Vitrified Microsphere, The Performance Analysis Of External Thermal Insulation Wall

Today’s society, to pay more and more attention to building energy consumption in the world, with the research of thermal insulation material in the construction field, all sorts of new thermal insulation material field.Vitrified beads insulation mortar is one of the adiabatic fine inorganic material. This article main research vitrified microsphere, external thermal insulation wall insulation, the mixture ratio of optimized vitrified beads insulation mortar, through the heat transfer coefficient tester tests verify the vitrified beads insulation wall insulation, and use ANSYS FLUENT commercial software for numerical simulation was carried out, to verify the vitrified beads insulation mortar can effectively reduce the heat bridge effect and meet the demands of indoor environmental comfort.For the experiment of the thermal performance of heat preservation wall body. Experiment showed that the porous brick as the main structure of the vitrified beads insulation wall thermal insulation system, its heat transfer coefficient to meet energy-saving standard of hot summer and cold winter region, the actual value with the theoretical value is 2.61%.With ansys fluent software for vitrified microsphere, the steady-state numerical simulation analyses of external thermal insulation wall with no heat preservation, polystyrene board insulation and do analysis and comparison, the following conclusion: heat bridge internal surface temperature is less than the main wall inner surface temperature, maximum temperature difference in the two materials; Vitrified beads insulation materials reduces the thermal bridge structure of the heat flux density,reduced the influence of thermal bridge site, reach thermal bridge as the main body wall thickness of one over fifteen to one 9; The inner surface temperature, condensation temperature is much higher than vitrified beads insulation mortar heat preservation effect is good. Heat insulation(no heat preservation, the three kinds of vitrified beads insulation mortar,polystyrene board) the influence of different thermal bridge, in which no heat preservation’s sphere of influence is the largest, vitrified beads insulation mortar reach minimum thermal bridge, and can be very good to reduce the heat bridge effect of structures, Without thermal insulationstructure, the minimum temperature is less than the dew point temperature,architectural structure should do heat preservation, reduce the heat bridge effect; If the use of polystyrene insulation materials, air conditioning board parts should be tested for insulation, can greatly reduce the influence of thermal bridge effect.For vitrified microsphere, external thermal insulation wall transient numerical simulation and make comparison and analysis with no heat preservation, the following conclusions are drawn: the summer inside wall body surface temperature change in a day is about 1 ℃, the change in every day during the winter the temperature of the wall inner surface and maintain gradually stabilized at about 2 ℃, the temperature change is small,meet the demands for indoor environment comfort; Whether in winter or summer, variations in the temperature of vitrified beads insulation wall inner surface smaller than that without heat preservation temperature range,explain vitrified beads insulation mortar amount heat preservation performance is good, indoor temperature change is small, more can meet the demands of indoor environmental comfort.