-18000, for fixed values of relative longway length (L/e), relative shortway length (S/e), relative roughness height (e/) and aspect ratio of 25, 21.875, 0.03 and 10 respectively. Overall heat transfer coefficient of the system has also been evaluated and compared with the smooth duct.