Absorption and Adsorption Thermodynamic Processes (1)

Monday August 26, 2019 from 15:30 to 17:10

Room: 518ab

TS-119 .3 Numerical study of heat and mass transfer absorption processes using a horizontal flooded-liquid film in ammonia-water mixtures

Beethoven Narváez-Romo, Brazil

PhD Candidate
Mechanical Eng. Dept.
University of Sao Paulo

Abstract

Numerical study of heat and mass transfer absorption processes using a horizontal flooded-liquid film in ammonia-water mixtures

Beethoven Narváez-Romo1, José R. Simões-Moreira1.

1University of Sao Paulo, Sao Paulo, Brazil

This paper presents a numerical study of the heat and mass transfer (HMT) absorption process using ammonia-water solution in a new configuration of horizontal flooded-liquid film, in which the total surface wettability is reached.

The absorber is composed of several plates placed in the vertical position. Each one of these plates have a spiral cooling tube, in which the coolant flows and the liquid solution flows over and around the tube. The plate depth guarantees a one-millimeter liquid film of the ammonia-water solution.

A mathematical model based on the overall balance of mass, ammonia species, and energy equations was carried out. These equations were solved for a set of control volumes discretized by the finite-difference method, and with the HMT correlations.

A parametric study of the absorption process was performed: surface temperature, plates number, and liquid film thickness.

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