TITLE

Biologically inspired porous cooling membrane using arrayed-droplets evaporation

AUTHOR(S)
Kokalj, T.; Cho, H.; Jenko, M.; Lee, L. P.
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/19/2010, Vol. 96 Issue 16, p163703
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Inspired by human skin that dissipates heat via sweat-droplet evaporation on the skin, we propose an evaporative cooling technique via arrayed-droplets on a porous membrane, construct an analytical model of the evaporative cooling including interactions among the large number of droplets, and extensively analyze the cooling performance of 1000-droplet array. Our model shows that heat dissipation is enhanced by the membrane with dense droplets (i.e., enhancement factor of 10 at 5000 pores/cm2 and pore radius of 35 μm with respect to human skin). Additionally, the model predicts that the membrane dissipates heat more efficiently by operating at a higher temperature (i.e., additional enhancement factor of 17 at droplet temperature of 100 °C).
ACCESSION #
49807511

 

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