为提高压缩空气储能系统的效率，提出了一种新型耦合系统：将压缩空气储能系统与电解水制氢系统和氢能固体燃料电池系统进行系统集成。在充电过程中，电解水制氢系统和压缩空气储能系统分别将电能存储。在放电过程中，采用氢能固体燃料电池和压缩空气储能系统进行发电。采用压缩空气储能系统排出的空气余热以及剩余的压缩热加热氢能固体燃料电池系统的给水，从而增加系统电能输出。通过以上系统集成，实现了能量梯级利用，有效提高了压缩空气储能系统的效率；同时与氢能系统集成，实现了整个过程碳零排放。对耦合系统进行了热力学分析和经济性分析，结果表明，压缩空气储能系统的往返效率、储能密度和GFDA3效率可达70.05%、12.01 MJ/m³和66.39%；同时，耦合系统的整体效率可提高1.19%。压缩空气储能系统的动态投资回收期为3.36 a，净现值可以达到1 458.01万元，具有较好的经济收益。

To improve the efficiency of the compressed air energy storage (CAES) system, a new coupling system is proposed, in which CAES system is integrated with the electrolytic water hydrogen production system and the hydrogen-driven solid fuel cell system.During the charging process, the electrolytic water hydrogen production system and CAES system separately store electrical energy.During the discharging process, the hydrogen-driven solid fuel cell system and CAES system are used to generate electricity.In addition, both the spare heat in the air discharged from CAES system and the remaining compression heat are used to heat the feedwater for the hydrogen-driven solid fuel cell system, thus increasing the electrical energy output from the system.Through such system integration, the ladder utilization of energy is realized and the efficiency of CAES system is effectively improved.Meanwhile, the integration of the hydrogen energy system achieves zero carbon emission in the whole process.It is indicated through analyzing the thermodynamic property and economy of the coupled system that the round-trip efficiency, energy storage density and exergy efficiency of the CAES system can reach 70.05%, 12.01 MJ·m^-3 and 66.39%, respectively.Meanwhile, the overall efficiency of the coupled system can rise by 1.19 percentage points.In addition, the dynamic payback period of the CAES system is 3.36 years, and the net present value can reach RMB 14.581 million, showing a good economic return.

张利(1975-),男,本科,高级工程师,主要从事清洁能源利用工作,ysgdzhl@163.com。