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 language | English |
|---|---|
| Pages (from-to) | 113-120 |
| Number of pages | 8 |
| Journal | Transactions of the Korean Society of Mechanical Engineers, B |
| Volume | 34 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2010 Feb |
Keywords
- Diffusion bonding
- Evaporative heat transfer coefficient
- Micro-channel
- Printed circuit heat exchanger
ASJC Scopus subject areas
- Mechanical Engineering