燃煤工业锅炉热效率不确定度计算分析

Calculation and analysis on the uncertainty of thermal efficiency for coal-fired industrial boilers

建立了燃煤工业锅炉热效率不确定度数学模型,并对一台燃煤导热油锅炉热工测试反平衡热效率进行不确定度计算分析。排烟处CO含量、炉渣可燃物含量、收到基氢、飞灰可燃物含量和收到基硫的不确定度分量对反平衡热效率的不确定度影响较大。降低这些相关测量仪器的不确定度可以降低锅炉反平衡热效率的不确定度。

The uncertainty mathematical model of the thermal efficiency for coal-fired industrial boilers was established.A thermal oil boiler thermal test was employed as an example to illustrate the proposed method,and the uncertainty of anti-balance thermal efficiency was calculated.The result and analysis indicated that the uncertainty was most affected by CO′,Clz,Har,Clm,and Sar.Reducing the uncertainty of the related measuring instrument can improve the reliability of the anti-balance thermal efficiency.