An Investigation on Exhaust Heat Recovery from a Diesel Engine Based on Supercritical Power Cycle
The application of Organic Rankine Cycle(ORC)has been growing in the field of utilization of waste heat from engine exhaust gases.Feasibility study has been carried out on exhaust heat recovery from diesel engine using supercritical power cycle in present work.Supercritical power cycle has several significant advantages in the heat recovery of engine exhaust,including lower exergy destruction rate and higher thermal efficiency and enthalpy drop compared with subcritical process.Parameters optimization of ORC systems are performed with pentane as working fluid in terms of ten indicators.All optimum indicators appear at supercritical stage,showing great advantage of supercritical power cycle in waste heat recovery of engine exhaust gases.Maximum improvement of brake fuel consumption rate(BSFC)and maximum thermal efficiency of combined system of diesel engine with bottoming ORC(E-ORC)are 8.1%and 45.5%respectively,which exhibit significant improvement of E-ORC combined system compared with the original engine.
Exhaust Heat Recovery Supercritical Power Cycle Subcritical Power Cycle
Xiaoning Li Gequn Shu Hua Tian Haiqiao Wei Zhiyong Huang
State Key Laboratory of Engines,Tianjin University,Tianjin Tianjin Internal Combustion Engine Research Institute,Tianjin
国际会议
桂林
英文
1-14
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）