摘要
目前 ,用作汽车燃料的天然气大多是以压缩天然气 (CNG)的形式存储的 ,而且车用系统发展也较为成熟。CNG是将天然气在常态下压缩并存储在 2 0MPa以上的高压罐内 ,因而储罐体积较大 ,强度、安全性要求高 ,增加车辆自重 ,一次行驶里程短 ,且充气时间较长 ,这在很大程度上制约了天然气汽车的发展。从实用效果上看 ,液化天然气 (LNG)占用体积小、能量存储密度大、燃烧性能好、热值高、一次充灌行驶里程长 ,较之CNG更适合用作汽车燃料。此外 ,存储在 1 1 0K低温下的LNG ,具有大量的冷能 ,将该冷能回收用于汽车空调或低温冷藏车的冷藏运输过程 。
Currently,natural gas used as vehicle fuel is mainly stored in the shape of compressed natural gas (CNG) and t he vehicle system development is relatively perfect.CNG is making the natural ga s in normality be compressed and stored in a high pressure (over 20 MPa) tank,t herefore the tank is of a large volume,high demands on strength and safety,heav y load,short running mileage for once filling and long gas filling time,thus res tricting the expansion of gas vehicles to a great extent.According to the applie d results it is indicated that liquefied natural gas (LNG) has some advantages a s small volume,large energy storage intensity,good burning performance,high ther mal value and long running mileage for once filling,so that LNG is more suitable for being used as vehichle fuel than CNG.Moreover,LNG stored in cryogenic situa tion of 110 K has a great deal of cold energy and it is of double signification of energy saving and environmental protection if the cold energy reclaimed is u sed for vehicle air condition and cold transportation in cold storage chain.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2002年第5期93-96,共4页
Natural Gas Industry
基金
教育部高等学校骨干教师基金资助项目
关键词
LNG
汽车工业
液化天然气
发动机燃料
燃料能
燃烧热
安全系数
能量回收
环境保护
Liquefied natural gas,Automobile,Mo tor fuel,Fuel energy,Heat of combustion,Safety factor,Energy recovery,Environmen tal protection
