基于液化空气储能的综合能源系统经济性分析

Economic analysis of integrated energy system based on liquid air energy storage

以园区为研究背景,基于“以热定电”、“以电定热”两种模式,对园区内的综合能源系统进行研究。针对夏季、冬季两个典型日设计了八种方案来对比系统配置液化空气储能与未配置液化空气储能时各子系统输出功率及总成本的变化。结果表明,在园区配置液化空气储能,采用“以热定电”模式运行时经济效益最高且能源损耗量最少。在大暑日,其总成本比未配置液化空气储能的系统降低6.1%。在大寒日,其总成本比未配置液化空气储能的系统总成本降低4.5%。同样配置液化空气储能的情况下,采用“以热定电”模式运行的系统要比“以电定热”模式总成本低。在大暑日总成本降低9.5%,在大寒日,总成本降低4.5%。

The integrated energy system is studied with the park as the backdrop,based on the two modes of“ordering power by heat”and“ordering heat by power.”This paper develops eight schemes to compare changes in output power of each subsystem and total cost when the system is configured with and without liquid-air energy storage using two typical summer and winter days as examples.When operating in the“ordering power by heat”mode,the results show that when liquid-air energy storage is configured in the park,the economic benefit is the greatest and the smallest energy loss.On Great Heat Day,the total cost is 6.1%less than the system without liquid-air energy storage.On a Great Cold Day,the total cost is 4.5%less than the system without liquid-air energy storage.Furthermore,the system’s total cost operating in“ordering power by heat”is lower than that in the mode of“ordering heat by power”when the system is equipped with liquid-air energy storage.On Great Heat Day,the total cost is reduced by 9.5%,and on Great Cold Day,the total cost is reduced by 4.5%.