The finite nature of fossil fuels such as coal, oil and natural gas, the increasing worry about the "greenhouse" effect and the growing amount of power used in the world means that alternative energy sources such as wind, tide and sun must be seriously considered. But this will take time and money. In the immediate future the most direct and cost-effective way to tackle the problem is to conserve existing sources of energy and this book concentrates on this theme. It looks at energy conversion, giving an analytical treatment of energy saving and recovery, and shows the means for calculating the financial viability of energy schemes through worked examples and case studies. It is suitable for any engineering course where energy studies forms a part, including mechanical, chemical, environmental and building services. It should also be of interest to Energy Managers in industry.