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液化天然气槽车是LNG陆地输送的重要工具，而将高真空多层绝热方式应用于LNG槽车在国内尚属首次。介绍了高真空多层绝热的原理，并与真空粉末绝热等其他绝热形式进行了分析比较，指出高真空多层绝热是一种超级绝热方式，具有导热系数低、绝热空间小、有效质量轻等特点，很适合低温运输容器的绝热。还介绍了LNG槽车运输贮槽的绝热材料选择、绝热结构设计及日蒸发率计算等，并以40 m3 LNG运输槽车为例，对无损贮存时间进行了计算。结果显示，40 m3 LNG运输贮槽的日蒸发率小于0.3% ，无损贮存时间可达20天。

Design of Thermal Insulation for LNG Tanker

The LNG tanker is very important tool for LNG transportation on land. It is the first time in China for LNG tanker to use the high vacuum multi-layer thermal insulation. The article introduces the principle of high vacuum multi-layer thermal insulation, and compares the high vacuum multi-layer thermal insulation with the other insulation, such as vacuum powder insulation, etc. The article points out that the high vacuum multi-layer thermal insulation is a super-insulting way, which has the characteristics of small thermal conductivity, small volume, and light quality, etc. It is very suitable for insulation of the transporting tankers with low temperature. Also, the article introduces how to choice thermal insulating materials, how to design the thermal structure, and how to calculate the daily evaporation rate. Taking a 40 m3 LNG tanker as an example, the non-loss storage time is calculated. The results show the daily evaporation rate of the 40 m3 LNG tanker is less than 0.3%, and the non-loss storage time can reach to 20 days.