Hussam Jouhara is a Professor of Thermal Engineering, a Fellow of the Royal Academy of Engineering and Vice Dean - Research at the College of Engineering at Brunel University of London, a Visiting Chief Researcher in Vytautas Magnus University. Professor Reay manages David Reay & Associates, UK, and he is a Visiting Professor at Northumbria University, Emeritus Professor at Newcastle University, and Honorary Professor Brunel University London, UK. His main research interests are compact heat exchangers, process intensification, and heat pumps. He is also Editor-in-Chief of Thermal Science and Engineering Progress and Associate Editor of the International Journal of Thermofluids, both are published by Elsevier. Prof. Reay is the Author/Co-author of eight other books. Dr McGlen is the Advanced Technology Manager at Boyd’s UK facility, where he leads research and development of future heat pipe technologies and hi-tech commercial applications. Research interests include patented additive manufactured heat pipe technology, heat pipe fluids and materials combinations, novel heat pipe geometry, wick construction and heat pipe functionality. He has over 20 years’ experience in commercial electronic thermal management application, with main focus areas in the Space, Aerospace & Defence and Automotive application. Dr McGlen is a chartered engineer (MIMechE) and is a Royal Academy of Engineering Visiting Professor in Practice at Newcastle University. Peter Kew first became involved in heat pipes in the late 1970s as a research officer with International Research and Development (IRD) working on a range of heat transfer and energy conservation projects, including heat pipe development which was then led by David Reay. He has maintained this interest in this area for 40 years at IRD and then as a Lecturer and Senior Lecturer at Heriot-Watt University and as Associate Head of the University’s School of Engineering and Physical Sciences, responsible for the School’s activities on the Dubai Campus of the University. On retirement from Heriot-Watt he has been active as a consultant. Dr McDonough is a Lecturer in Chemical Engineering in the School of Engineering at Newcastle University and is an Associate Member of IChemE. His expertise resides in additive manufacturing and its application to areas such as reaction engineering, flow chemistry, fluid mechanics, heat transfer, fluidisation, and carbon capture. One of Dr McDonough’s key research themes is to exploit additive manufacturing for the fabrication of new and novel reactor geometries that can unlock previously unobtainable operating windows, paving the way for potentially new chemistries and processes. He is actively involved in several complementary projects that explore different aspects of this goal.