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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Second, the cooling tower design must reflect a balance between the capital cost of tower construction and the loss of net plant capacity during tower operation. Third, the location, operation, and interpre- tation of the temperature monitoring system will be major factors in determining the frequency of cooling tower usage. Of particular impor- tance in this regard is the influence of natural temperature variations which may mask the true impact of plant operations. Finally, the specifi- cation of the environmental temperature standard itself will directly affect the percentage of time cooling tower use is requried. The design and operational issues detailed above have been examined in the context of a case study involving TVA's Browns Ferry Nuclear Plant. The large quantity of available site-specific data reflecting both pre-operational and post-operational conditions has made possible realistic simulations of plant operation and investigation of the sensitivity of plant capacity losses to design and operational parameters. Figure 2-7 shows such a simulation. The most important findings of the study are: (1) The capability to switch cooling modes results in only 10% of the capacity losses experienced by a totally closed system. (2) The cooling tower related capacity loss is extremely sensitive to the specified limit on induced temperature increases. A decrease in the allowable temperature rise from 5F to 3F produced a 300% increase in lost capacity. 48

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