Thermal fluid energy system design has a major role in the field of engineering science and technology from an undergraduate level course up to various research level programmes. This book offers a fundamental employed knowledge of ‘design and analysis of thermal fluid energy systems,’ ‘permitting users to effectively formulate’ and ‘optimize and examine’ their own design projects. This book provides a merit in the pool of knowledge and intelligence for undergraduate, postgraduate, research level courses (higher education) and professionals from industries. This book is well written and organized in a presentable form to provide an excellence in the design of thermo-fluid systems with the basic concepts, laws, tools and practical examples. The selection of topics is good and provides an attentive review of basic thermal fluid engineering fundamentals. It presents the engineering design process in a practical way with especially highlighted engineering economy concepts with optimization. It also covers numerical and computational methodologies with an introduction of EES software. The material inside the book fits attractively with the kind of industrial practice for the students after graduation. Overall, it can be said the present book is well organized and useful for the persons from academia and industry (i.e., for designers and researchers). This book also offers the elementary concepts of simulation and optimization with some good approachable techniques that can be applied to a system model. It addresses: hydraulic systems, energy systems, thermal engineering concepts, principles of engineering economics, application of conservation and balance laws, fluid flow fundamentals, series and parallel pipe networks and pump systems, pump performance and selection, cavitation, the affinity laws for pumps, heat exchangers and their types, LMTD, and e-NTU methods, regenerative HX, condensers, evaporators, and boilers, thermal energy system simulation, fitting component performance data, optimization using Lagrange multipliers, optimization using software and use of EES. In addition, it incorporates both the SI and English units and develops state-of-the-art computer simulation.