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Previous issue date: 2015-06-19 / A redu??o no consumo de energia ? o principal requisito a ser satisfeito em sistemas de
refrigera??o e condicionamento de ar por compress?o mec?nica de vapor. Em sistemas
automotivos essa realidade n?o ? diferente. A an?lise t?rmica nesses sistemas ? de
fundamental import?ncia para um bom desempenho do ar-condicionado veicular. Este
trabalho tem o objetivo de avaliar as condi??es de utiliza??o do g?s refrigerante R134a
(utilizado em ve?culos automotivos), variando a velocidade no eletroventilador do
evaporador, comparando a performance do mesmo com o g?s R437a, submetido as
mesmas condi??es. Todos os testes foram realizados na unidade de climatiza??o
automotiva ATR600, que simula as condi??es t?rmicas do sistema e do habit?culo do
ve?culo. O equipamento est? instrumentado para aquisi??o dos dados de temperatura,
press?es de alta e baixa e pot?ncia el?trica consumida, para determina??o do coeficiente
de performance do ciclo. O sistema foi ensaiado nas rota??es de 800, 1600 e 2400 RPM
com carga constante de R134a / R437a, recomendada pelo fabricante. Os resultados
mostram que a melhor performance do sistema ocorre na rota??o de 800 RPM para
ambos os refrigerantes. / The reduction in energy consumption is the main requirement to be satisfied in
refrigeration and air conditioning by mechanical vapor compression system. In
automotive system isn?t different. Thermal analyses in these systems are crucial for a
better performance in automotive air conditioner. This work aims to evaluate the
conditions of use of R134A refrigerant (used in vehicles) and compare with R437A
(alternative refrigerant), varying the speed of the electric fan in the evaporator. All tests
were performed in automotive air conditioning unit ATR600, simulating the thermal
conditions of the system. The equipment is instrumented for data acquisition
temperature, condensation and evaporation pressures and electrical power consumed to
determine the coefficient of performance of the cycle. The system was tested under
rotations of 800, 1600 and 2400 rpm with constant load of R- 134a. It occurred with the
same conditions with R437A. Both recommended by the manufacturer. The results
show that the best system performance occurs in the rotation of 800 RPM for both
refrigerants.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20600 |
| Date | 19 June 2015 |
| Creators | Nascimento, Bruno Daniel Alves do |
| Contributors | 22174443449, http://lattes.cnpq.br/8673332414572221, Fontes, L?cio ?ngelo de Oliveira, 09443703491, http://lattes.cnpq.br/6626062514308083, Souza J?nior, Caubi Ferreira de, 40378632434, http://lattes.cnpq.br/5346630547885521, Fontes, Francisco de Assis Oliveira, Barbosa, Cleiton Rubens Formiga |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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