Abstract
Electricity plays a significant role in daily life and is the main component of countless applications. Thus, ongoing research is necessary to improve the existing approaches, or find new approaches, to enhancing power generation. The thermoelectric generator (TEG) is among the notable and widespread technologies used to produce electricity, and converts waste energy into electrical energy using the Seebeck effect. Due to the Seebeck effect, temperature change can be turned into electrical energy; hence, a TEG can be applied whenever there is a temperature difference. The present paper presents the theoretical background of the TEG, in addition to a comprehensive review of the TEG and its implementation in various fields. This paper also sheds light on the new technologies of the TEG and their related challenges. Notably, it was found that the TEG is efficient in hybrid heat recovery systems, such as the phase change material (PCM), heat pipe (HP), and proton exchange membrane (PEM), and the efficiency of the TEG has increased due to a set of improvements in the TEG’s materials. Moreover, results show that the TEG technology has been frequently applied in recent years, and all of the investigated papers agree that the TEG is a promising technology in power generation and heat recovery systems.
Highlights
Electricity is one of humankind’s most significant scientific discoveries and is integral to our daily lives
This review has investigated the theoretical background of thermoelectric generator (TEG), besides a comprehensive review of TEG and its implementation in various fields, as well as it sheds light on new technologies of TEG and the manifested challenges
In several regions has conquered significant accomplishments in some applications and overall disappointment in others; TEG combined with heat exchangers (HE) is an up-and-coming technology, where HEs transfer the heat to the TEG, which helps create better circumstances to higher gradient temperature and, higher power output, which was illustrated in various studies; For waste heat recovery applications, TEGs are very promising as well because the heat is free and lost unless it is captured by a heat recovery method
Summary
Electricity is one of humankind’s most significant scientific discoveries and is integral to our daily lives. The temperature gradient, chemical energy, electromagnetic radiation, and light are forms of green energy that can be used to generate electricity via thermoelectric generators (TEGs), and the reaction, using the piezoelectric effect or turbines. The temperature gradient, chemical energy, electromagnetic radiation, and light are forms of green energy that can be used to generate electricity via thermoelectric generators (TEGs), and the reaction, induction, and photoelectric effects, respectively. Displaying the applications of thermoelectric (TE) in the past, starting from 1985, and Demonstrating the challenges that the researchers have faced during the study. This the expectations of TE applications for the foreseeable future, 2030; section is crucial as it is noticed that the progress of TEG development was by working. This section is crucial as it is noticed that the progress of TEG development was by working
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