Thermal and Thermoelectric Generation Using Geothermal Energy Extraction Through Cogeneration System

Authors

  • Carlos Armenta-Deu Faculty ofPhysicalSciences, DepartmentofStructureofMatter, ThermalPhysics and Electronics,Universidad Complutense de Madrid, 28040 Madrid, Spain
  • Leticia Bottazzi Faculty of physical sciences, DepartmentofStructureofMatter, ThermalPhysics and Electronics, Universidad Complutense de Madrid, 28040 Madrid, Spain

DOI:

https://doi.org/10.37591/joaest.v11i1.3593

Abstract

The manuscript has focused on the evaluation of the improvement of energy efficiency in using geothermal energy for heat and electricity generation through additional thermoelectric production to conventional heat transfer processes. The proposed system uses Peltier rings made up of a serial and parallel Peltier cells grouping, as part of the upward and downward ducts that connect the geothermal heat exchanger and the surface heating system. The new system can improve performance related to conventional operating mode. As thermoelectric generation does not reduce working fluid temperature significantly, available heating power is preserved, thus improving overall efficiency. The new system operates, therefore, under cogeneration mode, being consistent with energy efficiency principles, which ensures an improvement of system performance related to conventional operating mode. Tested thermodynamic efficiency has been around 50%, which is a very good value if compared to conventional thermal systems. Global efficiency, including mechanical aspects, is reduced to 21.5%, which is comparable to current overall efficiencies of conventional systems. This efficiency is, however, improved up to 26%, if thermoelectric conversion is produced. The system operates at its higher efficiency mode in cold climates where thermoelectric conversion is more effective.

Keywords: Cogeneration, efficiency improvement, geothermal energy, thermoelectric conversion

Cite this Article
Carlos Armenta Deu, Leticia Bottazzi Thermal and Thermoelectric Generation
Using Geothermal Energy Extraction Through Cogeneration System Journal of
Alternate Energy Sources & Technologies.2020 ; 11(1): 58-71 p.

Author Biographies

  • Carlos Armenta-Deu, Faculty ofPhysicalSciences, DepartmentofStructureofMatter, ThermalPhysics and Electronics,Universidad Complutense de Madrid, 28040 Madrid, Spain
    Faculty ofPhysicalSciences, DepartmentofStructureofMatter, ThermalPhysics and Electronics,Universidad Complutense de Madrid, 28040 Madrid, Spain
  • Leticia Bottazzi, Faculty of physical sciences, DepartmentofStructureofMatter, ThermalPhysics and Electronics, Universidad Complutense de Madrid, 28040 Madrid, Spain
    Faculty of physical sciences, DepartmentofStructureofMatter, ThermalPhysics and Electronics,Universidad Complutense de Madrid, 28040 Madrid, Spain

References

Huenges Ernst. Geothermal Energy Systems Exploration, Development, and Utilization. Wiley Online library; 2011.

Grant Malcolm, A Bixley, Paul F. Geothermal Reservoir Engineering. Second Edition. Academic Press; 2011.

DiPippo Ronald Geothermal power plants: principles, applications, case studies, and environmental impact. 3rd edition. Elsevier; 2013.

Di Sipio Eloisa, Bertermann David. Factors influencing the thermal efficiency of horizontal ground heat exchangers. Special Issue Low Enthalpy Geothermal Energy.

Energies. 2017; 10(11): 1897. https://doi.org/10.3390/en10111897

Dunstall M, Freeston DH. Downhole heat exchanger experiments: Rotoroa Geothermal Field. University of Auckland, Auckland, New Zealand. 1995; 10(11).

Lund John W. Direct heat utilization of geothermal resources. Renewable Energy. 1997; 10(2–3): 403–408.

Dincer Ibrahim, Ozcan Hasan. Geothermal Energy. In book: Comprehensive Energy Systems. 2019; 702–732. doi: 10.1016/B978-0-12-809597-3.00119-X

Sigfússon Bergur, Uihlein, Andreas. JRC Geothermal Energy Status Report. Technology, market and economic aspects of geothermal energy in Europe. JRC Science Hub. 2015.

Val Pierce. Introduction to Geothermal Power. Delhi: The English Press; 2011.

https://www.hdblog.it/2012/12/30/panasonic-presenta-il-sistema-che-genera-corrente-attraverso-tubi-termoelettrici-video/

Muñoz Zurdo, Ricardo. Design of a thermoelectric system taking advantage of geothermal characteristics. BS thesis Polytechnic University of Catalonia, 2013.

Çengel Yunus, Cimbala John. Fluid Mechanics Fundamentals and Applications. Original from the University of California. McGraw-Hill; 2006.

White Frank. Fluid Mechanics. 5th edition. Boston: McGraw-Hill; 2006.

Miskolc Aniko Toth. Flow-and-Heat-Transfer-in-Geothermal-Systems. Science Direct. Hungary: Elsevier; 2016.

Goldsmid Julian H. Introduction to Thermoelectricity. Springer Series in Material Science. Springer; 2010.

Rowe DM. CRC Handbook of Thermoelectrics. CRC Press. 720 pages. July 1995.

Downloads

Published

2020-05-06

Issue

Vol. 11 No. 1 (2020)

Section

Research Article

License

It is herein agreed that: The copyright to the above-listed unpublished and original article is transferred to STM Journals. This copyright transfer covers the exclusive right to reproduce and distribute the contribution, including reprints, translations, photographic reproductions, microform, electronic form (offline, online), or any other reproductions of similar nature. I/We declare that above manuscript is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere. I/ We warrant(s) that his/her/their contribution is original, except for such excerpts from copyrighted works as may be included with the permission of the copyright holder and author thereof, that it contains no libelous statements, and does not infringe on any copyright, trademark, patent, statutory right, or propriety right of others. I/We will not publish his/her/their above said contribution anywhere else without the prior written permission of the publisher unless it has been changed substantially.
I/We also agree to the authorship of the article in the following order:
Author(s) Name Signature(s)
1. ________________
2. ________________
3. ________________
4. ________________
The author(s) agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal (comments if any to the editor can be added below).