All power cycles reject heat to ambient air, exhaust gasses, and/or liquid coolants. Heat recovery is the capture of a portion of the rejected thermal energy and its use in an economic manner. Recovered heat that is harnessed for effective use replaces purchased energy, reducing fuel consumption and cost, as well as emissions of harmful air or thermal pollutants. When heat recovery serves as a reliable source of supply, it can sometimes offset capital costs by reducing investment in conventional thermal energy-generating equipment.

Heat recovery is a fundamental element in many prime mover applications due to the low efficiency (20 to 40%) of power generation processes. For example, closed-cycle condensing steam turbines give up most of their exhaust energy to the environment through the condensing process; open-cycle internal combustion engines pass their exhaust energy directly to the environment. A large portion of this remaining energy may, in some cases, be captured and used in a secondary power cycle or to meet a variety of thermal loads.

Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

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