以赤藻糖醇/甘露醇为相变材料基液，通过熔融共混两步法制备纳米二氧化钛-赤藻糖醇/甘露醇复合相变材料，探究纳米TiO₂质量分数、超声时间、超声功率等对复合相变材料传热特性的影响。结果表明，随着纳米TiO₂质量分数的增加，复合相变材料导热率逐渐增大，当质量分数为1.0%时，导热率提高24.1%，熔化时间最多可缩短63.3%；当仅以超声时间为变量时，最优熔化时间为1 h，熔化时间缩短58.0%；当仅考虑超声功率时，最优超声功率为100 W，熔化时间缩短53.4%。

Nano TiO₂-erythritol/mannitol composite phase change material is prepared by a melting/blending two-step method using erythritol/mannitol as the substrate liquid of phase change material.The effects of nano TiO₂ content, ultrasonic time, ultrasonic power, etc.on the heat transfer characteristics of the composite phase change materials are analyzed.Experimental results show that as the mass fraction of nano TiO₂ increases, the thermal conductivity of the material increases gradually.When the mass fraction of nano TiO₂ is 1.0%, the thermal conductivity of the material is increased by 24.1%, and the melting time is shortened by up to 63.3%;If the ultrasonic time is selected as the unique variable, the optimal melting time is 1 h, which is shortened by 58.0%;If only ultrasonic power is considered, the optimal value is 100 W, which shortens the melting time by 53.4%.

张瑞瑞(1996-),女,硕士研究生,研究方向为可再生能源利用与建筑节能技术,hncjzhangruirui@163.com。