Research on the operation characteristics of a free-piston linear generator: Numerical model and experimental results
Research on the operation characteristics of a free-piston linear generator: Numerical model and experimental results
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DOI：
10.1016/j.enconman.2016.11.010
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发表时间：
2017-01-01
影响因子：
10.4
通讯作者：
Roskilly, Tony
中科院分区：
文献类型：
--
作者：
Guo, Chendong;Feng, Huihua;Roskilly, Tony
自由活塞式直线发电机（FPLG）由于取消了曲轴和连杆机构而显示出独特的运行特性。本文根据仿真和实验结果，研究了其在各个运行过程中的运行特性。在起动过程中，起动过程中电机力越大，满足点火条件的活塞往复运动次数越少。当电机力达到300 N时，样机可以采用一行程起动策略。在中间过程中，发现“逐步切换策略”可以帮助实现中间过程中的平稳操作。中间处理后的操作参数值低于中间处理前。实验结果表明，在产生过程中，活塞上止点和缸内气压都存在循环变化。根据FPLG在发电过程中的实验结果，计算出的发动机指示功率为2.9 kW，相应的指示热效率为37.3%。此外，基于FPLG性能的比较，发现FPLG在发电过程中的参数小于其运行时的参数。在启动过程的第二阶段，而远高于启动过程的第一阶段。(C)2016爱思唯尔有限公司版权所有
Free piston linear generator (FPLG) shows unique operation characteristics due to the elimination of crankshaft and connecting rod mechanism. This paper investigates its operation characteristics during each operating process based on the simulation and experiment results. During the starting process, the larger motor force during the starting process, the fewer times of reciprocating pistons which meet the condition of ignition. When the motor force reached 300 N, the prototype could adopt one-stroke starting strategy. During the intermediate process, it was found that the "gradually switching strategy" could help to achieve a smoother operation during the intermediate process. And the values of the operation parameters after the intermediate process were lower than those before the intermediate process. During the generating process, cycle-to-cycle variations were observed for piston TDC and in-cylinder gas pressure from the experimental results. According to the experimental results of the FPLG during the generating process, the calculated engine indicated power is 2.9 kW, and the corresponding indicated thermal efficiency is 37.3%. Additionally, based on the comparison of the FPLG performance, it is found that the parameters of the FPLG during the generating process are smaller than those when it was operated. during the second stage of the starting process, while much higher than those during the first stage of the starting process. (C) 2016 Elsevier Ltd. All rights reserved.