基于空气动力循环的内燃机废气余热回收方法  

IC Engine Exhaust Energy Recovery Approach Based on Air Cycle

作　　者：付建勤[1,2] 刘敬平[1,2] 冯仁华[1,2] 王勇[1,2] 邓帮林[1,2] 

机构地区：[1]湖南大学先进动力总成技术研究中心,长沙410082 [2]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《内燃机工程》2014年第1期30-34,40,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家"九七三"重点基础研究发展计划项目(2011CB707201);湖南省研究生科研创新项目(CX2010B125)

摘　　要：为提高内燃机能量利用效率,提出了采用布雷顿空气循环回收内燃机废气余热能的底循环方案,并对其回收废气余热能的潜力进行了研究。针对不同的循环压力、循环空气流量和内燃机排气温度进行了循环多参数性能计算分析,得出该余热回收系统循环参数和内燃机排气温度对废气余热能回收效率的影响。研究结果表明:循环压力和空气流量范围受内燃机排气温度制约,排气温度越高,可用压力范围和空气流量范围越大,并且相应的回收效率也越高;分别存在一个最佳压力点和一个最佳空气流量点,使回收效率出现峰值。An approach to recover internal combustion engine exhaust energy based on Brayton air cycle was proposed and its potential was studied. Calculated and analyzed the bottom cycle process under different air pressure, air mass flow rate and exhaust temperature, effects of the recovery system cycle parameters and exhaust temperature on recovery efficiency were drawn. Results show that the effective ranges of air pressure and mass flow rate are limited by IC engine exhaust temperature; the higher the exhaust temperature, the larger the effective ranges of air pressure and mass flow rate, and also the higher the recovery efficiency; there are optimal values for air pressure and mass flow rate respectively, at them the recovery efficiency reaches peak value.

关 键 词：内燃机 布雷顿循环 余热回收 热效率 节能 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]