摘要
膨胀机是朗肯循环的核心做功部件,相对于涡轮膨胀机,往复活塞式膨胀机更适合于回收发动机废气余热,研究活塞式膨胀机的热力过程对于优化朗肯循环的效率有重要的参考价值.为此,建立了往复活塞式膨胀机的热力过程计算模型,并计算分析了主要技术参数对膨胀机的性能影响规律.结果表明,进气压力和转速增大以及进气门关闭时刻的推迟都会导致往复活塞式膨胀机输出功和质量流量的增大,但会导致卡诺循环完成效率的降低.
Expander is a key work component of Rankine cycle system. Compared with turbine expander, reciprocating piston expander is more suitable for waste heat recovery of engine. Studying the thermodynamic process of piston expander is helpful for optimizing the efficiency of Rankine cycle. The calculation model of the working process of reciprocating piston expander was established, and the impact of technical parameters on the performance of the expander was then analyzed. The results show that the increase of inlet pressure, rotational speed and valve opening degree can lead to increased power and mass flow rate of reciprocating piston expander, but meanwhile, the achievable Carnot efficiency will be reduced.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2011年第8期665-670,共6页
Journal of Tianjin University(Science and Technology)
基金
国家高技术研究发展计划(863计划)资助项目(2009AA045103)
关键词
往复活塞式膨胀机
发动机
余热回收
朗肯循环
reciprocating piston expander
engine
waste heat recovery
Rankine cycle
