Performance Analysis and Improvement of Micro Heat Exchanger in Liquid Cooling System

• Main Authors: Sy-Chi Kuo, 郭思齊
• Other Authors: Chien-Yuh Yang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/85910367682049973656

碩士 === 國立中央大學 === 機械工程研究所 === 94 === This paper describes a micro heat exchanger of a liquid cooling system. The single-phase heat transfer enhancement techniques are well established for micro heat exchangers. The major techniques include breakup of boundary layer, secondary flow and mixers. There are some methods to decrease pressure drop penalty. First, the inlet and outlet of exchanger. Second, the multilayer exchanger for chevron. The pressure drop and heat transfer characteristics of micro heat exchanger were investigated experimentally. The experimental results show that at the same pumping power. The thermal resistance of the Chevron30x3 is less than that Chevron30, OSF-Airfoil and Chevron30x4. And the chevron type of exchanger that can keep the maximum temperature below 70 oC. At the same flow rate, the pressure drop of the multilayer exchanger are less than that of the single-layer case, besides the OSF-Airfoil. Every kinds of micro heat exchanger have different performance of the pressure drop and heat transfer. We can choose exchangers that we need by the performance of pumping power and limited of the maximum temperature.