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一种基于内燃机余热回收的冷电联供系统 被引量:4

Performance Analysis of a Combined Cooling and Power(CCP) System Based on Waste Heat Recovery of Internal Combustion Engine
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摘要 本文建立一种基于内燃机余热利用的冷电联供系统,构建了热力学数学模型,研究了关键热力参数对联供系统热力性能的影响。结果表明:布雷顿循环透平膨胀压比的降低、压气机进口温度的降低及透平进口温度的增加,均有利于系统热力性能的提升;有机朗肯循环透平进口压力的增加能使得系统的电能输出及总效率增加;喷射式制冷循环喷射器进口工作蒸气压力增加能提高制冷量及制冷效率。为了获得联供系统的最佳设计参数和性能,采用遗传算法,对系统进行单目标优化,得出此联供系统最大效率能达到54.22%,此时电能输出为31.58 kW,制冷量输出为3.15 kW,系统能较好地回收内燃机余热。 In this paper,a combined cooling and power system(CCP) is carried out based on the waste heat recovery of internal combustion engine.Mathematical model is established and the effect of key parameters on thermodynamic performance is conducted.Results show that the decrease of expansion ratio and compressor inlet temperature in Brayton Cycle,the increase of turbine inlet temperature in Organic Rankine Cycle have positive effect on thermodynamic performance.The electrical power output and exergy efficiency increase with the rise of the turbine inlet pressure in Organic Rankine Cycle.The cooling capacity and cooling exergy both increase with the increase of ejector inlet pressure.In order to obtain the optimal design parameters and thermodynamic performance of the system,single-objective optimization is conducted by genetic algorithm.The conclusions reveal that a maximum exergy efficiency of 54.22%can be achieved,and the electrical power output and the cooling capacity are 31.58 kW and 3.15 kW,respectively.Then the waste heat of internal combustion engine could be efficiently recovered.
作者 夏家曦 王红阳 王江峰 赵攀 戴义平 XIA Jia-Xi WANG Hong-Yang WANG Jiang-Feng ZHAO Pan DAI Yi-Ping (Institute of Turbomachinery, Xi'an Jiaotong University, Xi'an 710049, China)
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2017年第2期235-241,共7页 Journal of Engineering Thermophysics
基金 国家自然科学基金面上项目(No.51476121)
关键词 内燃机 余热回收 冷电联供 热力性能 单目标优化 internal combustion engine waste heat recovery combined cooling and power system thermodynamic performance single-objective optimization
作者简介 夏家曦(1990-),男,博士研究生,主要从事中低温余热发电技术的研究。 通信作者:王江峰,副教授,E-mail:jfwang@mail.xjtu.edu.cn
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