An investigation of passive performance enhancement of parabolic trough solar concentrators using internal radiation heat shields /
Mahmoud Medhat Ibrahim Elbakry
An investigation of passive performance enhancement of parabolic trough solar concentrators using internal radiation heat shields / دراسة التحسن فى أداء المركزات الشمسية ذات القطع المكافئ المستخدمه للدروع الحرارية الانعكاسية الداخلية Mahmoud Medhat Ibrahim Elbakry ; Supervised Mahmoud A.Kassem , Muhammed A. Hassan - Cairo : Mahmoud Medhat Ibrahim Elbakry , 2021 - 69 P. : charts , facsimiles ; 30cm
Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering
This study investigates the performance enhancement of parabolic trough concentrators (PTCs) Using internal radiation heat shields in the annular space of the heat collection element. A 3D model based on Monte-Carlo ray tracing and computational uid dynamics is developed, validated, and used to examine 420 combinations of design and operating parameters.The proposed design outperformed the conventional one in the whole spectrum of operating conditions, except for a narrow range of low operating temperatures and high ow rates. Floating radiation heat shields with small diameters and large shading angles enhanced the temperature uniformity of heat collection element and showed the highest enhancement ratios of both energy and exergy efciencies, which were up to 15.4 and 14.4%, respectively. A radiation heat shield with a diameter of 75 mm and a shading angle of 150 was found the best performing conguration for most operating conditions
Parabolic trough concentrator Radiation heat shield Ray tracing
An investigation of passive performance enhancement of parabolic trough solar concentrators using internal radiation heat shields / دراسة التحسن فى أداء المركزات الشمسية ذات القطع المكافئ المستخدمه للدروع الحرارية الانعكاسية الداخلية Mahmoud Medhat Ibrahim Elbakry ; Supervised Mahmoud A.Kassem , Muhammed A. Hassan - Cairo : Mahmoud Medhat Ibrahim Elbakry , 2021 - 69 P. : charts , facsimiles ; 30cm
Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering
This study investigates the performance enhancement of parabolic trough concentrators (PTCs) Using internal radiation heat shields in the annular space of the heat collection element. A 3D model based on Monte-Carlo ray tracing and computational uid dynamics is developed, validated, and used to examine 420 combinations of design and operating parameters.The proposed design outperformed the conventional one in the whole spectrum of operating conditions, except for a narrow range of low operating temperatures and high ow rates. Floating radiation heat shields with small diameters and large shading angles enhanced the temperature uniformity of heat collection element and showed the highest enhancement ratios of both energy and exergy efciencies, which were up to 15.4 and 14.4%, respectively. A radiation heat shield with a diameter of 75 mm and a shading angle of 150 was found the best performing conguration for most operating conditions
Parabolic trough concentrator Radiation heat shield Ray tracing