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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

HYSICAL PROPERTIES CHANGE AND HEAT TRANSFER ENHANCEMENT IN COMPACT-CHAMBER SPRAY COOLING USING HIGH-ALCOHOL SURFACTANT

Get access (open in a dialog) DOI: 10.1615/IHTC16.hte.022483
pages 5207-5221

Abstract

Recent developments in electronic device have heightened the need for the improving of cooling capacity. The addition of surfactant is considered as an important method of heat transfer enhancement in spray cooling based on numerous advantages such as less demand, obviously enhancement and stable performance. A loop spray cooling system with compact chamber was designed and heat transfer enhancement experiment was studied. Four high-alcohol surfactants, 1-heptanol, 1-octanol, isooctanol and n-decanol, were added in water. In order to deeply understand enhanced mechanism, the physical properties of mixture, including surface tension, contact angle, viscosity, thermal conductivity and saturated vapor pressure, were tested spanning a range of mass concentration from 0 ppm to 1200 ppm. The results showed that a trace of surfactant had a great impact on water-based liquid. The surface tension and contact angle, interrelated parameters, significantly reduced with the low adding concentration and almost unchanged with the high adding concentration. The viscosity was considered to have no obviously effect, and the saturated vapor pressure had the some conclusion unless it is under the high adding concentration. Furthermore, the heat transfer experiment clearly indicated the difference of heat transfer performance in spray cooling in view of different kinds of surfactants and different adding concentrations.