The Periodic Flow Cooling Tower: A Design Analysis

摘要

The rate equations describing heat transfer, mass transfer, and energy transfer by combined heat and mass transfer are developed for the special case of unity lewis number. These equations are then combined with energy and mass conservation equations in developing an analysis of the performance of indirect transfer, periodic-flow, counter-flow energy exchangers suitable for use as water cooling units. Compared to the steady-flow, direct transfer exchanger, the periodic flow units have higher effectiveness per unit volume of exchanger core but require larger frontal areas and shorter flow lengths for the same inlet states, flow rates, and installed fan-horsepower. (Author)