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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Flow boiling heat transfer of R134a and low GWP refrigerants in a horizontal micro-scale channel

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Autor(es):
Sempertegui-Tapia, Daniel Felipe ; Ribatski, Gherhardt
Número total de Autores: 2
Tipo de documento: Artigo Científico
Fonte: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER; v. 108, n. B, p. 2417-2432, MAY 2017.
Citações Web of Science: 15
Resumo

The present paper presents an investigation of the effects of the refrigerant type on the heat transfer coefficient during flow boiling inside micro-scale channels. Experimental results for R134a, R1234ze(E), R1234yf and R600a for flow boiling in a circular channel with internal diameter of 1.1 mm are presented. The experimental database comprises 3409 data points covering mass velocities ranging from 200 to 800 kg/m(2) s, heat fluxes from 15 to 145 kW/m(2), saturation temperatures of 31 and 41 degrees C, and vapor qualities from 0.05 to 0.95. The experimental data were parametrically analysed and the effects of the experimental parameters (heat flux, mass velocity, saturation temperature and working fluid) identified. Subsequently, the experimental data were compared against the most quoted predictive methods from literature, including macro and micro-scale methods. Based on the broad database obtained in the present study, an updated version of the predictive method of Kanizawa et al. (2016) was proposed. The updated version provided accurate predictions of the present experimental database, predicting more than 97% and 86% of the results within error bands of 30 and 20%, respectively. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 10/17605-4 - Análise experimental do efeito da geometria do micro canal no padrão de escoamento, coeficiente de transferência de calor e perda de pressão durante a ebulição convectiva
Beneficiário:Daniel Felipe Sempértegui Tapia
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 11/50176-2 - Mitigação da emissão de gases de efeito estufa em sistemas de refrigeração mediante a utilização de gases com baixo GWP e a aplicação de micro e nanotecnologias
Beneficiário:Gherhardt Ribatski
Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular