In order to study the effects of porous media on supercooling degree of ethanol solution

the experimental system of porous media with different porosities and thermal conductivities was built. The effect of ethanol concentration on the supercooling degree was investigated by changing the ethanol concentration. The method of heat transfer enhancement was explored by changing the porosity and thermal conductivity of porous media. The data were processed by statistical method and the experiment at each condition was repeated 32 times. The experimental results showed that the porosity and thermal conductivity of porous media had effects on the supercooling degree of ethanol solution. With decreasing porosity and increasing thermal conductivity

the average supercooling degree decreased

and the stability was improved. High concentration had obvious effect on decreasing the supercooling degree. The higher the concentration

the lower the average value and the maximum value of supercooling degree

while the change of concentration had little effect on the stability of supercooling degree.