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Previous issue date: 2017-07-28 / O presente trabalho tem como objetivo avaliar o desempenho de um sistema de
refrigera??o por compress?o de vapor utilizando diferentes fluidos refrigerantes sint?ticos.
Depois do sucesso na aplica??o do Protocolo de Montreal, que culminou na elimina??o dos
CFCs (clorofluorcarbonetos) que tinha alto potencial de destrui??o da camada de oz?nio, nos
?ltimos anos foi constatado que os HCFCs que surgiram com excelente alternativa aos CFCs
tamb?m prejudicam o meio ambiente, sua libera??o para atmosfera contribui para o efeito estufa
causando o aquecimento global. Por isso o governo brasileiro elaborou um Programa de
Elimina??o dos HCFCs (hidroclorofluorcarbonos), este programa est? voltado principalmente
para elimina??o do consumo do HCFC-22 (R22), que ? um dos fluidos refrigerantes mais
utilizado nos sistemas de refrigera??o e ar condicionado. Neste contexto, o presente trabalho
pretende fazer estudo termodin?mico comparativo entre dois fluidos refrigerantes sint?ticos o
R-22 e o R437a. O refrigerador funcionando com R437 foi submetido a testes abaixamento de
temperatura conforme norma ABNT para diferentes cargas t?rmicas no evaporador. Os
resultados obtidos foram comparados com o refrigerador funcionando com R22 para as mesmas
cargas t?rmicas e revelam que a performance do refrigerador com o R22 ? superior ao R437a. / The objective of this work is to evaluate the performance of a steam compression
refrigeration system using different synthetic refrigerant fluids. Following the successful
implementation of the Montreal Protocol, which culminated in the elimination of CFCs
(chlorofluorocarbons) which had a high potential for destruction of the ozone layer, it has been
found in recent years that the HCFCs that have emerged as an excellent alternative to CFCs
also harm the environment , its release into the atmosphere contributes to the greenhouse effect
causing global warming. For this reason, the Brazilian government has developed a Program
for the Elimination of HCFCs (hydrochlorofluorocarbons). This program is mainly aimed at
eliminating the consumption of HCFC-22 (R22), which is one of the refrigerants used in
refrigeration and air conditioning systems. In this context, the present work intends to make a
comparative thermodynamic study between two synthetic refrigerant fluids R-22 and R437a.
The refrigerator running on R437 was subjected to temperature lowering tests according to
ABNT standard for different thermal loads on the evaporator. The results obtained were
compared with the refrigerator running on R22 for the same thermal loads and show that the
performance of the refrigerator with R22 is higher than R437a.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24555 |
| Date | 28 July 2017 |
| Creators | Miranda, Silas Ferreira Tavares Martins |
| Contributors | 22174443449, Neves, Elierton Evangelista das, 76127982472, Fontes, Lucio ?ngelo de Oliveira, 09443703491, Fontes, Francisco de Assis Oliveira, Barbosa, Cleiton Rubens Formiga |
| Publisher | 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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