Câmara fria para conservação de rosas – estudo de viabilidade retrofit arcondicionado e visa cooler
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Arquivos
Data
2023-07-16
Tipo de documento
Monografia
Título da Revista
ISSN da Revista
Título de Volume
Área do conhecimento
Engenharias
Modalidade de acesso
Acesso aberto
Editora
Autores
Oliveira, Dener Guimarães de
Orientador
Bartex, Sergio Luiz Telles
Coorientador
Resumo
O comercio de flores ornamentais é um dos setores que vem crescendo, e fomentando a economia. Através dele muitas famílias provem o seu sustento, investindo no varejo de flores. Uma das principais ferramentas para a atividade, é possuir um equipamento que armazene e refrigere as flores. Os equipamentos usuais possuem um valor de investimento inicial alto. Assim, esse trabalho visa desenvolver um protótipo de câmara fria de baixo custo, para aumentar a vida útil das flores, diminuindo perdas e auxiliando aos comerciantes em fase inicial. Para atingir o esse objetivo propôs-se realizar o retrofitting de equipamentos encontrados em centros de reciclagem. Para desenvolver o trabalho utilizou-se um software para calcular a carga térmica e dimensionar o equipamento. Foi realizado um projeto assistido por computador para modelar o protótipo. Desenvolveu-se também a parte elétrica do equipamento realizando a substituição dos controladores originais por um sistema capaz de ser programado conforme a necessidade. Para avaliar a bancada utilizou-se dois testes: um com o equipamento vazio para ver a temperatura que o protótipo conseguiria atingir, e outro avaliando a efetividade do equipamento em manter as propriedades das flores. Em ambos os testes ele mostrou um excelente desempenho, ao atingir a temperatura de 0°C, e conservar as qualidades das rosas por sete dias. Durante os testes foram feitas comparações entre amostras que estavam refrigeradas e outras expostas as condições ambientes. Neste teste o equipamento mostrou um retardo significativo da senescência das flores. O trabalho mostra que é possível construir o equipamento, e suprir as necessidades de pequenos comerciantes, com um investimento relativamente baixo.
The trade in ornamental flowers is one of the sectors that has been growing and boosting the economy. Through it, many families provide their livelihood, investing in flower retail, this niche requires, in addition to technical and artistic knowledge, an initial contribution. One of the main tools for the activity is to have equipment that stores and cools the flowers. The usual equipment has a high initial investment value. Thus, this work aims to develop a prototype of a low-cost cold room, to increase the useful life of flowers, reducing losses and helping traders in the initial phase. To achieve our objective, we propose retrofitting equipment found in recycling centers, where they are found in the form of obsolete equipment, or incapable of carrying out storage with high sanitary requirements. To develop the work, we used software to calculate the thermal load and dimension the equipment, with the help of a computer-assisted design system to model the prototype. We also developed the electrical part of the equipment by replacing the original controllers with a system capable of being programmed as needed. To evaluate the bench, two tests were used, one with the equipment empty to see the temperature that the prototype could reach, and another evaluating the effectiveness of the equipment in maintaining the properties of the flowers. In both tests it showed excellent performance, reaching a temperature of 0°C and preserving the qualities of roses for seven days. During the tests, comparisons were made between samples that were refrigerated and others exposed to ambient conditions. In this test, the equipment showed a significant delay in flower senescence. The work shows that it is possible to build the equipment, and meet the needs of small traders, with a relatively low investment.
The trade in ornamental flowers is one of the sectors that has been growing and boosting the economy. Through it, many families provide their livelihood, investing in flower retail, this niche requires, in addition to technical and artistic knowledge, an initial contribution. One of the main tools for the activity is to have equipment that stores and cools the flowers. The usual equipment has a high initial investment value. Thus, this work aims to develop a prototype of a low-cost cold room, to increase the useful life of flowers, reducing losses and helping traders in the initial phase. To achieve our objective, we propose retrofitting equipment found in recycling centers, where they are found in the form of obsolete equipment, or incapable of carrying out storage with high sanitary requirements. To develop the work, we used software to calculate the thermal load and dimension the equipment, with the help of a computer-assisted design system to model the prototype. We also developed the electrical part of the equipment by replacing the original controllers with a system capable of being programmed as needed. To evaluate the bench, two tests were used, one with the equipment empty to see the temperature that the prototype could reach, and another evaluating the effectiveness of the equipment in maintaining the properties of the flowers. In both tests it showed excellent performance, reaching a temperature of 0°C and preserving the qualities of roses for seven days. During the tests, comparisons were made between samples that were refrigerated and others exposed to ambient conditions. In this test, the equipment showed a significant delay in flower senescence. The work shows that it is possible to build the equipment, and meet the needs of small traders, with a relatively low investment.
Palavras-chave
Refrigeração de rosas, Controlador digital, Ar-condicionado, Reaproveitamento, Retrofitting, Carga térmica