TY - JOUR
T1 - Experimental study on the power generation characteristics of a free piston engine generator prototype with dual linear generator modules
AU - Li, Jian
AU - Zuo, Zhengxing
AU - Jia, Boru
AU - Wei, Yidi
AU - Ma, Yuguo
AU - Xu, Lei
AU - Wang, Jiayu
AU - Zhang, Zhiyuan
AU - Feng, Huihua
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/10/30
Y1 - 2024/10/30
N2 - The dual-piston dual-cylinder free piston engine generator (DD-FPEG) has garnered significant attention for its high thermal efficiency, power density, and suitability for various fuels. To improve performance and stability, this paper proposes a DD-FPEG prototype integrating dual linear generator (LG) modules. The structure and working process of the prototype is introduced, followed by testing its operating characteristics and power generation performance from the cold start to power generation process. When LG1 operates in motor mode, and LG2 operates in generation mode with no load, the motor thrust must exceed 126 N to ensure piston movement. As the motor thrust decreases from 221 N to 0 N and then switches to generation mode, the peak cylinder pressure, operating frequency, output voltage and power show a decreasing trend. The coefficients of variation for peak cylinder pressure position, top and bottom dead center positions are lower than that of peak cylinder pressure, and their values are below 3 %. When the load is 50 Ω, the prototype operates at about 31.2 Hz, with an average indicated power of 1422.8 W and a peak output power of about 1002.5 W. These results demonstrate that the proposed control strategy enables the designed prototype to achieve stable operation and smooth switching.
AB - The dual-piston dual-cylinder free piston engine generator (DD-FPEG) has garnered significant attention for its high thermal efficiency, power density, and suitability for various fuels. To improve performance and stability, this paper proposes a DD-FPEG prototype integrating dual linear generator (LG) modules. The structure and working process of the prototype is introduced, followed by testing its operating characteristics and power generation performance from the cold start to power generation process. When LG1 operates in motor mode, and LG2 operates in generation mode with no load, the motor thrust must exceed 126 N to ensure piston movement. As the motor thrust decreases from 221 N to 0 N and then switches to generation mode, the peak cylinder pressure, operating frequency, output voltage and power show a decreasing trend. The coefficients of variation for peak cylinder pressure position, top and bottom dead center positions are lower than that of peak cylinder pressure, and their values are below 3 %. When the load is 50 Ω, the prototype operates at about 31.2 Hz, with an average indicated power of 1422.8 W and a peak output power of about 1002.5 W. These results demonstrate that the proposed control strategy enables the designed prototype to achieve stable operation and smooth switching.
KW - Coefficient of variation
KW - Cold start process
KW - Free piston engine
KW - Linear generator
KW - Power generation performance
UR - http://www.scopus.com/inward/record.url?scp=85200233401&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2024.132704
DO - 10.1016/j.energy.2024.132704
M3 - Article
AN - SCOPUS:85200233401
SN - 0360-5442
VL - 307
JO - Energy
JF - Energy
M1 - 132704
ER -