基于相变蓄热装置的车用柴油机SCR反应器控温系统设计  

Design of Temperature Control System for SCR Reactor of Automotive Diesel Engine Based on Phase Change Heat Storage Device

作　　者：张殿彤 刘林峰 ZHANG Diantong;LIU Linfeng(Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《自动化与仪器仪表》2023年第12期201-204,共4页Automation & Instrumentation

摘　　要：为了控制车用柴油机选择性催化还原(Selective Catalytic Reduction,SCR)反应器的反应温度,降低柴油机车辆废气中NOx排放。研究基于相变蓄热装置设计了一种车用柴油机SCR反应器的控温系统。该系统利用相变蓄热材料在工作过程中吸收和释放热量的特性,来实现对SCR反应器温度的精确控制。该系统的仿真实验测试结果显示,在100℃工况下,研究系统能保持几乎100%的控温效果,并且持续工作12 h,系统耐久度约为99.5%。而在300℃工况下,研究系统的温度会有5℃~10℃的浮动,并且持续工作12 h,系统耐久度约为97%。从100℃升温到350℃和580℃降温到350℃,研究系统分别用时约3.2 min和1.6 min。以上结果表明,相变蓄热装置能够实现快速的温度响应和稳定的温度控制,为车用柴油机SCR反应器的可靠运行提供了良好的条件。并且该控温系统具有较低的能耗和较高的耐久性,为实现车辆尾气的有效净化和环境保护提供了一种可行的解决方案。In order to control the reaction temperature of Selective Catalytic Reduction(SCR) reactor of automotive diesel engine and reduce NOx emission in diesel vehicle exhaust gas.A temperature control system of SCR reactor for automotive diesel engine is designed based on phase change heat storage device.The system uses the characteristics of phase change heat storage material to absorb and release heat in the working process to realize the precise control of SCR reactor temperature.The results of simulation experiments show that the research system can maintain almost 100% temperature control effect at 100 ℃,and work for 12 h,and the durability of the system is about 99.5%.Under the working condition of 300 ℃,the temperature of the research system will fluctuate by 5-10 ℃,and it will continue to work for 12 h,and the durability of the system is about 97%.The temperature rise from 100 ℃ to 350 ℃ and the temperature drop from 580 ℃ to 350 ℃ took about 3.2 min and 1.6 min respectively.The results show that the phase-change heat storage device can achieve rapid temperature response and stable temperature control,which provides a good condition for the reliable operation of SCR reactor for automotive diesel engine.And the temperature control system has lower energy consumption and higher durability,which provides a feasible solution for the effective purification of vehicle exhaust and environmental protection.

关 键 词：相变蓄热 车用柴油机 SCR反应器 温度控制 能耗 NOX废气 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] U464[自动化与计算机技术—控制科学与工程]