Experimental investigation of flow boiling heat transfer of jet impingement on smooth and micro structured surfaces

Abstract Flow boiling heat transfer experiments using R134a were carried out for jet impingement on smooth and enhanced surfaces. The enhanced surfaces were circular micro pin fins, hydrofoil micro pin fins, and square micro pin fins. The effects of saturation pressure, heat flux, Reynolds number, pin fin geometry, pin fin array configuration, and surface aging on flow boiling heat transfer characteristics were investigated. Flow boiling experiments were carried out for two different saturation pressures, 820 kPa and 1090 kPa. Four jet exit velocities ranging from 1.1–4.05 m/s were investigated. Flow boiling jet impingement on smooth surfaces was characterized by large temperature overshoots, exhibiting boiling hysteresis. Flow boiling jet impingement on micro pin fins displayed large heat transfer coefficients. Heat transfer coefficients as high as 150,000 W/m 2  K were observed at a relatively low velocity of 2.2 m/s with the large ( D  = 125 μm) circular micro pin fins. Jet velocity, surface aging, and saturation pressure were found to have significant effects on the two-phase heat transfer characteristics. Subcooled nucleate boiling was found to be the dominant heat transfer mechanism.

[1]  Suresh V. Garimella,et al.  Heat Transfer and Flow Fields in Confined Jet Impingement , 2000 .

[2]  Cristina H. Amon,et al.  Microelectromechanical System-Based Evaporative Thermal Management of High Heat Flux Electronics , 2005 .

[3]  Sidy Ndao.  Single-phase and flow boiling heat transfer of jet impingement on smooth and enhanced micro structured surfaces , 2010 .

[4]  H. Martin.  Heat and Mass Transfer between Impinging Gas Jets and Solid Surfaces , 1977 .

[5]  Sung Jin Kim,et al.  Fluid Flow and Thermal Characteristics of a Microchannel Heat Sink Subject to an Impinging Air Jet , 2005 .

[6]  Dae-Young Lee,et al.  Comparative analysis of jet impingement and microchannel cooling for high heat flux applications , 1999 .

[7]  Srinath V. Ekkad,et al.  Jet impingement heat transfer on dimpled target surfaces , 2002 .

[8]  J. Thome,et al.  State of the Art of High Heat Flux Cooling Technologies , 2007 .

[9]  D. C. Wadsworth,et al.  Enhancement of Single-Phase Heat Transfer and Critical Heat Flux From an Ultra-High-Flux Simulated Microelectronic Heat Source to a Rectangular Impinging Jet of Dielectric Liquid , 1992 .

[10]  B. L. Button,et al.  A review of heat transfer data for single circular jet impingement , 1992 .

[11]  D. W. Zhou,et al.  Boiling hysteresis of impinging circular submerged jets with highly wetting liquids , 2004 .

[12]  D. Copeland.  Single-Phase and Boiling Cooling of Small Pin Fin Arrays by Multiple Nozzle Jet Impingement , 1996 .

[13]  Sung Jin Kim,et al.  Comparison of thermal performances of plate-fin and pin-fin heat sinks subject to an impinging flow , 2009 .

[14]  J. G. Maveety,et al.  Heat transfer from square pin-fin heat sinks using air impingement cooling , 2002 .

[15]  S. J. Kline,et al.  Describing Uncertainties in Single-Sample Experiments , 1953 .

[16]  Madhusudan K. Iyengar,et al.  Least-energy optimization of air-cooled heat sinks for sustainability-theory, geometry and material selection , 2006 .

[17]  Frank P. Incropera,et al.  Local jet impingement boiling heat transfer , 1996 .

[18]  A. Bergles,et al.  Jet impingement nucleate boiling , 1986 .

[19]  Suresh V. Garimella,et al.  Experimental optimization of confined air jet impingement on a pin fin heat sink , 1999 .

[20]  B. W. Webb,et al.  Single-Phase Liquid Jet Impingement Heat Transfer , 1995 .

[21]  D. C. Wadsworth,et al.  Critical heat flux from a simulated chip to a confined rectangular impinging jet of dielectric liquid , 1991 .

[22]  H. A. El-Sheikh,et al.  Enhancement of air jet impingement heat transfer using pin-fin heat sinks , 2000 .

[23]  Y. Peles,et al.  Heat transfer enhancement from micro pin fins subjected to an impinging jet , 2012 .

[24]  Go-Long Tsai,et al.  Thermal performance measurement of heat sinks with confined impinging jet by infrared thermography , 2005 .

[25]  S. M. You,et al.  Effect of Pressure, Subcooling, and Dissolved Gas on Pool Boiling Heat Transfer From Microporous Surfaces in FC-72 , 2003 .

[26]  W. Nakayama,et al.  Optimization of Finned Heat Sinks for Impingement Cooling of Electronic Packages , 1998 .