汽油机余热回收单阀膨胀机模拟试验
发布时间：2018-12-14 03:37
【摘要】：发动机尾气能量占燃料燃烧放热总量的35%左右,为回收这部分能量,针对以水为工质的单阀膨胀机的工作特点,建立基于Matlab/Simulink的单阀膨胀机模型.分析该模型的性能,并进行试验验证模型的正确性.模拟结果表明,进气压力和进气阀升程的增加会导致单阀膨胀机输出功率和质量流量的增大,同时导致膨胀机效率的降低.随着转速的增大,膨胀机输出功率和质量流量先增大后趋于平稳;进气温度升高会导致质量流量的下降,对膨胀机输出功率和效率的影响不大.膨胀机试验结果表明,当汽油机功率为61kW时,膨胀机回收的功率可达3kW,使联合循环系统总输出功率增加5%.
[Abstract]:The exhaust energy of engine accounts for about 35% of the total heat release of fuel combustion. In order to recover this part of energy, the model of single valve expander based on Matlab/Simulink is established according to the working characteristics of single valve expander with water as its working medium. The performance of the model is analyzed and the correctness of the model is verified by experiments. The simulation results show that the increase of inlet pressure and intake valve lift will increase the output power and mass flow rate of single valve expander and decrease the efficiency of expander. With the increase of rotational speed, the output power and mass flow rate of the expander first increase and then tend to steady, and the increase of inlet air temperature will lead to the decrease of mass flow rate, which has little effect on the output power and efficiency of the expander. The results of expander test show that when the power of gasoline engine is 61kW, the power recovered by the expander can reach 3 kW, which increases the total output power of the combined cycle system by 5 kW.
【作者单位】： 天津大学内燃机燃烧学国家重点实验室;大连海洋大学机械与动力工程学院;
【基金】：国家“973”重点基础研究发展规划资助项目
【分类号】：TK115
，
本文编号：2377844
[Abstract]:The exhaust energy of engine accounts for about 35% of the total heat release of fuel combustion. In order to recover this part of energy, the model of single valve expander based on Matlab/Simulink is established according to the working characteristics of single valve expander with water as its working medium. The performance of the model is analyzed and the correctness of the model is verified by experiments. The simulation results show that the increase of inlet pressure and intake valve lift will increase the output power and mass flow rate of single valve expander and decrease the efficiency of expander. With the increase of rotational speed, the output power and mass flow rate of the expander first increase and then tend to steady, and the increase of inlet air temperature will lead to the decrease of mass flow rate, which has little effect on the output power and efficiency of the expander. The results of expander test show that when the power of gasoline engine is 61kW, the power recovered by the expander can reach 3 kW, which increases the total output power of the combined cycle system by 5 kW.
【作者单位】： 天津大学内燃机燃烧学国家重点实验室;大连海洋大学机械与动力工程学院;
【基金】：国家“973”重点基础研究发展规划资助项目
【分类号】：TK115
，
本文编号：2377844
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