EVAPORATION OF A CIRCULAR MENISCUS OF NH(3) FLOWING PARALLEL TO A GASEOUS NH(3)-H(2) STREAM

A solution is presented for the three-dimensional heat and mass transf er during evaporation of a circular meniscus of liquid NH3, flowing pa rallel to a gaseous NH3-H-2 stream, as encountered in the evaporator o f small neutral gas absorption refrigerators. The procedure developed is based on a finite difference solution of a set of differential equa tions expressing the three-dimensional transport of momentum, heat, an d mass. Expressions are also provided for the thermodynamic and transp ort properties of the real NH3-H-2 mixture. The results of the numeric al solution include the fields of velocity, temperature, NH3 mass frac tion, enthalpy, and entropy.