以赤藻糖醇为相变材料基液，分别添加不同质量分数的C和ZnO，通过两步法制备赤藻糖醇基相变材料，并分析了超声和纳米颗粒对赤藻糖醇基相变材料稳定性的影响。结果表明，纳米流体稳定性随着超声功率的增大先增强后变弱，C/赤藻糖醇纳米流体稳定性最大改善1.81%，ZnO/赤藻糖醇纳米流体稳定性最大改善19.21%；C/赤藻糖醇纳米流体的稳定性随着超声时间的增大先增强后变弱，最大可改善1.67%，超声时间对于ZnO/赤藻糖醇纳米流体的稳定性改善有着抑制作用。功率/时间-浓度-总体吸光度关系曲线均符合四次多项式形式。在融化后期，较高浓度的纳米颗粒会抑制融化的进程。

Erythritol-based phase change material is prepared through a two-step method by using erythritol as a phase change material basic solution and adding different concentrations of C and ZnO,respectively.The effects of ultrasound and nanoparticles on the stability of erythritol-based phase change materials are analyzed.Experimental bench is built to test the heat storage ability of the prepared erythritol-based phase change materials.The results show that the stability of nano-fluid enhances firstly and weakens then with the increase of ultrasonic power,and the stabilities of C/erythritol nano-fluid and ZnO/erythritol nano-fluid are improved by up to 1.81% and 19.21% respectively.With the prolonging of ultrasonic action time,the stability of C/erythritol nano-fluid increases firstly and weakens then,with the maximum improvement of 1.67%.Ultrasonic action time inhibits the stability improvement of ZnO/erythritol nano-fluid.The relation curves among power/time,concentration and total absorbance all conform to the quadric polynomial form.Higher concentrations of nanoparticles will inhibit the melting process in the later stages of melting.

刘杰梅(1994-),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,13920962527@163.com