Effect of calcium chloride hexahydrate-based phase change material on energy storage and thermal insulation performance of rock wool insulation board
Using rock wool board as carrier,the self-developed calcium chloride hexahydrate-based phase change energy storage material was uniformly infiltrated into rock wool board to prepare rock wool/calci-um chloride hexahydrate-based phase change insulation wall board.The influence of calcium chloride hexa-hydrate-based phase change material on the energy storage and thermal insulation capacity of rock wool board was studied,and its mechanical strength was tested.The test results showed that the maximum ad-sorption capacity of rock wool board on calcium chloride hexahydrate-based phase change material is 30 wt.％,and maximum specific heat capacity is 0.700 1 MJ/(m3·K).Although the composite plate show a large thermal conductivity of 0.089 1 W/(m·K)under this adsorption capacity,the corresponding thermal diffusion is the smallest of 0.127 3 mm2/s.Thermal temperature test showed that the maximum indoor temperature drop by 3.4 ℃ under this adsorption capacity,which indicates that thermal conductivi-ty is not the only factor affecting the thermal insulation performance of rock wool board,and it is more reasonable to evaluate thermal insulation performance by using thermal diffusivity.SEM showed that cal-cium chloride hexahydrate-based phase change material is adhered to rock wool fibers and form a stable spatial grid structure,which effectively improve the compressive strength of rock wool board.
calcium chloride hexahydraterock wool boardenergy storage and thermal insulation material
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