液化天然气汽车双动力循环系统

Reserch on dual power cycle system of LNG vehicles

在分析液化天然气(LNG)冷能构成的基础上,提出一种由LNG开式朗肯循环和天然气内燃机循环组成的LNG汽车双动力循环系统,并对系统相关参数进行了计算分析。结果表明,该系统不仅可以回收LNG冷量,而且可以利用LNG冷量的做功能力输出动力,系统可用能较普通LNG汽车增加9.82%,充分利用了LNG宝贵的冷能资源,具有较好的节能环保效果。

Based on the analysis of liquefied natural gas （LNG） cryogenic energy composition, a dual power cycle system of LNG vehicles composed of an LNG opening Rankine cycle and a natural gas combustion engine cycle was put forward. The correlative parameters of system were calculated and analyzed. The results showed that the system could recover LNG cryogenic energy and provide power by utilizing LNG cold exergy. Compared with common LNG vehicles, the energy utilized in this system increased by 9.82%. The system recovered and utilized LNG cryogenic energy effectively, the energy conservation and the environmental protection performance effect of the system were obvious.