Analysis on operation characteristic and output performance of free piston expander-linear generator based on displacement control strategy - 文章详情页

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In　this　paper,　a　free　piston　expander-linear　generator　(FPE-LG)　test　rig　is　established　and　the　control　strategy　based　on　displacement　is　applied.　The　operation　characteristic,　output　performance,　and　energy　conversion　efficiency　of　the　FPE-LG　are　analyzed.　The　coefficient　of　equilibrium　oscillation　(C)　is　identified　to　evaluate　the　stability　of　the　free　piston　assembly　(FPA).　Experimental　results　show　that　the　FPA　has　best　stability　when　fixed　position　point　(FPP)　is　between　20　-　75　mm.　The　actual　stroke　and　operation　frequency　increase　with　the　intake　pressure　and　load　resistance.　The　variations　of　voltage　and　power　output　are　in　accordance　with　velocity.　The　average　power　output　increases　with　intake　pressure　and　FPP,　but　reduces　with　the　advanced　exhaust　duration.　The　maximum　average　power　output　can　be　achieved　when　the　load　resistance　is　20　Ω.　The　energy　conversion　efficiency　first　increases　with　intake　pressure　and　then　remains　constant.　The　energy　conversion　efficiency　reaches　up　to　17.5　%　when　intake　pressure　is　0.9　MPa,　FPP　is　40　-　55　mm,　advanced　exhaust　duration　is　0　ms,　and　load　resistance　is　20　Ω.　The　lower　the　coefficient　of　equilibrium　oscillation　is,　the　higher　the　average　power　output　is.　©　2020　Elsevier　Ltd

关键词：

Electric generators Pistons Conversion efficiency Thermoelectric power Displacement control

作者机构：

[ 1 ] [Shi, Xin]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Hou, Xiaochen]Department of Energy and Power Engineering, Shandong University of Technology, Zibo; 255000, China
[ 3 ] [Yang, Fubin]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Yang, Fubin]Key Laboratory for Thermal Science and Power Engineering of MOE, Beijing Key Laboratory for CO2 Utilization and Reduction Technology, Tsinghua University, Beijing; 100084, China
[ 5 ] [Zhang, Hongguang]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Shi, Zhicheng]School of Mechanical Engineering, Beijing Institute of Technology, Beijing; 100081, China
[ 7 ] [Zhao, Tenglong]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
[ 8 ] [Guan, Xinyue]School of Arts & Communication, Beijing Normal University, Beijing; 100875, China
[ 9 ] [Wu, Yuting]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
[ 10 ] [Zhang, Jian]Mechanical Engineering Richard J. Resch School of Engineering, University of Wisconsin Green Bay, WI; 54311, United States

通讯作者信息：

[hou, xiaochen]department of energy and power engineering, shandong university of technology, zibo; 255000, china

电子邮件地址：

houxiaochenlove@126.com

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