LNG冷能发电方式及其比较分析

Comparative Analysis of LNG Cold Energy Power Generation

随着我国LNG产业的快速发展,冷能发电成为有效利用LNG气化冷能的关键技术之一。探讨了我国LNG冷能发电产业的发展方向和技术路径,详细论述了LNG特性、冷能发电方式和技术路线选择等三个方面,总结了有机朗肯类循环发电方式的优缺点,计算给出实例分析和对比。总体上,LNG因产地、运输、排气压力等因素,可利用的冷能有显著差异。直接膨胀发电和单组分中间介质发电技术最成熟,但混合组分中间介质效率更高。混合工质技术路线将是我国未来发展最可行的技术路线。

With the rapid development of China's LNG industry,cold energy power generation has become one of the key techniques for effective cold energy utilization from LNG gasification.In order to discuss the development direction and technical route of China's LNG cold energy power generation industry,the three aspects of LNG characteristics including cold energy power generation mode and technical route selection are discussed in detail.The advantages and disadvantages of organic Rankine cycle power generation mode are summarized,and the case analysis and comparison calculations are given.In general,there are significant differences in the available cold energy due to factors such as the origin,transportation,and exhaust gas pressure of LNG.Direct expansion approach and single-component intermediate for electricity production is the most mature,but mixed components are more effective.The technical route of mixed working fluid will be the most feasible technical route for the future development of China.