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Analysis and Optimization of Sb2Te3 and Bi2Te3 Materials for Enhancing the Performance of Thermoelectric Energy Harvester for WSN Applications

Author(s):

Gourav Verma and Vidushi Sharma*   Pages 1 - 10 ( 10 )

Abstract:


Thermoelectric (TE) materials are used to fabricate the thermoelectric generator (TEG). TEG is used to convert thermal energy into electrical energy and vice-versa. Bismuth-Telluride and Antimony Telluride (Bi/Sb)2Te3 alloys are popular in the research community due to its capability of electrical energy generation in the range of room temperature. The Phase Change Material (PCM) is a good source of thermal energy storage in thermal energy harvesting. We have reviewed patents having the information of thermal energy storage and tried to provide better cost effective solution in thermal energy harvesting. Finding the most appropriate TE alloy for particular application is a challenge in the research community. In this paper, a study and analysis of performance parameter of (Bi/Sb)-Te based TE alloy has been done. An investigation over a wide range of temperature is performed. A Bi2Te3 based Commercial-of-the-shelf (COTS) TEG has been experimentally tested in controlled temperature environment for the analysis of its efficiency. This is found that a maximum efficiency of 2.12% is achieved at a temperature difference of 60oC. This investigation will be useful for the selection of material for thermal energy harvesting techniques and helps to provide optimized framework for the research community to decide the (Bi1-xSbx)2Te3 mixed crystal alloy for their applications.

Keywords:

Thermal Energy harvesting, WSN, Bismuth Telluride, Sb2Te3, Bi2Te3, Thermoelectric generator, PCM

Affiliation:

Electronics and Communication Dept., Gaurav Verma, Northern India Engineering College, Delhi, SoICT, Vidushi Sharma, Gautam Buddha University, Greater Noida



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