Study On Experiemtal Of Expanded Perlite Carrier Phase Change Energy Storage Materials

Today’s global energy crisis has become increasingly prominent. The relationshipbetween energy supply and demand is particularly tense in our country and buildingenergy consumption is accounted for the country’s total energy consumption of1/3. Atpresent, energy consumption of the existing buildings is up to more than95%. Therefore,the construction of energy-saving technology research and application is very important.Under the national energy-saving environmental protection policy, the developmentprospects of building energy conservation technology is quite optimistic. This papermainly studies the material preparation and the properties of the composite phase changeenergy storage.Phase change energy storage material is through the phase between the conversion,and to absorb or release heat to achieve the effect of temperature control. This paperselects the high quality porous expanded perlite and solid-liquid phase change energystorage materials of lauric acid by physical melting method, composite phase change andthe prepared materials will be made a series of experiments to study its properties.The composite phase change energy storage material leakage degree was tested bydiffusion from the circle method, results show that the percentage Φ of exudation ofcomposite phase change energy storage of four sets of experiments were less than10%.The exudation of criterion in practical application is very stable. The composite phasechange energy storage experiment after many phase change material durability by massloss method, results show that after repeated cyclic phase transformation of compositephase change energy storage material quality basically unchanged, proved its durabilityin the actual application process is very good. The water bath immersion methodexperiments show that under atmospheric pressure, expanded perlite impregnationtemperature is70℃, the soaking time is1hour and under the environment of phasechange energy storage material for adsorption of lauric acid is appropriate. At the sametime, phase change composite of different amount of material added to the cement mortarexperiments of tensile test and the effect of temperature control. The experimental resultsshow that with the increase of composite phase change energy storage material, cementmortar compressive strength and flexural strength decrease to some extent, but the effect of temperature control will be increased. Before guaranteeing strength meeting thestructural safety, the amount of composite phase change energy storage material shouldbe increased. From the cooling curve can be seen in the composite phase change energystorage materials that lauric acid crystallization temperature is close at42℃-43℃,which shows that the material has no super cooling phenomenon, and energy can be fullyutilized. Through the DSC experiment analysis shows that, with the increase of thecontent of composite phase change energy storage material, the phase transition enthalpyvalue is on the increase, but the content is suitable for5%-8%.