Experimental and simulation study of a free piston expander-linear generator for small-scale organic Rankine cycle
Experimental and simulation study of a free piston expander-linear generator for small-scale organic Rankine cycle
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小型有机朗肯循环自由活塞膨胀机-线性发电机实验与仿真研究
DOI：
10.1016/j.energy.2018.07.171
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发表时间：
2018
期刊：
影响因子：
9
通讯作者：
Zhao Tenglong
中科院分区：
文献类型：
--
作者：
Xu Yonghong;Tong Liang;Zhang Hongguang;Hou Xiaochen;Yang Fubin;Yu Fei;Yang Yuxin;Liu Rong;Tian Yaming;Zhao Tenglong
介绍了一种适用于小型有机朗肯循环（ORC）余热回收系统的自由活塞膨胀线性发生器（FPE-LG）。研制了FPE-LG实验试验台，并利用Matlab/Simulink建立了仿真模型。在实验的基础上讨论了其运动特性和输出性能，并对仿真模型进行了验证。在较高的进气压力和工作频率下，进一步研究了FPE-LG的运动特性和输出性能。结果表明，进气压力和工作频率对发动机的运动特性和输出性能有显著影响。自由活塞总成的速度和位移随进气压力的增大而增大，峰值输出功率随工作频率的增加先增大后减小。进气压力为10 bar，外部负载电阻为90 Hz，工作频率为15 Hz时，输出功率峰值为676 W。利用仿真模型研究FPE-LG的工作参数是方便的，该模型可以为FPE-LG的设计和优化提供参考。(C) 2018 Elsevier Ltd.版权所有。
This paper presents a new free piston expander linear generator (FPE-LG) for small-scale organic Rankine cycle (ORC) waste heat recovery systems. An FPE-LG experimental test rig is developed, and a simulation model is established with Matlab/Simulink. Motion characteristics and output performance are discussed based on experimental results, and the simulation model is validated. Further investigation of the motion characteristics and output performance of FPE-LG is conducted at a relatively high intake pressure and operating frequency. Results show that intake pressure and operating frequency significantly affect motion characteristics and output performance. The velocity and displacement of the free piston assembly increase with increasing intake pressure, and the peak power output initially increases then decreases with increasing operating frequency. The peak power output is 676 W when the intake pressure, external load resistance, and operating frequency are 10 bar, 90, and 15 Hz, respectively. Using the simulation model to study FPE-LG operating parameters is convenient, and the model can serve as a reference for the future design and optimization of FPE-LG. (C) 2018 Elsevier Ltd. All rights reserved.