TY - JOUR
T1 - Experimental investigation on heat transfer and pressure drop characteristics of confined jet impingement boiling on hybrid-structured surface
AU - Huang, Yanpei
AU - Miao, Jianyin
AU - Niu, Zitian
AU - Zhao, Jingquan
AU - Wu, Qi
AU - Fu, Zhendong
AU - Yang, Qi
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/1/5
Y1 - 2023/1/5
N2 - In this study, confined jet impingement boiling experiments are carried out using ammonia for the heat dissipation of high-heat-flux hotspot. A hybrid-structured surface with triangular prism-convex structure in the stagnation zone and microchannel structure in the wall jet zone is designed for heat transfer enhancement. Utilizing the advantages of jet impingement and microchannel flow boiling, the temperature of the heating surface is maintained below 86.5 °C when subjected to a hotspot heat flux of 1367 W/cm2, verifying the promising cooling performance of jet boiling on hybrid-structured surface. Effects of jet velocity (0.34–7.07 m/s), heat flux (752, 1064, and 1367 W/cm2), saturation temperature (22, 26, and 30 °C), and inlet condition (subcooled, near-saturated, and two-phase state) are also investigated. Increasing jet velocity and saturation temperature are beneficial to the heat transfer of jet boiling in the central stagnation zone. For high jet velocity flow (V > 2.3 m/s), the junction-to-fluid thermal resistance is the lowest at heat flux of 753 W/cm2; while for low jet velocity flow (V < 2.3 m/s), the best cooling performance is obtained at heat flux of 1367 W/cm2. The pressure drop increases with jet velocity and inlet vapor quality, and shows no significant dependence on heat flux and saturation temperature.
AB - In this study, confined jet impingement boiling experiments are carried out using ammonia for the heat dissipation of high-heat-flux hotspot. A hybrid-structured surface with triangular prism-convex structure in the stagnation zone and microchannel structure in the wall jet zone is designed for heat transfer enhancement. Utilizing the advantages of jet impingement and microchannel flow boiling, the temperature of the heating surface is maintained below 86.5 °C when subjected to a hotspot heat flux of 1367 W/cm2, verifying the promising cooling performance of jet boiling on hybrid-structured surface. Effects of jet velocity (0.34–7.07 m/s), heat flux (752, 1064, and 1367 W/cm2), saturation temperature (22, 26, and 30 °C), and inlet condition (subcooled, near-saturated, and two-phase state) are also investigated. Increasing jet velocity and saturation temperature are beneficial to the heat transfer of jet boiling in the central stagnation zone. For high jet velocity flow (V > 2.3 m/s), the junction-to-fluid thermal resistance is the lowest at heat flux of 753 W/cm2; while for low jet velocity flow (V < 2.3 m/s), the best cooling performance is obtained at heat flux of 1367 W/cm2. The pressure drop increases with jet velocity and inlet vapor quality, and shows no significant dependence on heat flux and saturation temperature.
KW - Heat dissipation
KW - Heat transfer enhancement
KW - Hotspot
KW - Jet impingement boiling
KW - Microchannel flow boiling
UR - https://www.scopus.com/pages/publications/85138545019
U2 - 10.1016/j.applthermaleng.2022.119320
DO - 10.1016/j.applthermaleng.2022.119320
M3 - 文章
AN - SCOPUS:85138545019
SN - 1359-4311
VL - 218
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 119320
ER -