Dynamic performance research of a free piston expander-linear generator - 文章详情页

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To　improve　the　thermal　conversion　efficiency　of　the　expander　applied　in　the　organic　Rankine　cycle　for　recovering　low-grade　waste　heat　from　internal　combustion　engine,　the　performance　of　a　free　piston　expander-linear　generator　was　studied　by　experiments　and　simulations　in　the　air　test　rig.　A　simulation　model　built　by　MATLAB/Simulink　software　was　verified　by　experiments,　and　the　influence　of　the　initial　displacement　of　the　piston,　the　piston-mover　mass　and　working　frequency　on　the　dynamic　characteristics　was　studied.　The　results　show　that　there　is　only　one　point　(-0.045307　m)　that　enables　the　piston　to　do　reciprocating　motion　near　the　displacement　of　0　point　when　inlet　pressure　and　working　frequency　are　0.188　MPa　and　2.5　Hz,　respectively.　Stroke　length,　peak　velocity,　peak　acceleration　and　indicated　work　of　the　piston　decrease　with　the　piston-mover　mass　increasing.　To　protect　the　system　of　free　piston　expander-linear　generator　from　damage,　the　frequency　can　not　be　too　low,　otherwise　the　piston　will　hit　the　cylinder.　©　2016,　Beijing　University　of　Technology.　All　right　reserved.

关键词：

Dynamic characteristic; Free piston expander; Linear generator; Waste heat recovery

作者机构：

[ 1 ] [Zhang, H.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Zhang, H.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 3 ] [Chang, Y.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Chang, Y.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 5 ] [Li, G.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Li, G.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 7 ] [Yang, F.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 8 ] [Yang, F.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 9 ] [Song, S.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 10 ] [Song, S.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 11 ] [Zhao, G.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 12 ] [Zhao, G.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 13 ] [Wang, H.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 14 ] [Wang, H.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China
[ 15 ] [Bei, C.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 16 ] [Bei, C.]Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100124, China

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