燃气锅炉热效率不确定度建模与测量方法选择性研究  

Study on Uncertainty Modeling and Test Method Selectivity for Thermal Efficiency of Gas-Fired Boiler

作　　者：胡超 严祯荣 王莉 胡玉龙 刘长福 钱钧 笪耀东[4] HU Chao;YAN Zhenrong;WANG Li;HU Yulong;LIU Changfu;QIAN Jun;DA Yaodong(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Mechanical Industrial Key Laboratory of Boiler Low-Carbon Technology,Shanghai 201620,China;Inner Mongolia Special Equipment Inspection and Research Institute,Hohhot 010000,China;China Special Equipment Inspection&Research Institute,Beijing 100029,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]机械工业锅炉低碳化技术重点实验室,上海201620 [3]内蒙古自治区特种设备检验研究院,内蒙古呼和浩特010020 [4]中国特种设备检测研究院,北京100029

出　　处：《锅炉技术》2023年第3期16-21,共6页Boiler Technology

基　　金：国家市场监督管理总局科技计划资助项目(2020MK019)。

摘　　要：为实现燃气锅炉节能降耗精细化管理,基于不确定度评定理论开展了燃气锅炉热效率测量方法的选择性研究。结果表明:燃气锅炉的正平衡测量法测试中,给水流量测量对热效率不确定度影响最大;反平衡法测量法测试中,排烟温度和排烟处O_(2)的测量对热效率不确定度影响最大。降低燃气锅炉热效率测量的不确定度主要是减少温度类与流量类测量的不确定度。燃气锅炉的反平衡测量法所测得的热效率扩展不确定度为0.193%,仅为正平衡测量法的热效率扩展不确定度的52.7%,因此,在进行燃气锅炉热效率测量时可仅选择反平衡测量法测试,这可以大大降低大量燃气锅炉热效率测试的劳动强度,为GB/T 10180—2017《工业锅炉热工性能试验规程》的修订提供理论依据。In order to realize the refined management of energy saving and consumption reduction of gas-fired boilers,this paper carries out a selective study of thermal efficiency measurement methods of gas-fired boilers based on uncertainty assessment theory.The results show that the feed water flow measurement has the greatest influence on the uncertainty of thermal efficiency in the test of positive balance measurement method of gas boiler,and the measurement of exhaust flue gas temperature and O_(2) at exhaust flue gas has the greatest influence on the uncertainty of thermal efficiency in the test of counter balance measurement method,therefore,the uncertainty of thermal efficiency measurement of gas-fired boiler is reduced mainly by the uncertainties of temperature class and flow class measurements.The expanded uncertainty of thermal efficiency measured by the counter balance measurement method of gas-fired industrial boiler is 0.193%,which is only 52.7% of the extended uncertainty of thermal efficiency by the positive balance measurement method,therefore,only the counter balance measurement method can be chosen to test the thermal efficiency of gas-fired boiler,which can not only greatly reduce the labor intensity of thermal efficiency test of a large number of gas-fired industrial boilers,but also provide a theoretical basis for the revision of GB/T 10180—2017 Thermal Performance Test Code for Industrial Boilers.

关 键 词：燃气锅炉 正平衡测量法 反平衡测量法 热效率不确定度 方法选择性 

分 类 号：TK229.8[动力工程及工程热物理—动力机械及工程]