基于有机朗肯循环的柴油机稳态工况废热回收的探讨  

Investigation on the Recovery of Waste Heat Based on Steady State of Rankine Cycle in Diesel Engine

作　　者：韩永强[1] 王先锋[1] 张雷[1] 王虎[1] 刘洪涛 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室 [2]长春一汽四环发动机制造有限公司

出　　处：《汽车技术》2015年第6期50-55,共6页Automobile Technology

摘　　要：为了探究可变膨胀比往复活塞式膨胀机有机朗肯循环系统对柴油机尾气余热利用的影响程度,基于某6缸增压柴油机构建GT-power仿真模型,在13工况下仿真并分析有机工质蒸发压力、膨胀比等与余热回收系统膨胀机效率和当量回收效率的关系。结果表明,膨胀比一定时,膨胀机输出的功率、效率及当量回收效率随蒸发压力的上升而提升;蒸发压力一定时,,膨胀机效率和当量回收效率随膨胀比上升先升高后降低;最佳的蒸发压力和膨胀比匹配可充分发挥有机朗肯循环余热回收系统潜力。In order to study the effect of organic Rankine cycle system of reciprocating piston expansion engine with variable expansion ratio on the exhaust gas waste heat utilization, a GT-power simulation model is built based on a 6-cylinder turbocharged diesel engine to analyze the relationship between the organic working medium evaporation pressure and expansion ratio on the expansion engine efficiency and equivalent recovery efficiency of the waste heat recovery system. Results show that with the specific expansion ratio, the output power, efficiency and recovery efficiency of the expansion engine increase with the rise of evaporation pressure. While with the specific evaporation pressure, efficiency and equivalent recovery efficiency of the expansion engine increase firstly and then decrease with the rise of expansion ratio. Thus, the optimum matching between evaporating pressure and expansion ratio can make full use of the potential of waste heat recovery system of organic Rankine cycle.

关 键 词：柴油机 尾气 余热利用 有机朗肯循环 稳态工况 

分 类 号：U464[机械工程—车辆工程]