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Low-grade waste heat recovery by thermoelectric technology
You are invited to a SafeREnergy Seminar
Date: Tuesday, 20th August 2024
Time: 12:00pm – 1:00pm (AEST)
Join here: https://deakin.zoom.us/j/85465197172?pwd=uP4AbymtdFvP7QE3lwrm49kg73euEX.1&from=addon
Low-grade waste heat recovery by thermoelectric technology
Dr Weidi Liu, ARC DECRA Fellow/Lecturer, Queensland University of Technology
Thermoelectric technology, with the capacity of direct and reversible energy conversion between heat and electricity, has attracted extensive research interest. The performance of thermoelectric technology fundamentally dominated by the material dimensionless figure of merit, zT. And higher zT values of composing thermoelectric materials correspond to high energy conversion efficiency. Obtaining high zT values of thermoelectric materials is typically limited by the coupling relationship between sub-parameters of thermoelectric materials, including electrical conductivity, Seebeck coefficient, and thermal conductivity. Here, based on our state-of-art studies focusing on Bi2Te3- and Bi0.5Sb1.5Te3-based materials, we proposed the strategies of obtaining high-performance thermoelectric technologies by decoupling these relationships from material viewpoint, where the synergistic carrier concentration optimization under decoupled sub-parameters can contribute to high zT values in both n-type Bi2Te3-based and p-type Bi0.5Sb1.5Te3-based materials. Cost effectiveness analysis of thermoelectric technology for low-grade waste heat recovery demonstrates it holds extensive application potentials in steel industry.
Wei-Di Liu is currently a ARC DECRA Fellow/Lecturer at Queensland University of Technology, Australia. He received his Ph.D. from the University of Queensland, Australia, in 2020. His research interest lies in advanced functional materials, and is specially focusing on the understanding and development of novel thermoelectric materials, devices and applications.