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WASTE HEAT MANAGEMENT IN THE ELECTRIC POWER INDUSTRY

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WASTE HEAT MANAGEMENT IN THE ELECTRIC POWER INDUSTRY ( waste-heat-management-inelectric-power-industry )

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about two thirds of the energy of the prime mover is lost in the form of "waste heat" discharged into rivers, lakes, oceans and the atmosphere. In view of the national goal of conservation of energy resources, this appears to be a highly wasteful process and suggests that any effort to improve this efficiency should be pursued. Also, since all large steam- electric power plants use water for steam condensation, there are environ- mental impacts as well as large water requirements associated with the coolingprocess. Themanagementofwasteheatfromsteam-electricpower plants is thus significant with regard to environmental impacts and the potential for energy and water conservation. The MIT research program deals with one area in which all these factors come together -- namely, the selection of the waste heat rejection system. 1.2 Waste Heat Management The objective of waste heat management is to find economically and socially acceptable solutions to the trade-offs between environmental protection and energy production. Waste heat management is an integral aspect of almost all energy conversion facilities including steam-electric power stations, liquified natural gas facilities and coal gasification plants. The problem is of particular concern for present day multi-unit generating stations and in the planning of future facilities such as "power parks". Three important aspects of waste heat management are 1) the effect on energy conversion efficiency, 2) the effect of waste heat on the environment, and 3) the control and possible utilization of waste heat emissions. The conversion efficiency of steam-electric power stations expresses the fraction of the chemical or nuclear energy of the primary fuel which is 4

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WASTE HEAT MANAGEMENT IN THE ELECTRIC POWER INDUSTRY

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