Investigations of Transfer Processes in Nonadiabatic Absorption Process

摘要

The increasing tendency to use unified compact apparatus for multiphase flow regime gaseous-liquid is connected with the aim to reach a higher efficienty. For example, a considerable reduction of required space is possible by using plate apparatus for all essential heat transmission units in the sorption cycle preocesses. The achieved state of the description of hydrodynamics as well as of the coupled heat and mass transfer in narrow rectangular channels with profiled plates is inadequate and above all referred to problems of the condensation and above all referred to problems of the condensation and of vaporization [1,2]. Experimental state-ments and calculation proposals hardly exist for the process of nonadiabatic absorption [3]. Own comparative integral investigations for the heat transfer characteristics during absorption with heat removal reveal advantages of the two-phase regime for bubble/plug flow in the profiled rectangular channels compared to the falling-film flow on tube surfaces [4]. Threfore, systematical experiments were carried out for absorption of ammonia-vapor in aqueous NH_3 solution.