推荐回答(3个)
LNG汽车的气瓶(即保温罐)里的温度随着慢慢升高,就会导致里面的天然气液体超过-162摄氏度的沸点值从而出现升腾气化的现象。据资料显示,不同厂家的LNG气瓶根据容积的大小,一般情况每天的升腾蒸发量约为3-5%。
常见的LNG气瓶的主要结构是双层真空结构,主要由内胆、外壳、绝热结构、支撑系统和刚性组件等组成。其中内胆的作用是存放LNG的容器,在内胆的内部还有有加注喷淋管、液位探头等部件。外壳保护内胆并对整个瓶体起支撑作用,在外壳和内胆之间是密闭的隔温层,采用高真空多层绝热,又称超级绝热。

lng气瓶使用注意事项
为确保车辆正常运行,应定期对燃料系统进行检漏,如果发现泄漏点应立即进行维修。有条件可用便携式甲烷探测器对燃气系统天然气泄漏点进行检查。无条件时,可以用肥皂液检查漏点。
如果燃料瓶为热瓶,充装时过充的话,压力也会快速升高当燃料瓶完全失去真空后,会按每分钟0.007MPa的速度产生压力,所以这很容易检测。外容器尤其是靠管线或支撑比较近的,比周围的金属要冷。
先看看是不是增压阀一直在开启
可以先关闭增压阀
如果还是压力高那就是夹层真空度不行了
导致密封性不好
使得气瓶内的温度与环境温度越来越接近
加速气化压力升高
这样的话就要进行抽真空处理了
一般压力过高
超过工作压力的1.2倍
一级安全阀就会起跳
开始向外排气
直到压力下降到工作压力的1.2倍以下时才会停止
如果一级安全阀排气是
压力还是过高
或者继续在上升
那么二级安全阀就会开始工作了
二级安全阀的设计是工作压力的1.8倍
再如果二级安全阀排气的时候压力还是高
那就只能靠人工手动
放气
就是打开放空阀
让气从那里
排出去
直到压力表的数值开始下降
一般的LNG车用气瓶的工作压力是1.59MPA
一般压力过高
超过工作压力的1.2倍
一级安全阀就会起跳
开始向外排气
直到压力下降到工作压力的1.2倍以下时才会停止
如果一级安全阀排气是
压力还是过高
或者继续在上升
那么二级安全阀就会开始工作了
二级安全阀的设计是工作压力的1.8倍
再如果二级安全阀排气的时候压力还是高
那就只能靠人工手动
放气
就是打开放空阀
让气从那里
排出去
直到压力表的数值开始下降
一般的lng车用气瓶的工作压力是1.59mpa
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