制冷压力容器的安全阀泄放口径计算方法探讨  

Research on calculation of relief diameter of safety valve for refrigeration pressure vessels

作　　者：熊从贵 何静 林家锋 XIONG Conggui;HE Jing;LIN Jiafeng(Taizhou Longjiang Chemical Machinery Science and Technology Co.,Ltd.,Wenling 317500,China)

机构地区：[1]台州龙江化工机械科技有限公司,浙江温岭317500

出　　处：《压力容器》2022年第5期60-65,共6页Pressure Vessel Technology

基　　金：浙江省质监科研项目(20180380)。

摘　　要：我国制冷压力容器产品标准中规定的安全阀泄放口径的计算方法历经了3次重大修改,即GB 150—89,JB/T 6917—1993和NB/T 47012—2020。通过举例,对3种计算方法和计算结果进行了对比分析,发现JB/T 6917—1993,NB/T 47012—2020的计算方法没有考虑制冷剂的汽化潜热、绝热层对汽化量的影响,与采用GB/T 150.1—2011的通用计算方法所得结果存在很大差异。基于制冷系统中冷凝器、蒸发器和分离器的工作原理,提出了三者的安全泄放量计算方法。The calculation method of safety valve relief diameter specified in Chinese standard for refrigeration pressure vessel products has undergone three major modifications, namely GB 150—89,JB/T 6917—1993 and NB/T 47012—2020.Through the comparative analysis of the three calculation methods and calculation results through examples, it is found that the calculation methods of JB/T 6917—1993 and NB/T 47012—2020 did not consider the influence of the vaporization latent heat of the refrigerant and the insulating layer on the vaporization capacity, which are very different from the results obtained by the general calculation method of GB/T 150.1—2011.Based on the working principle of condenser, evaporator and separator in the refrigeration system, the formula and method for calculating the safe relief capacity of condenser, evaporator and separator were proposed.

关 键 词：制冷压力容器 安全阀 泄放口径 绝热层 计算方法 

分 类 号：TH49[机械工程—机械制造及自动化] TH134.1