大型社区LNG分布式多联供系统优化分析

Optimization Analysis of Large-scale Community LNG Distributed Multi-supply System

为改善能源结构,实现“双碳”目标,以10万人口的大型社区为研究对象,对社区的气、冷、热、电负荷进行预测。根据预测结果,使用EBSILON软件建立包括燃气轮机模块、余热利用模块和制冷模块在内的LNG分布式多联供系统,并对系统进行优化,实现LNG冷能利用、烟气余热利用和背压供冷供热。采用净电效率、第一热效率和效率来评价系统的性能,结果表明,设计工况下该系统上述3种效率均优于其他多联供系统。

In an effort to improve the energy structure and achieve carbon peaking and carbon neutrality goals,taking a large-scale community with a population of 100000 as the research object,the loads of gas,cooling,heating and electricity in the community are predicted.Based on the predicted results,the EBSILON software is used to establish the LNG distributed multi-supply system,encompassing modules such as gas turbine,waste heat utilization and refrigeration.Subsequently,the system is optimized to facili-tate the LNG cold energy utilization,flue gas waste heat utilization and back pressure for cooling and heating.The net electricity effi-ciency,the first thermal efficiency and the exergy efficiency are employed to evaluate the performance of the system.The results indi-cate that under design conditions the above three indicators of this system surpass those of other multi-supply systems.