Investigations on Heat Transfer Enhancement in Pool Boiling with Water-CuO Nano-Fluids  

作　　者：Ramakrishna N. Hegde Dr. Shrikantha S. Rao R. P. Reddy 

机构地区：[1]Research Scholar, National Institute of Technology, Surathkal/ Department of Mechanical Engineering, M S R I T, Bangalore, 560054 [2]Assistant Professor, Department of Mechanical Engineering, National Institute of Technology, Surathkal [3]Reva Institute of Technology, Yelahanka, Bangalore, 560064

出　　处：《Journal of Thermal Science》2012年第2期179-183,共5页热科学学报（英文版）

摘　　要：The main focus of the present work is to investigate Critical Heat Flux (CHF) enhancement using CuO nanofluid relative to CHF of pure water. To estimate the effect of nanoparticles on the CHF, pool boiling CHF values were measured for various volume concentrations of CuO nanofluid and compared with pure water. CHF enhancement of 130% was recorded at 0.2 % by volume of CuO nano-fluids. Surface roughness of the heater surface exposed to three measured heating cycles indicated surface modifications at different volume concentrations of nanofluid. SEM image of the heater surface revealed porous layer build up, which is thought to be the reason for CHF enhancement.

关 键 词：NANOFLUID pool boiling CHF enhancement nano-particle. 

分 类 号：TK124[动力工程及工程热物理—工程热物理] O643.36[动力工程及工程热物理—热能工程]