Performance Experiment and Simulation Optimization Analysis of Radiation Plates Based on Micro Heat Pipe Arrays
Based on the advantages of high heat transfer efficiency,low water supply temperature and simple structure of the micro heat pipe array radiant panel,the performance of the radiant panel applied to a heated room was tested,simulated and optimized.Under the operating conditions of water supply temperature of 45 ℃ and a flow rate of 200 L/h,the heating capacity of the radiant panel was 220.0 W/m2,the radiation heat transfer accounted for 67.6％,and the total heat transfer coefficient was 10.9 W/(m2·K),which was higher than that of the traditional radiant terminal form.An analysis was conducted on the influence of water supply temperature and the flow rate on heat transfer performance.The heat supply of the radiant panel increased with the increase of water supply temperature and the flow rate,but the growth rate slowed down.Compared with the convective heat transfer,the change of water supply temperature and the flow rate has a more significant effect on the radiation heat transfer.A simulation model of the heat transfer process of the radiant panel was built,to obtain the temperature distribution and heat transfer thermal resistance of each part of the radiant panel and optimize its structure.By adding rectangular closed fins to the surface of the radiant plate to introduce forced convection,the heat supply of the radiant plate was increased by 31.3％under the same operating conditions.The research findings can provide experimental data and theoretical reference for the application of radiation plates based on micro heat pipe arrays.
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