CONVECTIVE HEAT TRANSFER BEHAVIOR OFAQUEOUS TiO2 NANOPARTICLES SUSPENSION (NANOFLUIDS) FLOWINGTHROUGH COOLING STAVE
As a kind of Energy-saving and environmentally friendly material, more and more studies on the industrial application of nanoparticles suspension were carried out. Addition of nanoparticles added into the base liquid markedly enhanced thermal conductivity of base liquid. It could improve the heat transfer capacity of the heat exchange device as well. In this work, a new experimental system including a cooling stave is developed to simulate the industrial process. To analyze the convective heat transfer behavior of aqueous TiO2 nanoparticles suspension, three kinds of nanoparticles suspension with different concentration are formulated by two-step method. The convective heat transfer coefficients of nanoparticles suspension are then measured while they’re flowing through the cooling stave. Given the temperature of hot surface, the convective heat transfer coefficient increases with the concentration and the effect of particle concentration seems to be similar in various velocity. However, the convective heat transfer coefficient enhancement decreases with increasing temperature on the hot surface of the stave. The enhancement of suspensions heat transfer convective is analysis based on inhomogeneous fluid behavior. The experimental result also indicates there is huge potential for using this special kind of cooling medium in the steel industrial process.
Aqueous TiO2 nanoparticles suspension Convective heat transfer Cooling stave Temperature Inhomogeneous fluid Industrial application
Yi Jin Lingling Zhang Daqiang Cang Hao Bai Yanbing Zong
School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beij Civil and Environment Engineering School University of Science and Technology Beijing Beijing China
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
968-973
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）