鍋爐熱效率測試的不確定度分析

張勇勝 馬曉斌 劉永剛

河北省電力研究院,河北石家莊050021

摘　要:介紹鍋爐熱效率熱損失法的不確定度分析原理，包括不確定度分析模型的建立．對不確定度分量進行A類或B類評定及合成．以及擴展不確定度的計算方法等．并進行了600Mw機組鍋爐熱效率測試不確定度的評定。結果表明．影響鍋爐熱效率熱損失法測試結果的不確定度因素主要有排堝氧量、排姻溫度以及計算時所采用的GBl0184-88推薦的散熱損失曲線等。降低測試結果的不確定度應主要考慮降低這些參數的不確定度。[著者文摘]

ANALYSIS OF UNCERTAINTY IN BOILER THERMAL EFFICIENCY TESTZHANG Yong- sheng, MA Xiao- bin, LIU Yong- gangHebei Provincial Electric Power Research Institute, Shijiazhuang 050021, Hebei Province, PRCAbstract:The principle of uncertainty analysis from heat loss method of boiler thermal efficiency has been presented, including the establishment of uncertainty analysis model, the evaluation of uncertainty components as A and B kind, and their composition, as well as the calculation method of the expand uncertainty etc. , and the evaluation of uncertainty in boiler thermal efficiency test being carried out. Results show that the affecting factors upon test results from heat loss method of boiler thermal efficiency are mainly as follows： the oxygen content in discharged flue gas; the temperature of discharged flue gas; and dissipation heat loss curves recommended to use at the time of calculation etc.. In order to reduce the uncertainty of test result, it is necessary to mainly consider how to reduce the uncertainty of these parameters.[著者文摘]

Key words:boiler, thermal efficiency; uncertainty in measurement; heat loss method