真空绝热式氧弹热量计的研制与分析  

Development and Analysis of Vacuum Adiabatic Oxygen Bomb Calorimeter

作　　者：胡彪 兰赛 谭中柱 刘晨 胡宇航 HU Biao;LAN Sai;TAN Zhongzhu;LIU Chen;HU Yuhang(Hunan Institute of Measurement and Testing,Changsha 41004,China;Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南省计量检测研究院,长沙410014 [2]湖南科技大学,湘潭411201

出　　处：《计量科学与技术》2023年第3期43-49,共7页Metrology Science and Technology

基　　金：湖南省自然科学基金科市联合项目(2022JJ90010);国家市场监督管理总局科技计划项目(2020MK071)。

摘　　要：为了更好的满足能源物资的贸易结算、清洁利用以及碳排放核算等需求,提升可燃物质发热量的测量精度和准确度,研制了基于真空杜瓦瓶技术的高精度绝热式氧弹热量计。介绍了热量计的基本结构和工作原理,提出了与之适用的测试流程和试验方法。燃烧热物质以美国标准与技术研究院(NIST)的苯甲酸(SRM39j)为例,测试了热量计的热容量和燃烧物的发热量,评定了发热量示值误差不确定度,讨论了温度电路的线性度、发热量的有效范围和热量计的环境适应性。试验数据表明,热容量的相对标准偏差为0.047%,3个月变化量为0.138%,苯甲酸发热量示值误差为17.8 J·g^(-1),测量扩展不确定度为27.8 J(k=2),温度电路的线性度为0.999 93,有效测试范围为15 800~37 000 J,热量计环境适应性有待加强。In order to better meet the needs of trade settlement,clean utilization,and carbon emission accounting for energy materials,and to improve the measurement accuracy and precision of the calorific value of combustible materials,a high-precision adiabatic oxygen bomb calorimeter based on vacum Dewar bottle technology was developed.This paper introduces the basic structure and working principle of the calorimeter,and proposes a suitable testing procedure and method.The calorimeter's heat capacity and the calorific value of combustion materials were tested using benzoic acid(SRM39j)from the National Institute of Standards and Technology(NIST)as an example.The error uncertainty of calorific value indication was evaluated,and the linearity of the temperature circuit,the effective range of calorific value,and the environmental adaptability of the calorimeter were discussed.Test data show that the relative standard deviation of heat capacity is 0.047%,the change over three months is 0.138%,the calorific value indication error for benzoic acid is 17.8 Jg',and the expanded uncertainty of measurement is 27.8 J(k-2).The linearity of the temperature circuit is 0.99993,the effective testing range is 15800-37000 J,and the environmental adaptability of the calorimeter needs to be improved.

关 键 词：计量学 真空 热量计 热容量 燃烧热 氧弹 碳中和 碳达峰 

分 类 号：TB941[一般工业技术—计量学]