太阳能与压缩空气耦合储能的燃气轮机CCHP系统特性

Performances of Gas Turbine-Based CCHP System Combined With Solar and Compressed Air Energy Storage

针对燃气轮机冷热电联产系统在"以热定电"运行方式下可能造成的电能过剩和部分负荷时效率不高等问题,该文提出一种太阳能与压缩空气耦合储能(solar andcompressed air energy storage,S-CAES)的燃气轮机冷热电联产系统。通过燃气轮机冷热电联产系统典型变工况模型和储能系统的Aspen Plus分析模型,获得S-CAES燃气轮机冷热电联产系统的变工况特性;讨论了各子系统的变工况特性和耦合系统在不同储能率下的运行性能,比较了储能系统释气流量调节与空气透平入口温度调节两种调节方式对系统性能的影响。将S-CAES燃气轮机冷热电联产系统用于华南地区某宾馆建筑进行案例分析,结果表明:与无储能燃气轮机冷热电联产系统相比,在夏季、过渡季、冬季典型日,该系统每天分别节约能量16.57、15.94、11.87GJ;平均能量利用率分别提高5.68%、7.88%和4.69%。

In gas turbine based combined cooling, heating and power （CCHP） system, the operation mode of following thermal load often causes electric power surplus and efficiency decrease at part load. In this paper, we proposed a gas turbine based CCHP system combined with solar and compressed air energy storage （S-CAES）. To obtain the off-design characteristics of this system and each subsystem, the typical off-design model of CCHP and Aspen Plus models of S-CAES were built. This paper also analyzed the operation characteristics of this system in different energy storage rates, and compared the effects of two different operation modes between adjust air reservoir discharge flow and adjust air turbine inlet temperature on the system. Finally, this kind of system was applied to a hotel building of South China as a case study. Results show that compared with gas turbine based CCHP system without energy storage, the energy consumption can be reduced by 16.57, 15.94, 11.87GJ and the primary energy ratio will increase by 5.68, 7.88 and 4.69 percentage points for the typical day of summer, transition season and winter, respectively.