低β值喉部取压喷嘴在给水流量测量中的应用  

ACCURACY IMPROVEMENT OF FEEDWATER FLOW MEASUREMENT BY ASME LOW β RATIO THROAT-TAP NOZZLE

作　　者：江浩[1] 于新颖[1] 郭俊文[1] 常东锋[1] 王浩[1] 李欣[1] 黄嘉驷[1] 李杨[1] 周元祥[1] 谢天[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2012年第10期44-47,共4页Thermal Power Generation

摘　　要：对焊接结构的低β值喉部取压长颈喷嘴用于给水流量测量的分析表明,采用经过校验后的焊接结构低β值喉部取压长颈喷嘴测量给水流量的不确定度≤0.25%,符合ASME PTC6作为机组性能验收试验的要求,且具有宽量程、低能耗等特点。Low β ratio throat-tap long-nozzle with welded structure was used to measure the feedwater flow.Results indicate that,measurement uncertainty of the calibrated nozzle is less or equal to 0.25%,which satisfies the ASME PTC6,namely the requirements for unit performance acceptance test.Moreover,this kind of nozzle with diffuser not only has high measuring accuracy,but also has wide range and low energy consumption.

关 键 词：给水流量 测量 低β值 喉部取压 喷嘴 焊接结构 

分 类 号：TK313[动力工程及工程热物理—热能工程]