This book discusses recent work on the use of nanoparticles in energy and environment-related work. This book presents experimental, numerical, analytical, and theoretical work on the use of nanomaterials in energy and environment. This book helps to highlight cutting-edge research and is a ready reference for the researchers working in this arena of academia and industries. This book provides insights related to various forms of nanotechnological applications in green buildings, environmental and electrochemical, solar distillation systems, green energy, storage tank of the SWH system, solar concentrator system's receiver, and CFD simulations of various aspects of nanofluids/hybrid nanofluids, which are particularly useful, valuable for the betterment of society.