Invention | Free Full Text | Enhancing Heat Transfer in Thermoelectric Generator Heat Exchangers for Sustainable Cold Chain Logistics: Entropy and Exergy Analysis

Abstract

This study studies the combined application of thermoelectric power generation devices and cold chain logistics transportation vehicles, focusing on its efficiency and performance. Our experimental results highlight the influence of thermoelectric module properties, such as thermal conductivity and filling thickness of copper foam, on the energy utilization efficiency of the system. The specific experimental device involves a simulated logistics cold chain transport vehicle exhaust heat recovery thermoelectric power generation system, which consists of a high-temperature exhaust heat exchange channel and cooling water tanks on both sides. A thermoelectric module (TEM) is installed between the heat exchanger and the water tank, using the temperature difference to convert thermal energy into electrical energy. Analysis shows that using high-performance thermoelectric modules with lower thermal conductivity can better utilize temperature differences to generate electricity. Additionally, inserting porous metallic copper foam within the heat exchanger channels enhances convective heat transfer, thereby improving performance. Additionally, the study explores the concepts of exergy and entropy production, providing insights into system energy conversion processes and efficiency. Overall, this study provides valuable insights into optimizing the design and operation of thermoelectric generators in cold chain logistics transport vehicles to improve energy utilization and sustainability.