A Thermal Fluid-Mechanical Model for Estimation of Power Plant Inpact on a Stratified Lake.

摘要

The natural thermal cycle of a stratified water body used for power-plant cooling will be disturbed both by heat addition and the mixing effect of withdrawal and return. A perturbation analysis for these effects is made with a model based on the assumption that a Richardson number is constant at the base of any stratified layer. On a further assumption about the profiles of wind-driven return currents,constant heat flux from the layer is inferred. This heat flux,and the diffusion coefficient at the thermocline,are the critical parameters of the simple,one-dimensional,line-segment model,and are chosen to give good imitation of the known natural cycle of Cayuga Lake. The model is then perturbed in terms of both heat flux and diffusion of give power-plant impact for that lake. Both transient and final cycle changes of summer and winter temperatures and stratification and overturn are calculated. (Author Modified Abstract)