Study On Temperature And Strain Characteristics Of Glass Enclosure Structure With Embedded Paraffin Phase Change Material

The glass enclosing structure plays a pivotal role in the building,but its light transmission is strong,and the large amount of heat transfer causes the building energy consumption to be high.It is one of the problems that need to be solved urgently to develop a new-type glass enclosing structure.By adding paraffin phase change material in glass envelope,it can effectively improve its thermal insulation and optical properties,and also cause its mechanical properties to change.As a result,In this paper,the temperature and strain characteristics of the envelope with 18 degree melting point are studied.Set up the experimental platform of paraffin glass structure,Change the temperature difference and other environmental conditions of paraffin glass structure.The temperature and strain of the surface of glass structure were measured by thermocouple and strain gauge.Based on the experimental and theoretical analysis results,the numerical model is simplified.ANSYS software was used to solve the model,and the experimental data were compared and analyzed to verify the feasibility of the calculation method.Then,the temperature and strain characteristics of paraffin glass envelope were studied by ANSYS software.The main contents of this paper are as follows:1.In this paper,five experimental cases of paraffin glass enclosure structure were designed with the thickness of 3mm~11mm respectively,and the temperature and strain conditions of different test points were measured for the enclosure structure of paraffin glass envelope.The results show that compared with the strain,the thickness of paraffin wax has a weak influence on the temperature measurement point.With the increase of the thickness of paraffin wax,the temperature and strain of the measuring point show a slow trend with the change of environment.2.The latent heat of paraffin wax was treated by enthalpy value method.A two-dimensional heat transfer model with paraffin glass envelope was established.Based on ANSYS software,the influence of phase change latent heat was analyzed.It was found that the influence of paraffin phase transition latent heat on its temperature field was significant,and the thickness of paraffin wax increased.3.A three-dimensional strain model of paraffin glass envelope was established,and ANSYS software was used to solve the problem.When analyzing the structural temperature strain of paraffin glass.As the initial condition of the simulated strain,the temperature dataobtained from the experiment was simulated by ANSYS.The results show that the maximum error of the simulation results is less than 25%.4.Based on ANSYS,the influence of the length and width ratio of the paraffin glass enclosure structure,the height of filling paraffin and the strain of different temperature difference were studied.The study found that the structure of paraffin glass had a long width ratio of 3:2 and the height of paraffin was 4/5 of the height of the glass envelope,and the surface of the glass structure was relatively small.The glass temperature at the inside of the test box is 25 degrees.When the temperature of the other side is different,the glass structure has a greater strain.Local strain simulation shows that the maximum strain of strain is distributed in the corner and surrounding area,and the distribution area is relatively small.The research results of this paper provide some theoretical and data support for the design of glass enclosure structure containing paraffin phase transition materials.