Visualization of thermal characteristics around the absorber tube of a standard parabolic trough thermal collector by 3D simulation

Islam, Majedul, Karim, Azharul, Saha, Suvash C., Yarlagadda, Prasad K., Miller, Sarah , & Ullah, Ihsan (2012) Visualization of thermal characteristics around the absorber tube of a standard parabolic trough thermal collector by 3D simulation. In Gu, YuanTong & Saha, Suvash C. (Eds.) Proceedings of the 4th International Conference on Computational Methods (ICCM2012), School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Crowne Plaza, Gold Coast, Australia.

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Abstract

Three dimensional conjugate heat transfer simulation of a standard parabolic trough thermal collector receiver is performed numerically in order to visualize and analyze the surface thermal characteristics. The computational model is developed in Ansys Fluent environment based on some simplified assumptions. Three test conditions are selected from the existing literature to verify the numerical model directly, and reasonably good agreement between the model and the test results confirms the reliability of the simulation. Solar radiation flux profile around the tube is also approximated from the literature. An in house macro is written to read the input solar flux as a heat flux wall boundary condition for the tube wall. The numerical results show that there is an abrupt variation in the resultant heat flux along the circumference of the receiver. Consequently, the temperature varies throughout the tube surface. The lower half of the horizontal receiver enjoys the maximum solar flux, and therefore, experiences the maximum temperature rise compared to the upper part with almost leveled temperature. Reasonable attributions and suggestions are made on this particular type of conjugate thermal system. The knowledge that gained so far from this study will be used to further the analysis and to design an efficient concentrator photovoltaic collector in near future.

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ID Code: 58347
Item Type: Conference Paper
Refereed: Yes
Keywords: Solar energy, parabolic trough collector, computational analysis
ISBN: 978-1-921897-54-2
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Solution of Differential and Integral Equations (010302)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 please consult the authors
Deposited On: 18 Mar 2013 04:48
Last Modified: 20 Mar 2013 04:46

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