S. Harikrishnan received his B.E. in Electrical & Electronics Engineering from the University of Madras, in 2002. Also, he received his M.E. in Refrigeration & Air Conditioning Engineering and a Ph.D. in Faculty of Mechanical Engineering from Anna University, in the years 2007 and 2015, respectively. At present, he is working as Professor & Head in the Department of Mechanical Engineering at Kings Engineering College, Chennai, India. He is an active researcher in the fields of phase change materials, nanofluids, and supercapacitors. He has published many papers in refereed journals, and in conference proceedings. He is one of the recognized research supervisors at the Centre for Research, Anna University, Chennai. He guided two research scholars successfully in the fields of phase change materials and nanofluids. He is also one of the editorial team members in two Scopus indexed journals and one in the SCI-E journal. He served as the panel session chair, reviewer, and Managing Guest Editor for international conference proceedings. He has teaching and research experiences of 18 and 12 years, respectively.A.D. Dhass received his B.E., M.E., and Ph.D. degrees in Electrical and Electronics Engineering, Energy Engineering, and Solar Energy in 2005, 2009, and 2018 respectively, from Anna University, Chennai, India. At present, he is working as Assistant Professor at the Indus Institute of Technology and Engineering (IITE), Indus University, Ahmedabad, Gujarat, India. His areas of research include solar, heat transfer, and phase change materials.

• 1 Introduction; 2 NanoPCMs; 3 Synthesis and Characterization Techniques; 4 Phase Change Analysis; 5 NEPCMs for Cooling Applications; 6 NEPCMs for Heating Applications; 7 Composite PCMs for Thermal Energy Storage System; 8 Nanofluids; 9 Thermal Conductivity of Nanofluids; 10 Thermophysical Properties of Nanofluids; 11 Stability of Nanofluid; 12 Effect of Particle Volume Concentration; 13 Heat Transfer Mechanism in Nanofluid; 14 Hybrid Nanofluids; 15 Applications of Nanofluids and PCMs

S. Harikrishnan received his B.E. in Electrical & Electronics Engineering from the University of Madras, in 2002. Also, he received his M.E. in Refrigeration & Air Conditioning Engineering and a Ph.D. in Faculty of Mechanical Engineering from Anna University, in the years 2007 and 2015, respectively. At present, he is working as Professor & Head in the Department of Mechanical Engineering at Kings Engineering College, Chennai, India. He is an active researcher in the fields of phase change materials, nanofluids, and supercapacitors. He has published many papers in refereed journals, and in conference proceedings. He is one of the recognized research supervisors at the Centre for Research, Anna University, Chennai. He guided two research scholars successfully in the fields of phase change materials and nanofluids. He is also one of the editorial team members in two Scopus indexed journals and one in the SCI-E journal. He served as the panel session chair, reviewer, and Managing Guest Editor for international conference proceedings. He has teaching and research experiences of 18 and 12 years, respectively.A.D. Dhass received his B.E., M.E., and Ph.D. degrees in Electrical and Electronics Engineering, Energy Engineering, and Solar Energy in 2005, 2009, and 2018 respectively, from Anna University, Chennai, India. At present, he is working as Assistant Professor at the Indus Institute of Technology and Engineering (IITE), Indus University, Ahmedabad, Gujarat, India. His areas of research include solar, heat transfer, and phase change materials.

• 1 Introduction; 2 NanoPCMs; 3 Synthesis and Characterization Techniques; 4 Phase Change Analysis; 5 NEPCMs for Cooling Applications; 6 NEPCMs for Heating Applications; 7 Composite PCMs for Thermal Energy Storage System; 8 Nanofluids; 9 Thermal Conductivity of Nanofluids; 10 Thermophysical Properties of Nanofluids; 11 Stability of Nanofluid; 12 Effect of Particle Volume Concentration; 13 Heat Transfer Mechanism in Nanofluid; 14 Hybrid Nanofluids; 15 Applications of Nanofluids and PCMs

S. Harikrishnan received his B.E. in Electrical & Electronics Engineering from the University of Madras, in 2002. Also, he received his M.E. in Refrigeration & Air Conditioning Engineering and a Ph.D. in Faculty of Mechanical Engineering from Anna University, in the years 2007 and 2015, respectively. At present, he is working as Professor & Head in the Department of Mechanical Engineering at Kings Engineering College, Chennai, India. He is an active researcher in the fields of phase change materials, nanofluids, and supercapacitors. He has published many papers in refereed journals, and in conference proceedings. He is one of the recognized research supervisors at the Centre for Research, Anna University, Chennai. He guided two research scholars successfully in the fields of phase change materials and nanofluids. He is also one of the editorial team members in two Scopus indexed journals and one in the SCI-E journal. He served as the panel session chair, reviewer, and Managing Guest Editor for international conference proceedings. He has teaching and research experiences of 18 and 12 years, respectively.A.D. Dhass received his B.E., M.E., and Ph.D. degrees in Electrical and Electronics Engineering, Energy Engineering, and Solar Energy in 2005, 2009, and 2018 respectively, from Anna University, Chennai, India. At present, he is working as Assistant Professor at the Indus Institute of Technology and Engineering (IITE), Indus University, Ahmedabad, Gujarat, India. His areas of research include solar, heat transfer, and phase change materials.

• 1 Introduction; 2 NanoPCMs; 3 Synthesis and Characterization Techniques; 4 Phase Change Analysis; 5 NEPCMs for Cooling Applications; 6 NEPCMs for Heating Applications; 7 Composite PCMs for Thermal Energy Storage System; 8 Nanofluids; 9 Thermal Conductivity of Nanofluids; 10 Thermophysical Properties of Nanofluids; 11 Stability of Nanofluid; 12 Effect of Particle Volume Concentration; 13 Heat Transfer Mechanism in Nanofluid; 14 Hybrid Nanofluids; 15 Applications of Nanofluids and PCMs