【作者】 郑江； 厉彦忠； 王春燕；

【Author】 Zheng Jiang;Li Yanzhong;Wang Chunyan;School of Energy and Power Engineering,Xi’an Jiaotong University;State Key Laboratory of Multiphase Flow in Power Engineering;

【机构】 西安交通大学能源与动力工程学院； 动力工程多相流国家重点实验室；

【摘要】 分析了液化天然气(LNG)汽车中燃料液化天然气与发动机排气(EG)的可回收能量,并提出利用温差发电器(TEG)回收冷能和废热。指出了基于冷源所在的低温区,以及LNG与EG之间的大温差这两个特点,TEG的热电转换效率会高于常规。设计了进行能量回收的两种系统流程,计算了其中各状态点的参数,及各换热器中布置温差发电器后的热电转换效率,得到了系统总的回收功率。更多还原

【Abstract】 The cold energy of liquefied natural gas(LNG) and the waste heat of exhaust gas(EG) in LNG vehicles are analyzed in this paper.Thermoelectric generator(TEG) is suggested in recovering the cold energy and the waste heat.The TEGs here get higher efficiencies than conventional ones,for they work with heat sinks at cryogenic temperatures and there are large temperature differences between LNG and EG.Two recovery systems for the LNG vehicles were proposed and the correlative parameters of systems were calculated and analyzed.The generation efficiencies of TEGs are calculated.The recovery power of each systems is analyzed.更多还原