AN INVESTIGATIVE METHODOLOGY THROUGH SOLID MODELLING AND NUMERICAL ANALYSIS FOR DESIGNING A THERMO-ELECTRIC GENERATOR SYSTEM

Abstract

This product development research project proposes a simplified novel methodology to design a thermo-electric generation (TEG) system. The iterative designs of complete assembly were prepared with the aid of Solidworks and the subsequent FEM analysis was aided by ANSYS fluent and transient thermal workbenches. The combustion chamber was subjected to a computational fluid dynamic study to generate flame profiles and to establish the temperature gradient distribution along the vertical length of inner surface of cylindrical chamber. The results of CFD analysis were then transported to the transient thermal workbench to calculate the charging time of whole system, which indeed founds the issues related to starting fuel efficiency of the system. A section model of the assembly was used to conduct the transient heat transfer analysis. The final results showed that after formation of a steady temperature gradient at the inner surface, the time required to completely charge up the system to achieve steady state came to be 30 minutes, which was found to be in good agreement with the operational constraints. Also, the temperature differences obtained between the hot and cold sides of TEG MARS modules were well within the safe limits. NOx emissions were also plotted and analysed.

Keywords

• TEG,Seebeck Effect,FEM Analysis,Transient Heat Transfer,Charging Time

References

1. [1] Shakun W, Bearden JH, Henderson DR. Thermoelectric Generator. US4734139 1988.
2. [2] Arsie I, Cricchio A, Pianese C, Ricciardi V, DeCesare M. Modeling Analysis of Waste Heat Recovery via Thermo-Electric Generator and Electric Turbo-Compound for CO2 Reduction in Automotive SI Engines. ATI 2015 -70thConference of the ATI Engineering Association. Energy Procedia 2015; 82: 81 – 88. doi: 10.1016/j.egypro.2015.11.886.
3. [3] Kryotherm Inc. Introduction into thermo-electric power generation. Catalogue report.
4. [4] Liu C, Chen P, Li K. A 500W low temperature thermoelectric generator: Design and experimental study. International journal of hydrogen energy 2014; 39: 15497-15505. doi.org/10.1016/j.ijhydene.2014.07.163.
5. [5] Al-Habahbeh OM., Mohammad A, Al-khalidi A, Khanfer M, Obeid M. Design optimization of a large-scale thermoelectric generator. Journal of King Saud University – Engineering Sciences 2018; 30: 177–182. doi.org/10.1016/j.jksues.2016.01.007
6. [6] Aimable N. Design, modeling, and fabrication of thermoelectric generator for waste heat recovery in local process industry. University of Agder, 2017.
7. [7] Tang ZB, Deng YD, Su CQ, Shuai WW, Xie CJ. A research on thermoelectric generator's electrical performance under temperature mismatch conditions for automotive waste heat recovery system; Case Studies in Thermal Engineering 2015; 5: 143–150. .doi.org/10.1016/j.csite.2015.03.006.
8. [8] Ecogen Technology; Gas fuel thermo-electric generator GTEG 500-A; Catalogue report.

9. [9] Ecogen Technology, Thermo-Electric Generator systems Design and performance Catalogue; 2015.
10. [10] Cengel Y. Heat Transfer A Practical Approach: Second Edition; McGraw Hill Publication; 2002.
11. [11] Chen L, Meng F, Sun F. Maximum power and efficiency of an irreversible thermoelectric generator with a generalized heat transfer law. Scientia Iranica B 2012; 19:1337–1345. doi:10.1016/j.scient.2012.07.014
12. [12] Mackowski DW, Conduction of heat transfer notes for mech 7210. [Lecture] Mechanical Engineering Department; Auburn University, [Accessed 21th April 2020].
13. [13] Li W, Paul MC, Montecucco A, Siviter J, Knox AR, Sweet T, Gao M, Baig H, Mallick TK, Han G, Gregory DH, Azough F, Freer R. Multiphysics simulations of thermoelectric generator modules with cold and hot blocks and effects of some factors. Case Studies in Thermal Engineering 2017; 10: 63–72. doi.org/10.1016/j.csite.2017.03.005.
14. [14] Kim CN. Development of a numerical method for the performance analysis of thermoelectric generators with thermal and electrical contact resistances. Applied thermal engineering 2018; 1: 408-417. doi.org/10.1016/j.applthermaleng.2017.10.158.
15. [15] Rodrigo CRL, Manoel FMN; Danielle RSG. CFD modelling of small scale cyclonic combustor chamber using bio-mass powder. Energy Procedia 2017; 120: 556-563. doi.org/10.1016/j.egypro.2017.07.208.
16. [16] Hernik B, Latacz G, Znamirowski D. A numerical study on combustion process for various configurations of burners in the novel ultra supercritical BP-680 boiler furnace chamber. Fuel Processing Technology 2016; 152: 381-389. doi.org/10.1016/j.fuproc.2016.06.038.
17. [17] Turbulence Intensity wiki; CFD online; Available from: https://www.cfd-online.com/Wiki/Turbulence_intensity, [Accessed 21th April 2020].
18. [18] Keryeyen S, Ilbas M. Experimental and numerical analysis of turbulent premixed combustion of low calorific value coal gases in a generated premixed burner. Fuel 2018; 220: 586-598. doi.org/10.1016/j.fuel.2018.02.052.
19. [19] Yilbas BS, Ali H, Al-Sharafi A. Innovative design of a thermoelectric generator with extended and segmented pin configuration. Applied Energy 2017;187: 367-379. doi.org/10.1016/j.applthermaleng.2017.05.066
20. [20] Thorp W. Design of thermo-electric generator modules using silicon-germanium alloy. Power sources. Elsevier 1967; 613-625. doi.org/10.1016/B978-0-08-012176-5.50045-1
21. [21] Meng JH, Zhang XX, Wang XD. Characteristic study and parametric study of a thermoelectric generator by considering variable material properties and heat losses. International journal of heat and mass transfer 2015; 80: 227-235. doi.org/10.1016/j.ijheatmasstransfer.2014.09.023.
22. [22] Duda P; A method of transient thermal load estimation and its application to identification of aerodynamic heating on atmospheric re-entry capsule; Aerospace science and technology 2016; 51: 26-33. doi.org/10.1016/j.ast.2016.01.015.
23. [23] Nabil M, Khodadadi JM. Computational/analytical study of the transient hot wire-based thermal conductivity measurements near phase transition. International journal of heat and mass transfer 2017; 187: 895-907. doi.org/10.1016/j.ijheatmasstransfer.2017.04.043.
24. [24] Manjunath HN, Aithal SK, Kumar LH, Babu NR, Auradi V. Transient thermal investigations during external chilling of Al-18% Si Castings through experimental and finite element modelling. Materials today proceedings 2018; 5: 7191-7197. doi.org/10.1016/j.matpr.2017.11.385.