Análisis numérico de los mapas de patrones de flujo del refrigerante R600a en un colector/evaporador de una bomba de calor asistida por energía solar

Translated title of the contribution: Numerical analysis of flow pattern map of R600a in a collector/evaporator of a solar-assisted heat pump

William Quitiaquez, Eduardo Cortez, Karen Anchapaxi, C. A. Isaza-Roldán, César Nieto-Londoño, Patricio Quitiaquez, Fernando Toapanta-Ramos

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This research work presents a detailed description of the flow patterns maps generated in a horizontal pipe of the collector/evaporator of a direct-expansion solar-assisted heat pump, using R600a refrigerant as working fluid. The study was performed in a pipe with an internal diameter of 3.8 mm and a length of 1000 mm, mass velocities varying between 197.59 and 267.26 kg·m-2·s-1 and heat flux between 72.83 and 488.27 W·m-2; during the experimental tests, an incident solar radiation between 0 and 652.9 W·m-2 was present. The Wojtan, Ursenbacher and Thome correlation was considered for the analysis and the model used does not require iterative calculations; moreover, it carries out a detailed analysis of the different zones present along the pipe. The predominant zones in this study are intermittent, annular and dryout, found in the five tests, however, due to the working conditions in all tests with the exception of test A, mist and stratified-wavy flow were found.
Translated title of the contributionNumerical analysis of flow pattern map of R600a in a collector/evaporator of a solar-assisted heat pump
Original languageSpanish
Pages (from-to)111-121
Number of pages11
JournalIngenius
Volume26
Issue number26
DOIs
StatePublished - 29 Jun 2021

Bibliographical note

Funding Information:
The authors thank to the Research Group in Renewable Energies and Mechanical Implementation of SMEs of the Universidad Politécnica Salesiana and to the Research Group in Energy and Thermodynamics of the Universidad Pontificia Bolivariana de Medellín.

Publisher Copyright:
© 2021, Universidad Politecnica Salesiana. All rights reserved.

Keywords

  • Flow patterns
  • Heat transfer
  • R600a
  • Two-phase flow

CACES Knowledge Areas

  • 517A Mechanics and allied metalworking occupations

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