EXPERIMENTAL ANALYSIS OF PRESSURE DROP IN SINGLE AND TWO PHASE IN MINI CHANNELS

Autores

  • J. D. Oliveira Universidade Federal de Santa Catarina
  • J. B. Copetti Universidade Federal de Santa Catarina
  • I. C. Dias Universidade do Vale do Rio dos Sinos
  • M. H. Macagnan Universidade do Vale do Rio dos Sinos

DOI:

https://doi.org/10.5380/reterm.v13i1.62071

Palavras-chave:

pressure drop, natural refrigerant, single phase, boiling, mini channel

Resumo

Evaporators with mini and micro channels are one of the main focuses in the design and development of equipment applied to compact refrigeration systems. The objective of this work is to investigate pressure drop of natural refrigerant, isobutane (R-600a), in the single-phase flow through two small tubes, with 1.0 mm and 2.6 mm of internal diameter. Also, the pressure drop was analyzed in the boiling flow in a 2.6 mm internal diameter tube. The experimental tests included mass velocities of 188, 240, 280 and 370 kg/(m²s), heat fluxes in the range from 0 to 134 kW/m² and boiling flow the saturation temperature of 22 ºC and vapor quality up to 0.8. It was possible to observe the significant influence of the diameter and mass velocity on the total pressure drop and the frictional pressure drop, respectively. The experimental frictional pressure drop in flow boiling in 2.6 mm of internal diameter was compared with four different correlations in literature.

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Publicado

2014-06-30

Como Citar

Oliveira, J. D., Copetti, J. B., Dias, I. C., & Macagnan, M. H. (2014). EXPERIMENTAL ANALYSIS OF PRESSURE DROP IN SINGLE AND TWO PHASE IN MINI CHANNELS. Revista Da Engenharia Térmica, 13(1), 59–64. https://doi.org/10.5380/reterm.v13i1.62071

Edição

v. 13 n. 1 (2014)

Seção

Science

Licença

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