Dimensionamento da área de troca térmica entre os fluidos vinho e refrigerante propilenoglicol utilizando um trocador de calor duplo turbo

Abstract

Tartaric stabilization is a chemical process used in wine production to prevent the formation of undesirable precipitates. The aim of this work is to carry out a case study to size the heat exchange area of a double tube heat exchanger in the winemaking process. This study was carried out in a winery located in the hills of Rio Grande do Sul, in the city of Bento Gonçalves. An energy balance between the fluids is used to obtain the volumetric flow rate of the propylene glycol fluid and, with the heat transfer rate, the heat exchange area and the length of the double tube heat exchanger will be obtained. Pressure loss equations will be used to select pumps for fluid flow. The work shows that the volumetric flow rate required for the process is 44.13 m³/h for the propylene glycol fluid. The heat exchange area of the double tube heat exchanger is 18.19m². The pressure loss in the inner tube of the heat exchanger is 0,012 MPa and the total pressure loss of the wine fluid system is 0,172 MPa. In the annular region of the heat exchanger it is 0,331 MPa and in the propylene glycol fluid system it is 0,405 MPa. The proposed objectives of the work were fully achieved, so the total investment required to complete the case study is R$147,402.00 (one hundred and forty-seven thousand four hundred and two reais). [resumo fornecido pelo autor]