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This book offers an in-depth description of absorption chillers and heat pumps, focusing on relatively simple systems that employ working fluids in the liquid and vapor phase. The book provides a thorough explanation of how thermodynamic and transport properties of working fluid mixtures enable them to influence the performance of absorption systems. The student or engineer who is a newcomer to the field will gain a comprehensive knowledge essential for the design and evaluation of absorption systems.
This book is the result of a long-term co-operative research and professional development programme between the Instituto de Investigaciones Electricas (IIE), Mexico, and the University of Salford, UK. It provides the design basis for the fabrication of small and large scale commercial absorption heat pump systems, and includes a comprehensive treatment of the economics of heat pump systems. It charts the development of heat pump technology from theoretical principles to the operation of practical systems for the purification of water, both for human consumption and a wide variety of industrial purposes.
Design and Build Safe, Efficient Systems for Irrigation and Water Supply
"Water Wells and Pumps" is a comprehensive guide to the essential theory and design of ground water structures, wells/tube wells, and pumps, with particular emphasis on problem solving and meeting the requirements of developing nations. It features thorough, up-to-date knowledge of the science and technology of water wells and pumps as well as allied appliances and applications.
This authoritative desk reference outlines the construction, operation, and maintenance of water wells for irrigation and water supply. It also presents the development and testing of tube wells as well as a variety of pumps, both location-specific. Using SI units exclusively, "Water Wells and Pumps" features: Coverage of a variety of pumps, including those using nonconventional, environmentally friendly means Examinations of ground water recharge methods, well rehabilitation, and animal-powered water lifts Techno-economic evaluation of projects on wells and pumps References and problems at the end of each chapter for research and educational use
Solutions for all problems related to designing secure, reliable systems - Ground water resources development and utilization - Hydraulics of wells - Open wells - Tube wells and their designs - Development and testing of tube wells - Rehabilitation of sick and failed tube wells - Man- and animal-powered water lifts and positive displacement pumps - Variable displacement pumps and accessories - Centrifugal pumps - Deep well turbine and submersible pumps - Propeller, mixed flow, and jet pumps - Applications of nonconventional energy sources in pumping
With the world population set to reach 9 billion by the year 2050, and food demand expected to increase by 60 per cent during the same period, one of the key issues facing the world is food security. Major changes in policy and management, across the entire agricultural production chain, will be needed to ensure the best use of available water resources in meeting growing demands for food and other agricultural products. This new volume in the successful History of Water Series focuses on the African continent to address this key issue. Humanity has its roots in Africa and many of our food systems developed there. All types of agricultural production are present and the sheer size of the continent offers wide ecological variation from extreme desert to dense rainforest. Drawing together leading international contributors from a wide variety of disciplines Water and Food offers new insights into the evolution of food systems, from early hunter gatherers to the global challenges of the modern world.
With this easy-to-use activity book you can create one funny face after another on a big, fat pumpkin. Choose from 34 full-colour reusable stickers displaying toothy grins, curly mustaches, pointy ears, and other humorous features. Then apply them to just the right places on the giant pumpkin shown on the inside covers. You can use the stickers over and over again to make your own jack-o'-lantern with as many different faces as you can imagine.
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