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

Autor(es)

Narvaez-Romo, Beethoven ; Simoes-Moreira, Jose R.

• Tipo de documento: Artigo Científico
• Fonte: 25TH IIR INTERNATIONAL CONGRESS OF REFRIGERATION, ICR 2019; v. N/A, p. 8-pg., 2019-01-01.

Resumo

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. (AU)

• Processo FAPESP: 16/09509-1 - Processos de transferência de calor com mudança de fase de elevado desempenho aplicados ao aproveitamento de energia solar
• Beneficiário: Gherhardt Ribatski
• Modalidade de apoio: Auxílio à Pesquisa - Temático