The Research Of Polypropylene Honeycomb Plate About Heat Transfer Performance

Polypropylene honeycomb panel is made of high-resolution polypropylene material,it contains the upper-skin,the down-skin and the middle of the honeycomb structure.Polypropylene honeycomb panels have merits such as heat-insulation,noise-insulation,high strength,good light transmission characteristics.with the craft process is mature,in recent years more and more honeycomb panels have been used in construction and transportation and other fields.Since the early honeycomb material is mainly used in the field of aerospace,domestic and foreign scholars did a full study on its structural properties and mechanical properties,but other sides like sound insulation and other excellent characteristics of the study are relatively inadequate.In this paper,ANSYS finite element method is used to study the heat preservation and heat transfer performance of honeycomb panels.The research contents are as follows:1.The model of honeycomb plate heat transfer was established by ANSYS finite element method.The model was simulated and analyzed by ANSYS Mechanical APDL?ANSYS?.The temperature and heat flux distribution of the honeycomb structure were obtained.2.The equivalent thermal conductivity of the honeycomb panels of the same size was measured using theintelligent doors and windows insulation performance tester,and the results were compared with the simulation simulations with a relative error of 3.99%,which verified the established model The accuracy and correctness.3.The relationship between the size of the cell and the equivalent thermal conductivity was designed by orthogonal test.The five dimensions of the orthogonal test were A?cell cavity length?,B?honeycomb cell cavity Width?,C?cell wall thickness of honeycomb cells?,D?hot surface skin thickness?,E?cold surface skin thickness?,each factor corresponds to four levels.The orthogonal experiment design was carried out by analyzing the orthogonal table L16 of five factors and four levels.4.Simulation of 16 groups of honeycomb panels of different sizes by ANSYS finite element method was used to simulate the temperature,heat flux distribution and equivalent thermal conductivity of honeycomb cells under different sizes.The influence of the five dimensions on the equivalent thermal conductivity of the honeycomb plate is C>A>E>B>D,respectively,using the statistical analysis software Minitab to analyze the data of the orthogonal test with the difference and variance.The effect of the four levels of the four factors on the value of the analysis,the orthogonal experiment under the optimal level of combination of 4,3,1,4,1,that is,the size of the cellular cell structure is₁a=50.0mm,a₂=28.0mm,₁d=1.0mm,d₂=5.0mm,d₃=2.0mm when the honeycomb plate equivalent thermal conductivity of the lowest,the best insulation properties,and it improves 28.1%by the experiment.