Multi-objective optimization to enhance the performance of thermo-electric generator combined with heat pipe-heat sink under forced convection

Elghool, Ali and F., Basrawi and Ibrahim, Thamir K. and Ibrahim, Hassan and M., Ishak and Mohd Hazwan, Yusof and Bagaber, Salem Abdullah (2020) Multi-objective optimization to enhance the performance of thermo-electric generator combined with heat pipe-heat sink under forced convection. Energy, 208 (118270). pp. 1-21. ISSN 0360-5442 (Print), 1873-6785 (Online). (Published)

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The performance of Thermo-Electric Generator (TEG) is negatively affected by heat sink lack of design. The heat pipe heat sink (HP-HS) has the best performance compared to other conventional cooling systems which uses TEG. In medium temperature range below 300 °C, HP-HS is the most appropriate heat exchanger of the TEG. However, the effect of some parameters of fin space, fin length, fin height, fin materials and optimum geometry of the cold side of the TEG HP-HS under forced convection (FC) has not been fully studied. The objective of this paper is to conduct an analytical and statistical study on these parameters effect on the performance of the TEG. In addition, this paper determines the optimum geometry of HP-HS and materials of aluminum (AL) and copper (CO) at 250 °C of heat source temperatures. Central composite design model (CCD) has been used to design the experiments using response surface methodology (RSM). The multi-objective optimization using RSM is applied to determine the optimum geometry of HP-HS in terms of maximising the TEG power output (P), TEG efficiency (η), and minimising HP-HS cost ($). Compared with the literature, the results showed an improvement in TEG performance. The maximum P and η after optimization were 9.6 W and 3.3%, respectively. The percentage difference of TEG efficiency (η) compared with best previous results were, 18.78%. In addition, the CO HP-HS was found to be preferred over AL, because of its lower $/P, at 7.57 USD/W, as compared to AL, at 8.74 USD. Finally, this study shows an improvement in HP-HS cost; a reduction of 29% was achieved compared with the estimated HP-HS cost in literature.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Central composite designs; Heat source temperatures; Medium temperature; Optimum geometry; Parameters effects; Power out put; Response surface methodology; Statistical study
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Manufacturing Engineering
Institute of Postgraduate Studies
Faculty of Mechanical and Automotive Engineering Technology
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 20 Nov 2020 01:16
Last Modified: 20 Nov 2020 01:17
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