TY - GEN
T1 - Enhancement of phase change heat transfer by using surface energy patterning techniques
AU - Leu, Tzong Shyng
AU - Lin, Hung Wen
AU - Wu, Tseng Hsin
PY - 2006
Y1 - 2006
N2 - Using phase change of working fluid to remove heat in a heat exchanger device is a high efficiency method. When superheated vapor passes over a sub-cooled substrate, water droplets nucleate and grow by coalescence with the surrounding drops. The merging droplets exhibit two-dimensional random motion somewhat like the Brownian movements of colloidal particles. If surface energy patterns are designed on the substrate surface, the random condensing droplets will nucleate and grow to a certain size and move toward the more hydrophilic side of the surface. Powered by this forces, condenser surface will not grow into film-wise condensation situation. Thus condensation speeds are faster than those of typical surfaces without any surface modification. This effect has implications for passively enhancing heat transfer in heat exchangers or heat pipes.
AB - Using phase change of working fluid to remove heat in a heat exchanger device is a high efficiency method. When superheated vapor passes over a sub-cooled substrate, water droplets nucleate and grow by coalescence with the surrounding drops. The merging droplets exhibit two-dimensional random motion somewhat like the Brownian movements of colloidal particles. If surface energy patterns are designed on the substrate surface, the random condensing droplets will nucleate and grow to a certain size and move toward the more hydrophilic side of the surface. Powered by this forces, condenser surface will not grow into film-wise condensation situation. Thus condensation speeds are faster than those of typical surfaces without any surface modification. This effect has implications for passively enhancing heat transfer in heat exchangers or heat pipes.
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U2 - 10.1109/NEMS.2006.334597
DO - 10.1109/NEMS.2006.334597
M3 - Conference contribution
AN - SCOPUS:46149085401
SN - 1424401402
SN - 9781424401406
T3 - Proceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
SP - 994
EP - 998
BT - Proceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
T2 - 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
Y2 - 18 January 2006 through 21 January 2006
ER -