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Abstract
Thermal switches are typically used to regulate the heat flow between two surfaces. They are broadly categorized as mechanical, gas-gap, superconducting, and magneto-resistive heat switches. Among these, the mechanical heat switches can be used in a wide temperature range of 5–400 K. Based on different actuation methods, the mechanical heat switches can be further subclassified in piezoelectric actuated, paraffin wax, differential thermal expansion, and shape memory alloy type of heat switches. This work presents a broad overview of different kinds of mechanical heat switches and compares their performances as well as physical parameters. The review suggests that differential thermal expansion types can enforce approximately 30 times extra contact force, whereas the shape memory heat switches have the highest switching ratio among the other types of mechanical heat switches. Moreover, the paraffin wax types of heat switches have minimum response time, while the piezo-electric types are relatively poor in performance due to the lesser contact area.
Acknowledgment
Authors thank ICFAMMT -2022 organizing committee for providing an opportunity to showcase our research work on heat switches for engineering and space applications.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Banka Raghu Ram
Banka Raghu Ram received his M-Tech (2022) in Mechanical Engineering from the National Institute of Technology (NIT) Rourkela. He received his B-Tech in Mechanical Engineering from Avanthi Research and Technological Academy (ARTB) Vizianagaram in 2020. Currently, he is working on the ISRO project “Design and development of Magneto Resistive Heat Switch”.
Vinit Malik
Vinit Malik received his M-Tech (2022) in Mechanical Engineering from the National Institute of Technology (NIT) Rourkela. He received his B-Tech in Mechanical Engineering from Dr. A.P.J. Abdul Kalam Technical University in 2019. Currently, he is working on the ISRO project “Design and development of Magneto Resistive Heat Switch”.
Bukke Kiran Naik
Bukke Kiran Naik is an Assistant Professor in Mechanical Engineering Department at NIT Rourkela since 2020. He received both his Ph.D. (2019) and M-Tech (2014) from IIT Guwahati and B-Tech (2012) from JNTU Anantapur in Mechanical Engineering. He worked as a Queen Elizabeth Postdoctoral fellow at Simon Fraser University, Canada during 2019–2020 and as Project Engineer at IIT Guwahati in 2019. Further, he was selected as Young Indian Scientist to the 6th BRICS (Brazil, Russia, India, China, and South Africa) conclave 2021 in the thematic area of Energy Solutions and he also received an INAE fellowship for working as a visiting researcher at IIT Kanpur.
Kishore Singh Patel
Kishore Singh Patel is an Assistant Professor in Mechanical Engineering Department at NIT Rourkela from 2020. He received his Ph.D. in 2018 from IISc Bangalore, India. He has received JNCASR Central Fellowship and fellowship from DRDO-CARS research grant during the Postdoctoral research in between 2017 to 2020.