斯特林式燃烧焓测量仪的教学方法设计

Teaching method design of Stirling combustion enthalpy measuring instrument

针对新研发的斯特林式燃烧焓测量仪,设计了一个适用于本科教学、测量有机物燃烧焓的标准化实验方法。首先测量有机物的燃烧速率和物质燃烧时测量仪的输出功率,然后建立数学模型,确立燃烧焓与输出功率间的数学关系,再利用一种标准物质(无水乙醇)标定仪器的热功转换效率,最后将待测物的燃烧速率和输出功率代入数学模型计算其燃烧焓。

In view of the newly developed Stirling type combustion enthalpy measuring instrument,a standardized experimental method for measuring the combustion enthalpy of organic matters is designed,which is suitable for undergraduate teaching.Firstly,the combustion rate of organic matter and the output power of the measuring instrument are measured.Then,a mathematical model is constructed to establish the mathematical relationship between the combustion enthalpy and the output power.Then,a reference material(anhydrous ethanol)is used to calibrate the thermal power conversion efficiency of the instrument.Finally,the combustion rate and the output power of the measured matter are brought into the mathematical model to calculate its combustion enthalpy.