六水合氯化钙基相变材料对岩棉保温板储能和保温性能的影响

摘要/Abstract

摘要： 以岩棉板为载体,将自主研制的六水合氯化钙基相变储能材料均匀渗入到岩棉板,制备了六水合氯化钙基相变材料改性的岩棉/六水合氯化钙基保温墙板,研究了六水合氯化钙基相变材料对岩棉板储能隔热能力及其力学强度的影响.结果表明:相变材料加入赋予了岩棉吸热储能性能,使岩棉板保温性能得到提高.岩棉板对六水合氯化钙基相变材料的最大吸附量为30 wt.%,且该吸附量下的保温岩棉墙板显示出最大的比热容0.700 1 MJ/(m³·K).尽管该吸附量下复合板显示较大的导热系数0.089 1 W/(m·K),但其相应热扩散率却最小,为0.127 3 mm²/s.热温度测试表明该吸附量下室内最高温度降幅达到3.4 ℃,表明导热系数不是影响岩棉板保温性能的唯一因素,采用热扩散率评估其保温性能更为合理.SEM显示六水合氯化钙基相变材料黏附于岩棉纤维之间且形成了稳定的空间网格架构,有效提高了岩棉板的抗压强度.

关键词: 六水合氯化钙, 岩棉板, 储能隔热材料

Abstract: 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/calcium chloride hexahydrate-based phase change insulation wall board. The influence of calcium chloride hexahydrate-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 adsorption 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 conductivity is not the only factor affecting the thermal insulation performance of rock wool board, and it is more reasonableto evaluate thermal insulation performance by using thermal diffusivity.SEM showed that calcium 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.

Key words: calcium chloride hexahydrate, rock wool board, energy storage and thermal insulation material

中图分类号:

TB321

杨效田, 王彩龙, 刘俊艳, 高慧, 何承骏. 六水合氯化钙基相变材料对岩棉保温板储能和保温性能的影响[J]. 兰州理工大学学报, 2024, 50(1): 27-34.

YANG Xiao-tian, WANG Cai-long, LIU Jun-yan, GAO Hui, HE Cheng-jun. Effect of calcium chloride hexahydrate-based phase change material on energy storage and thermal insulation performance of rock wool insulation board[J]. Journal of Lanzhou University of Technology, 2024, 50(1): 27-34.

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