Stationary processes of heat and moisture transfer at condensation cooling of gases by liquid phase on plates of various designs in scrubber-coolers are considered. The process efficiencies, heat balance equations and the number of transfer units in the gas phase are written down. To calculate the thermal efficiency of gas cooling, the known expressions from the theory of mass transfer taking into account the hydrodynamic structure of flows, as well as the criterion expression for the Sherwood number are used. Examples of calculations and graphical dependences of thermal efficiency on gas velocity for failure, valve, jet and other plates at air cooling with water are given. A one-dimensional differential equation of heat transfer is presented, the solution of which makes it possible to take into account the inhomogeneity of the gas phase velocity profile and the liquid level gradient along the length of the plate and to calculate efficiency of the process. Calculated dependences of the temperature field and thermal efficiency on sieve and valve plates are given. It is shown that the non-uniform gas velocity profile caused by the liquid level gradient reduces the thermal efficiency.
Laptev et al. (Wed,) studied this question.