Design, modelling and validation of a linear Joule Engine generator designed for renewable energy sources
Design, modelling and validation of a linear Joule Engine generator designed for renewable energy sources
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DOI：
10.1016/j.enconman.2018.03.050
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发表时间：
2018-06
影响因子：
10.4
通讯作者：
Boru Jia;Dawei Wu;A. Smallbone;C. Lawrence;A. Roskilly
中科院分区：
文献类型：
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作者：
Boru Jia;Dawei Wu;A. Smallbone;C. Lawrence;A. Roskilly
线性焦耳发动机发电机（LJEG）融合了焦耳发动机技术和永磁线性交流发电机设计，是一种很有前途的发电装置，适用于电动汽车增程器、热电联产（CHP）系统或作为独立动力装置的应用。它结合了焦耳发动机和线性发电机的优点，即效率高、尺寸紧凑、可灵活地与可再生能源集成等。本文总结了LJEG的背景和最新发展。描述了详细的零维数值模型，用于评估系统动力学和热力学特性。使用从往复式焦耳发动机和 LJEG 原型获得的测试数据进行模型验证，结果与仿真结果非常吻合。然后使用经过验证的数值模型解释了系统的基本运行特征。发现活塞位移曲线与振幅为51.0mm、频率为13Hz的正弦波函数有一定的相似性。线性发电机的电力输出可达4.4 kWe。发动机热效率可达34%以上，发电效率达30%。
The Linear Joule Engine Generator (LJEG) incorporates the Joule Engine technology and the permanent magnet linear alternator design, which is a promising power generation device for the applications of range extenders for electric vehicles, Combined Heat and Power (CHP) systems, or as a stand-alone power unit. It combines the advantages from both a Joule Engine and a linear alternator,i.e.high efficiency, compact in size, and flexible to renewable energy integration, etc. In this paper, the background and recent developments of the LJEGs are summarised. A detailed 0-dimentional numerical model is described for the evaluation of the system dynamics and thermodynamic characteristics. Model validation is conducted using the test data obtained from both a reciprocating Joule Engine and a LJEG prototype, which proved to be in good agreement with the simulation results. The fundamental operational characteristics of the system were then explained using the validated numerical model. It was found that the piston displacement profile has certain similarity with a sinusoidal wave function with an amplitude of 51.0 mm and a frequency of 13 Hz. The electric power output from the linear alternator can reach 4.4 kWe. The engine thermal efficiency can reach above 34%, with an electric generating efficiency of 30%.