居家实验:石蜡的简单热学性能测量

EXPERIMENT AT HOME: SIMPLE MEASUREMENT OF THERMAL PROPERTIES OF PARAFFIN

本文以太阳能相变蓄热领域中具有应用前景的相变材料-石蜡作为研究对象,针对与相变蓄热相关的物理性质,设计了石蜡的密度、体积膨胀率、相变温度、相变潜热的测定与研究实验。本实验包含了丰富的物理思想,同时也具有操作简便、设备简单、花费低廉、没有危险性的特点。通过该实验可锻炼实验动手能力,数据分析能力,以及加深对相关热学原理的理解。适合学生进行居家实验,是疫情期间可供选择的教学实验。

It is undoubtedly a troublesome thing to do a“regular experiment”in the laborato-ry.In this paper,the experiments were designed to measure the density,volume expansion,phase change temperature and latent heat of phase change of paraffin,a promising phase change material in the field of solar phase change heat storage.The exploration of thermal properties of paraffin contains rich physical ideas,but also has the characteristics of simple op-eration,simple equipment,low cost and almost no risk.It can also exercise students􀆳practi-cal ability and academic thinking ability,and provide a deeper understanding of relevant ther-mal principles.So it is very suitable experiment for students to carry out at home,and is a good choice for home experiments during the COVID-19 period.