家用燃气灶热效率测量及不确定度评定

Measurement of thermal efficiency and uncertainty evaluation of domestic gas stove

按照GB16410-2007家用燃气灶热效率的测量原理和方法,对测量结果进行了不确定度评定,分析了各输入量对评定结果的影响情况。作为对比,分析了标准状态改变和按旧国标测量时的热效率不确定度。结果表明:铝锅修正系数、上下限锅正投影面积、试验气标态低热值和水的温升对家用灶热效率测量结果影响较大,影响程度依次降低。折算系数、测量时间和实验水量的测量不确定度可忽略不计。标准状态的改变对热效率测量结果不确定度评定的影响很小。相比旧国标,新国标测量结果具有更大的不确定度。

The thermal efficiency of domestic gas stove was measured according to GB16410-2007 and the uncertainty of measurement was evaluated. The results show that the aluminum pan correction factor, the orthographic projection area of test pan, the net calorific value of test gas and the temperature rise of water have great impacts on the results of measurement but the effectiveness decrease in the order of the list. Measurement uncertainties of the conversion factor, the measuring time and the quality of water are negligible. Compared with the former edition of national standard, the new vision of the code has little impact on the uncertainty of measurement result while the result with new method has greater uncertainty.