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040 _aEG-GiCUC
_beng
_cEG-GiCUC
041 0 _aeng
049 _aDeposite
097 _aM.Sc
099 _aCai01.13.11.M.Sc.2021.Ma.I
100 0 _aMahmoud Medhat Ibrahim Elbakry
245 1 3 _aAn investigation of passive performance enhancement of parabolic trough solar concentrators using internal radiation heat shields /
_cMahmoud Medhat Ibrahim Elbakry ; Supervised Mahmoud A.Kassem , Muhammed A. Hassan
246 1 5 _aدراسة التحسن فى أداء المركزات الشمسية ذات القطع المكافئ المستخدمه للدروع الحرارية الانعكاسية الداخلية
260 _aCairo :
_bMahmoud Medhat Ibrahim Elbakry ,
_c2021
300 _a69 P. :
_bcharts , facsimiles ;
_c30cm
502 _aThesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering
520 _aThis 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 {uFB02}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 {uFB02}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 ef{uFB01}ciencies, 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{u00B0} was found the best performing con{uFB01}guration for most operating conditions
530 _aIssued also as CD
653 4 _aParabolic trough concentrator
653 4 _aRadiation heat shield
653 4 _aRay tracing
700 0 _aMahmoud A.Kassem ,
_eSupervisor
700 0 _aMuhammed A. Hassan ,
_eSupervisor
856 _uhttp://172.23.153.220/th.pdf
905 _aNazla
_eRevisor
905 _aShimaa
_eCataloger
942 _2ddc
_cTH
999 _c81912
_d81912