The investigation of enhanced pool boiling heat transfer performance for TiO2-R141b nanofluid using ultrasonic vibration
This research adopted the two-step method to make TiO2-R141b nanofluid and discusses the effect of nanofluid on heat transfer performance in different concentrations (0 Vol%,0.01 Vol%,0.001 Vol%,0.0001 Vol%).Scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS) observations reveal that some of the TiO2 nanoparticles adhere to the heated surface during the boiling process.As a result,the heat transfer performance is poorer than that obtained using pure R141b as the working fluid.Accordingly,a further investigation is performed in which the heated surface is vibrated ultrasonically.After applying ultrasonic vibration,acoustic cavitation is created.The results show that the acoustic vibration suppresses the formation of the nano-sorption layer and then improves the overall heat transfer performance.
Nanofluids pool boiling ultrasonic vibration
Tong-Bou Chang Tsung-Yu Tsai
Department of Mechanical Engineering,Southern Taiwan University,Tainan,TAIWAN
国际会议
西安
英文
1-16
2012-08-26（万方平台首次上网日期，不代表论文的发表时间）