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Battery Charging Considerations in Small Scale Electricity Generation from a Thermoelectric Module
ROBINSON, ANTHONY; O'SHAUGHNESSY, SEAMUS
This project involves the development of a prototype electrical gen erator for delivering and storing small amounts of electricity. Power is generated using the thermoelectric effect. A single thermoelectric generator (TEG) is utilised to convert a small portion of the heat flowing through it to electricity. The electricit y produced is used to charge a single rechargeable 3.3 Volt lithium - iron phosphate battery. This study investigates methods of delivering maximum power to the battery for a range of temperature gradients across the thermoelectric module. The paper explore s load matching and maximum power point tracking techniques. It was found that, for the TEG tested, a SEPIC DC - DC converter was only beneficial for temperature gradients less than 100 ? C across the TEG. At a temperature gradient of 150 ? C, the effective re sistance of the battery was close to the internal resistance of the TEG. For temperature gradients in excess of 100 ? C a DC - DC converter is not suggested and a simple charge protection circuit is sufficient.
Keyword(s): Thermoelectricity; Electricity Generation; Load Matching; Maximum Power Point Tracking; International Development; Smart & Sustainable Planet
Publication Date:
2014
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: Trinity College Dublin
Citation(s): C.E. Kinsella, S.M. O'Shaughnessy, M.J. Deasy, M. Duffy, A.J. Robinson, Battery Charging Considerations in Small Scale Electricity Generation from a Thermoelectric Module, Applied Energy, 114, 2014, 80 - 90
First Indexed: 2015-09-17 05:10:16 Last Updated: 2020-10-30 07:11:35