车用发动机
車用髮動機
차용발동궤
2015年
3期
45-50
,共6页
娄宗勇%郭珍%宋松松%张红光
婁宗勇%郭珍%宋鬆鬆%張紅光
루종용%곽진%송송송%장홍광
天然气发动机%余热回收%有机朗肯循环%非共沸混合工质
天然氣髮動機%餘熱迴收%有機朗肯循環%非共沸混閤工質
천연기발동궤%여열회수%유궤랑긍순배%비공비혼합공질
compressed natural gas engine%waste heat recovery%organic Rankine cycle%non-azeotropic mixture
针对一台车用天然气发动机排气能量的变化规律,建立了带回热器有机朗肯循环系统,对比分析了采用纯工质R245fa和非共沸混合工质R416A时,带回热器有机朗肯循环系统的净输出功率、热效率、效率和单位工质能量输出密度。结果表明,采用非共沸混合工质R416A时上述各项性能指标均优于采用纯工质R245fa。最后,构建了天然气发动机‐带回热器有机朗肯循环联合系统,采用非共沸混合工质 R416A ,分析了联合系统的热效率。结果表明,加装带回热器有机朗肯循环系统后,发动机热效率最大可提高7%。
針對一檯車用天然氣髮動機排氣能量的變化規律,建立瞭帶迴熱器有機朗肯循環繫統,對比分析瞭採用純工質R245fa和非共沸混閤工質R416A時,帶迴熱器有機朗肯循環繫統的淨輸齣功率、熱效率、效率和單位工質能量輸齣密度。結果錶明,採用非共沸混閤工質R416A時上述各項性能指標均優于採用純工質R245fa。最後,構建瞭天然氣髮動機‐帶迴熱器有機朗肯循環聯閤繫統,採用非共沸混閤工質 R416A ,分析瞭聯閤繫統的熱效率。結果錶明,加裝帶迴熱器有機朗肯循環繫統後,髮動機熱效率最大可提高7%。
침대일태차용천연기발동궤배기능량적변화규률,건립료대회열기유궤랑긍순배계통,대비분석료채용순공질R245fa화비공비혼합공질R416A시,대회열기유궤랑긍순배계통적정수출공솔、열효솔、효솔화단위공질능량수출밀도。결과표명,채용비공비혼합공질R416A시상술각항성능지표균우우채용순공질R245fa。최후,구건료천연기발동궤‐대회열기유궤랑긍순배연합계통,채용비공비혼합공질 R416A ,분석료연합계통적열효솔。결과표명,가장대회열기유궤랑긍순배계통후,발동궤열효솔최대가제고7%。
A set of organic Rankine cycle (ORC) system with internal heat exchanger (IHE) was designed to recover exhaust energy of a compressed natural gas (CNG) engine .The net output power ,heat release efficiency ,exergy efficiency and energy output density of ORC system for R245fa and R416A organic working fluids were compared and analyzed .The results show that the performance of R416A zeotropic mixture surpasses that of R245fa .Finally ,the CNG engine and ORC combined system with IHE is built and the thermal efficiency of R416A non‐azeotropic mixture is analyzed .It is found that the thermal efficiency of engine can increase by 7% at most .