An experimental study on the evaporative heat transfer characteristics of R-134a in a micro-channel heat exchanger

Haeseung Lee, Dong Soon Jeon, Young Lyoul Kim, Yongchan Kim, Seon Chang Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

An experimental investigation was carried out to examine the evaporative heat transfer characteristics of R-134a in a micro-channel heat exchanger. The micro-channel heat exchanger used in this study was a sort of plate heat exchanger. Micro-channels were fabricated on the SUS304 plate by the photo-etching process: 13 sheets of plates were stacked and bonded by the diffusion bonding process. The effects of the evaporating temperature, mass flux of R-134a, and inlet temperature of water were examined. As the difference between the inlet temperatures of R-134a and water increased, the heat transfer rate increased. The evaporative heat transfer coefficients obtained in this study range from 0.67 to 6.23 kW/m2-°C. The experimental correlation for the Nusselt number as a function of the Reynold number and θ was suggested for the micro-channel heat exchanger.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalTransactions of the Korean Society of Mechanical Engineers, B
Volume34
Issue number2
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Diffusion bonding
  • Evaporative heat transfer coefficient
  • Micro-channel
  • Printed circuit heat exchanger

ASJC Scopus subject areas

  • Mechanical Engineering

Fingerprint Dive into the research topics of 'An experimental study on the evaporative heat transfer characteristics of R-134a in a micro-channel heat exchanger'. Together they form a unique fingerprint.

  • Cite this