天然气与电力长距离联合高效输送的可行性研究  

Efficient Long-Distance Energy Transmission Conception

作　　者：张杨[1] 厉彦忠[1] 谭宏博[1] 李广鹏[1] 刘展[1] 王春燕[1] 

机构地区：[1]西安交通大学制冷及低温工程系,西安710049

出　　处：《西安交通大学学报》2013年第9期1-7,共7页Journal of Xi'an Jiaotong University

基　　金：陕西省2012年自然科学基础研究计划资助项目(2012JQ7028);中央高校基本科研业务费专项资金资助项目

摘　　要：为提高长距离能源输送效率,提出了一种新型联合输送模式。电力采用超导电缆输送,而液化天然气作为高温超导电缆的冷却工质,使得天然气输送和电力输送"同路"进行。初步设计了电缆与管路结构,建立了液化天然气输送模型,分析了影响能耗的相关因素。新型联合系统的效率与系统输送比成正比,与绝热结构的导热系数成反比。计算结果表明,联合输送系统的损耗率仅为传统输送系统的1/3,其能源输送效率高达96%。同时,由管道漏热引入的功耗占冷泵站总功耗的85.1%。与传统模式相比,新型输送模式的效率高,节能效果显著。然而,管道漏热是最主要的功耗因素,更优良的长距离低温管道绝热技术可以显著降低联合输送系统的功耗。A novel consortium model was proposed to improve the efficiency of long-distance energy transmission. In the present model, the liquefied natural gas （LNG） is used as the coolant for the high temperature superconducting power cable （HTSPC）, and then both the electrical power and the liquefied natural gas are transmitted. A new structure of the power cable was designed and the effects of the parameters on the energy cost were examined on the basis of the transmission model of LNG established. The results show that the efficiency of the system increases with an increase in the transporting ratio and a decrease in the thermal conductivity of the insulation structure. The efficiency of the new system will reach up to 96% and the system loss rate is only 1/3 that of the conventional system. Moreover, the heat leakage of the cryogenic pipelines is the most important factor of the power consumption, resulting in 85.1% the total power consumption at the cryogenic pump station. It appears that the more efficient thermal insulation for the pipelines can significantly reduce the power consumption of the system.

关 键 词：长距离输送 高效 液化天然气 高温超导 

分 类 号：TE832[石油与天然气工程—油气储运工程]