潜热利用式复合有机朗肯循环余热回收系统构建及优化-partB
Parameter analysis of waste heat recovery system of latent heat utilization compound organic Rankine cycle-partB
在partA研究基础上进一步探究工作参数变化对系统性能的影响,研究得出较高的高温循环蒸发压力和较低的高温循环冷凝压力可以提高系统余热回收效率;低温工质与冷却液的换热器、低温循环冷凝器、集成式蒸发/冷凝器和低温循环膨胀机的㶲损占比较高,可以作为优化的目标过程。在重型柴油机某工况下以系统净输出功率、系统㶲效率和㶲损为目标对象,按照对低温循环蒸发压力进行分段的加热策略,探究循环中关键工作参数的影响。结果表明,系统的输出功率、㶲效率和㶲损最佳可以达到 25.57kW、49.42%和 26.17kW;研究完成了工作参数对潜热利用式复合有机朗肯循环系统的影响规律分析,可以为系统运行提供指导。
Based on the partA study,we further investigate the effect of the change of operating parameters on the system performance,and conclude that higher high-temperature cycle evaporation pressure and lower high-temperature cycle condensing pressure can improve the system waste heat recovery efficiency;the heat exchanger of low-temperature working mass and coolant,low-temperature cycle condenser,integrated evaporator/condenser,and low-temperature cycle expander have a higher percentage of heat loss,which can be used as the target process for optimization.The net output power of the system,the system radiation efficiency and the radiation loss are used as target objects in a certain operating condition of a heavy-duty diesel engine,and the influence of key operating parameters in the cycle is explored according to a heating strategy that segments the evaporative pressure of the low-temperature cycle.The results show that the output power,efficiency and loss of the system can reach 25.57kW,49.42%and 26.17kW;the study completes the analysis of the influence law of the working parameters on the latent heat utilization type compound organic Rankine cycle system,which can provide guidance for the system operation.
程兆辉;马悦;韩永强;王昕平;金华玉;王鹏;虞浏;
吉林大学 能源与动力工程系,长春 130000;吉林大学 能源与动力工程系,长春 130000;吉林大学 能源与动力工程系,长春 130000;吉林大学 能源与动力工程系,长春 130000;一汽解放商用车开发院,长春,130000;一汽解放商用车开发院,长春,130000;一汽解放商用车开发院,长春,130000;
TK411+.5
waste heat recovery organic Rankine cycle latent heat utilization dual loop coupled heat transfer
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