压缩空气泡沫系统冗余设计及可靠性评估  

Redundant Design and Reliability Assessment of Compressed Air Foam System

作　　者：王建渊[1] 闫瑾 李英杰[1] 王海啸 WANG Jianyuan;YAN Jin;LI Yingjie;WANG Haixiao(School of Electrical Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学电气工程学院,陕西西安710048

出　　处：《自动化仪表》2022年第8期84-89,共6页Process Automation Instrumentation

基　　金：西安市创新能力强基计划基金资助项目(2021JH-06-0046)。

摘　　要：面对化工、石油等领域市场占比持续增长的新形势,常规的压缩空气泡沫系统(CAFS)已无法发挥最大程度的灭火作用。为提升压缩空气泡沫系统应用于重大火灾场合的可靠性,在对比不同冗余设计方案的基础上,确定并联冗余路径为CAFS冗余设计的整体思路。对系统硬件中泡沫泵、空气压缩机和可编程逻辑控制器(PLC)中的电源模块、CPU模块及I/O模块均采用双重模块化冗余方式。通过计算分析CAFS冗余设计前后平均故障间隔时间(MTBF)、平均故障修复时间(MTTR)和可靠度(R)三种可靠性指标的变化,评估冗余设计对CAFS可靠性的影响。评估结果表明,双重模块化冗余设计使CAFS可靠性明显提高,满足大型工业设备高可靠性的工作要求。该研究成果为今后CAFS运行效率提升和自动化发展提供理论支撑。In the face of the new situation that the market share of chemical and petroleum fields continues to grow,the conventional compressed air foam system(CAFS)can no longer play the role of maximum fire extinguishing.To improve the reliability of compressed air foam system applied to major fire occasions,the parallel redundancy path is determined as the overall idea of CAFS redundancy design based on comparing different redundancy design solutions.Dual modular redundancy is adopted for the foam pump,air compressor and power supply module,CPU module and I/O module in programmable logic controller(PLC)in the system hardware.The impact of the redundancy design on the reliability of CAFS is evaluated by calculating and analyzing the changes of three reliability indexes,namely mean time between failures(MTBF),mean time to repair(MTTR)and reliability(R),before and after the CAFS redundancy design.The results show that the dual modular redundancy design makes CAFS reliability significantly improved and meets the working requirements of high reliability of large industrial equipment.The research results provide theoretical support for future CAFS operation efficiency improvement and automation development.

关 键 词：压缩空气泡沫系统 可靠性 冗余设计 并联冗余 双重模块化冗余 平均故障间隔时间 平均故障修复时间 

分 类 号：TH-39[机械工程]