有机朗肯循环发电系统设计及实验研究
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摘要
本文以90~150℃低温余热热源的回收利用为前提,搭建了有机朗肯循环(ORC)发电系统实验平台。通过调节透平膨胀机入口压力,改变蒸发温度,实验研究蒸发温度对膨胀机性能和系统性能的影响。结果表明:当蒸发温度从76℃升高到84℃时,膨胀机入口温度逐渐升高,使膨胀机转速增大约9.11%,膨胀机输出功率增大1.26 kW,最高等熵效率为80.6%;系统循环净功、热效率、不可逆损失及效率均随蒸发温度的升高呈增大趋势,分别增大了33.9%、26.7%、15.4%、27%。
Based on the premise of recycling the low-temperature waste heat from a 90-150 ℃ source,a test bench was designed for an organic Rankine cycle power generation system,and experimental research was performed.The effects of the evaporating temperature on the expander performance and system performance were investigated by adjusting the inlet pressure of the turbo expander and the evaporation temperature.The experimental results showed that when the evaporation temperature increased from 76 ℃ to 84 ℃,the expander inlet temperature gradually increased.Thus,the expander speed increased by approximately 9.11%,the output power increased by 1.26 kW,and the highest isentropic efficiency was 80.6%.At the same time,the cycle net power,thermal efficiency,irreversible loss,and exergy efficiency increased with the evaporation temperature by 33.9%,26.7%,15.4%,and 27%,respectively.
Based on the premise of recycling the low-temperature waste heat from a 90-150 ℃ source,a test bench was designed for an organic Rankine cycle power generation system,and experimental research was performed.The effects of the evaporating temperature on the expander performance and system performance were investigated by adjusting the inlet pressure of the turbo expander and the evaporation temperature.The experimental results showed that when the evaporation temperature increased from 76 ℃ to 84 ℃,the expander inlet temperature gradually increased.Thus,the expander speed increased by approximately 9.11%,the output power increased by 1.26 kW,and the highest isentropic efficiency was 80.6%.At the same time,the cycle net power,thermal efficiency,irreversible loss,and exergy efficiency increased with the evaporation temperature by 33.9%,26.7%,15.4%,and 27%,respectively.
引文
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[14]魏莉莉.以R142b为工质的有机朗肯循环低温发电系统研究[J].低温工程,2016(4):61-68.(WEI Lili.Experimental study of R142b in low-temperature energy conversion system based on organic Rankine cycle[J].Cryogenics,2016(4):61-68.)
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[16]江龙,GROLL E A.有机朗肯循环的发电系统的实验研究[J].制冷学报,2012,33(1):18-21.(JIANG Long,GROLL E A.Study on organic Rankine cycle and experiment of geothermal power generation[J].Journal of Refrigeration,2012,33(1):18-21.
[2]QUOILIN S,BROEK M V D,DECLAYE S,et al.Techno-economic survey of organic Rankine cycle(ORC)systems[J].Renewable&Sustainable Energy Reviews,2013,22:168-186.
[3]VELEZ F,SEGOVIA J J,MARTIN M C,et al.A technical,economical and market review of organic Rankine cycles for the conversion of low-grade heat for power generation[J].Renewable&Sustainable Energy Reviews,2012,16(6):4175-4189.
[4]BAO Junjiang,ZHAO Li.A review of working fluid and expander selections for organic Rankine cycle[J].Renewable&Sustainable Energy Reviews,2013,24:325-342.
[5]MICHELI D,PINAMONTI P,RRINI M,et al.Performance analysis and working fluid optimization of a cogenerative organic rankine cycle plant[J].Journal of Energy Resource Technology,2013,135(2):021601.
[6]RAYEGAN Y,TAO Y X.A procedure to select working fluids for solar organic Rankine cycles(ORCs)[J].Renewable Energy,2011,36(2):659-670.
[7]MANENTE G,TOFFOLO A,LAZZARETTO A,et al.An organic Rankine cycle off design model for the search of the optimal control strategy[J].Energy,2013,58:97-106.
[8]BAMGBOPA M O,UZGOREN E.Quasi-dynamic model for an organic Rankine cycle[J].Energy Conversion&Management,2013,72:117-124.
[9]LEE Y R,KUO C R,LIU C H,et al.Dynamic response of a 50 k W organic Rankine cycle system in association with evaporators[J].Energies,2014,7(4):2436-2448.
[10]LEE Y R,KUO C R,WANG C C.Transient response of a50 k W organic Rankine cycle system[J].Energy,2012,48(1):532-538.
[11]FU B R,HSU S W,LEE Y R,et al.Effect of off-design heat source temperature on heat transfer characteristics and system performance of a 250-k W organic Rankine cycle system[J].Applied Thermal Engineering,2014,70(1):7-12.
[12]MIAO Zheng,XU Jinliang,YANG Xufei,et al.Operation and performance of a low temperature organic Rankine cycle[J].Applied Thermal Engineering,2015,75:1065-1075.
[13]PERIS B,NAVARRO-ESBRI J,MOLES F,et al.Performance evaluation of an organic Rankine cycle(ORC)for power applications from low grade heat sources[J].Applied Thermal Engineering,2014,75:763-769.
[14]魏莉莉.以R142b为工质的有机朗肯循环低温发电系统研究[J].低温工程,2016(4):61-68.(WEI Lili.Experimental study of R142b in low-temperature energy conversion system based on organic Rankine cycle[J].Cryogenics,2016(4):61-68.)
[15]魏新利,李明辉,马新灵,等.有机朗肯循环系统的实验研究和性能分析[J].郑州大学学报(工学版),2016,37(2):73-76.(WEI Xinli,LI Minghui,MA Xinling,et al.Experimental investigation and performance analysis of organic Rankine cycle system[J].Journal of Zhengzhou University(Engineering Science),2016,37(2):73-76.)
[16]江龙,GROLL E A.有机朗肯循环的发电系统的实验研究[J].制冷学报,2012,33(1):18-21.(JIANG Long,GROLL E A.Study on organic Rankine cycle and experiment of geothermal power generation[J].Journal of Refrigeration,2012,33(1):18-21.