Numerical Study on Heat Storage and Heat Transfer Characteristics of PCM Phase Transition with Reinforced Ribs
In order to effectively improve the performance of PCM phase change heat reservoir,a variety of metal fins are used to strengthen the phase change process,and the enthalpy-porous medium model is used to simulate the phase change heat storage process.The effects of different metal materials and different matrix porosity on the characteristics of phase change heat storage and heat transfer are analyzed.The results show that the heat conduction and convective effect can be enhanced by the metal foam reinforced fin,and the convective vortex distribution in the flow field can be optimized.The heat storage time of the heat reservoir phase transformation is greatly shortened,which is only 16.8%of that in the condition without fins.The energy storage efficiency of copper metal foam fin is better than that of aluminum metal foam fin,and the heat storage time is shortened by 3.47%.The porosity of reinforced fin has a weak influence on the heat storage performance.When the porosity is 0.4,it is the best,followed by 0.6,and the worst when 0.8.
phase change energy storagemetal foamfinsporosityparaffin wax
万方数据
维普
