Análise do desempenho energético e exegético de acordo com a temperatura de evaporação de um chiller de compressão de vapor

Authors

DOI:

https://doi.org/10.47456/bjpe.v10i3.44651

Keywords:

Chiller de compressão de parafuso, Eficiência energética, Eficiência exergética, Temperatura de evaporação

Abstract

Este artigo apresenta uma análise de eficiência energética e exergética de um sistema de refrigeração de água gelada de grande porte, um chiller, integrado a uma central de água gelada projetada para suprir a carga térmica necessária para a refrigeração do ar de um grande shopping localizado na capital do estado da Paraíba, Brasil. O chiller estudado utiliza um compressor do tipo parafuso, que opera com um motor elétrico para aumentar a pressão em uma fase do ciclo termodinâmico, resultando em um consumo significativo de energia, especialmente em operações contínuas e sob carga elevada. O estudo se concentra na redução do consumo de energia elétrica ao avaliar e identificar melhorias na operação do sistema, com base no comportamento energético e exergético. Para alcançar esse objetivo, foram realizadas simulações numéricas utilizando o software Engineering Equation Solver (EES), que permitiram representar e otimizar o funcionamento do sistema.  Além disso, o artigo apresenta dados detalhados do ciclo de refrigeração do chiller em estudo, essenciais para compreender o funcionamento do equipamento. Os resultados indicam que o evaporador teve a maior perda de exergia, porém  reduzível ao aumentar a temperatura de evaporação, melhorando a eficiência global da unidade de refrigeração e reduzindo o consumo de energia elétrica.

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Author Biographies

Carlos Eduardo da Silva Albuquerque, Universidade Federal do Vale do São Francisco, Colegiado de Engenharia de produção, Campus Salgueiro-PE

PhD in Materials Science and Engineering, a master's degree in Mechanical Engineering, and a bachelor's degree in Mechanical Engineering, all from the Federal University of Campina Grande. His research focuses on metallurgical processes, with an emphasis on rapid precision casting and thermophysical processes using numerical simulation. He has also conducted previous research on energy and exergy analysis for process improvement and multiphase fluid flow. In academia, he works as a tenured professor in the Production Engineering program at the Federal University of Vale do São Francisco, where he is responsible for teaching courses in the field of mechanics.

Celso Rosendo Bezerra Filho, Universidade Federal de Campina Grande

Holds a bachelor's degree in Mechanical Engineering from the Federal University of Paraíba (1985), a master's degree in Mechanical Engineering from the Federal University of Paraíba (1988), and a PhD in Thermal Engineering from the National Institute of Applied Sciences of Lyon (1998). Currently, he is a full professor at the Federal University of Campina Grande. He has experience in the field of Mechanical Engineering, with an emphasis on Heat Transfer and Thermodynamics, mainly focusing on the following topics: periodic regime, heat transfer, thermal diffusivity, contact resistance, and thermodynamic analysis of internal combustion engines.

 

Thays Nogueira Rodrigues, Centro Universitário Paraíso, Departamento de Engenharia Civil

PhD candidate in Civil and Environmental Engineering at the Federal University of Campina Grande, with a research focus on Pavement Mechanics and Management. Holds a master's degree in Civil and Environmental Engineering from the Federal University of Campina Grande, with a concentration in Geotechnics (2017). Graduated in Civil Engineering from the Federal University of Campina Grande (2015). Currently works as a professor at the Paraíso University Center (UniFAP) in the Civil Engineering and Architecture and Urbanism programs, developing research and supervising projects related to the Transportation Project Evaluation research line.

Maria Deise Calou Leite, Centro Universitário Paraíso, Departamento de Engenharia Civil

Undergraduate student in Civil Engineering at the Paraíso University Center (UNIFAP). FIES scholarship holder. Conducts research on pavement under the guidance of Professor Thays Nogueira Rodrigues.

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Published

2024-08-08

How to Cite

Albuquerque, C. E. da S., Bezerra Filho, C. R., Rodrigues, T. N., & Leite, M. D. C. (2024). Análise do desempenho energético e exegético de acordo com a temperatura de evaporação de um chiller de compressão de vapor. Brazilian Journal of Production Engineering, 10(3), 256–272. https://doi.org/10.47456/bjpe.v10i3.44651

Issue

Vol. 10 No. 3 (2024): Regular Issue (July - September)

Section

ENERGY

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