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Advisor(s)
Abstract(s)
Este Trabalho Final de Mestrado consiste na concepção de uma instalação frigorífica com atmosfera controlada com o objectivo de armazenar uvas de mesa.
Em primeiro lugar estudou-se os factores que influenciam na concepção da instalação, quer a nível interno e externo. Também foi feito um estudo do produto, como o seu processo de amadurecimento, a sua respiração, e produção de etileno, factores fundamentais em atmosfera controlada.
De seguida foi dimensionada a instalação, com atenção ao seu revestimento térmico e foram desenhados os esquemas de princípio simples.
Foi feito o balanço térmico da instalação, assim como todos os cálculos que permitiram a selecção dos equipamentos das câmaras, do tanque de pré-arrefecimento, e da atmosfera controlada.
Por fim fez-se uma análise dos custos que uma atmosfera controlada tem, assim como o seu benefício em prolongar o estado são de produto, comparado ao que este duraria em atmosfera controlada.
Abstract: This final master’s degree project consists on the design of a refrigeration facility on a controlled atmosphere, for storage of grapes for consumption. First, it was studied the main factors that influence in the same design, internally or externally. It was studied the product as well, such as its maturation, breathing process, and ethylene production, crucial factors to the controlled atmosphere. It was then dimensioned the facility, with special caution to its coating, and was drawn plain layout schemes. Also, it was made the thermal balance of the facility, as well as all calculations to allow choosing all equipment related to the refrigeration chamber, the pre-cooling tank and the controlled atmosphere. Finally, it was made an analysis on the costs of the controlled atmosphere, as well as its benefit of extend the consumption durability of the product, compared to what it would last in a normal atmosphere.
Abstract: This final master’s degree project consists on the design of a refrigeration facility on a controlled atmosphere, for storage of grapes for consumption. First, it was studied the main factors that influence in the same design, internally or externally. It was studied the product as well, such as its maturation, breathing process, and ethylene production, crucial factors to the controlled atmosphere. It was then dimensioned the facility, with special caution to its coating, and was drawn plain layout schemes. Also, it was made the thermal balance of the facility, as well as all calculations to allow choosing all equipment related to the refrigeration chamber, the pre-cooling tank and the controlled atmosphere. Finally, it was made an analysis on the costs of the controlled atmosphere, as well as its benefit of extend the consumption durability of the product, compared to what it would last in a normal atmosphere.
Description
Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Mecânica
Keywords
Atmosfera controlada Controlled atmosphere R134a Uva de mesa Consumption grape Instalação frigorífica Refrigeration facility Produto refrigerado Refrigerated product
Citation
BEITES, Rui Pedro Leitão - Concepção de uma instalação frigorifíca com atmosfera controlada para a conservação de uvas de mesa. Lisboa: Instituto Superior de Engenharia de Lisboa, 2013. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa