Sunil Kumar Singal is presently working as a Professor and Head of Department, Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee. Prof. Singal obtained his Ph.D. on Optimization of low head small hydro installations from the Indian Institute of Technology (IIT) Roorkee. He started his professional career as a Scientist at IIT Roorkee in 1984. He has more than 36 years of experience working on hydro energy and has successfully supervised 8 Ph.D. students and 80 Masters students in the fields of hydro energy and other renewable sources. Prof. Singal has published more than 200 technical manuscripts in the form of books, book chapters, journals, and conference proceedings. His research interests include small hydropower resource assessments and planning, designs of civil works, cost optimization and tariff analysis, integrated renewable energy systems, planning of water resources etc. He is a recipient of the Distinguished Scientist award- VIFRA 2015, Best Citizens of India Award – 2016, The Institution of Engineers (India) Excellence Award 2018, and Research Peace Award 2019-20. Varun Goel is working as Associate Professor in the Department of Mechanical Engineering at the National Institute of Technology Hamirpur. His area of research includes but is not limited to Heat Transfer, CFD and Renewable Energy. He is the recipient of the prestigious ‘Bhaskara Advanced Solar Energy (BASE) Fellowship (2018)’ for his work in the area of Solar Energy and worked at the University of South Florida Tampa. Apart from this, he is the recipient of Hari Om Ashram Prerit Research Award on Renewable Energy for his work on “Life cycle Assessment of Small Hydropower systems in India”, the Institution of Engineers India Young Engineer Award, and the ISTE-SGSITS National Award for Young Teachers. He has published more than 140 papers in journals/conferences. He is a Fellow of the Institution of Engineers (India) and member of several national and international professional bodies. Himanshu Nautiyal is an Assistant Professor and Head of Department, Mechanical Engineering Department at THDC Institute of Hydropower Engineering & Technology, India. His research areas include Renewable Energy Technologies, Sustainability and Life Cycle Assessment. He has published various research papers in journals and contributed chapters in books published at the international level. He is actively engaged as a reviewer of various journals and is a lifetime member of several national and international professional bodies. Dimitris Papantonis is an Emeritus Professor at the National Technical University of Athens (NTUA), Greece, where he has been a professor since 1981. He is the former Director of the Laboratory of Hydraulic Turbomachines, Head of the School of Mechanical Engineering, and Vice-Rector at NTUA. His research interests include Hydraulic Machines, Hydroelectric Plants, Fluid Mechanics and Numerical Simulation, and Hydraulic transients.