Power Plant Diffuser-Pipe System

by A. David Parr, (A.M.ASCE), Asst. Prof.; Dept. of Civ. Engrg., Auburn Univ., Auburn, Ala.,
William W. Sayre, (M.ASCE), Prof.; Energy Engrg., and Research Engr., Inst. of Hydr. Research, Univ. of Iowa, Iowa City, Iowa,

Serial Information: Journal of the Environmental Engineering Division, 1979, Vol. 105, Issue 6, Pg. 1075-1093

Document Type: Journal Paper


Results are presented for a comprehensive model and prototype experimental study of a submerged multiport diffuser discharging heated water from a steam-electric generating station into the Mississippi River. The principal objectives of the study relate to predicting thermal mixing zones. Temperature and velocity distributions are studied in the region just downstream from individual ports in both model and prototype and at a cross section about one-fourth of the local river width downstream from the diffuser in the prototype. The river flow below which the applicable thermal standards would be violated is predicted. Comparisons show that the performance of the prototype multiport diffuser ports can be represented satisfactorily by a sectional laboratory flume model.

Subject Headings: Power plants | Rivers and streams | Hydrologic models | Diffusion (thermal) | Structural models | Water discharge | Thermal effects | Temperature distribution | Mississippi River

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