The Micro-meter-sized Vinyl Chloride Asperities Building and Frost Growth Controlling

Abstract

To prevent frost covering on a heat exchanger surface, several micro-meter-sized asperities were built by vinyl chloride dissolved into acetone solution. The building up procedure and cost were much smaller than electron beam drawing or other micro-fabrications. The silicon substrate was chosen as a substrate material, then it was cleaned by ultrasonic cleaning with acetone in 15 minutes. The vinyl chloride dissolved into acetone solution was put on the Si substrate, then it was set in a vacuum chamber. After the evaquation, the sample surface was cleaned by acetone again. The average asperities diameter were approximately 18.6 μm, 9.0 μm height, and 12.7 μm distance between each asperities. The frost observation in the ESEM was conducted. Photographs, illustrations and tables must have captions.