基于火-储联合循环的冷热电三联供系统多运行模式热力性能分析

Considering the features as well as shortages of the coal-fired power plant (CFPP) and the adiabatic compressed air energy storage (CAES) technology, this paper proposes the concept of the CFPP-CAES combined cycle, which integrates these two systems and a new type trigenerative system based on this cycle from the energy conversion and utilization mechanism, evaluates the system performance and analyzes the system characteristics. On the basis of the established thermo-dynamic models, the influence of thermal energy utilization on the important parameters and system performance are separately studied under three operation modes including electric-only, heat-electric and cooling-electric operation modes. The results show that the system round-trip efficiency is increased by 2.61% under the selected optimal integration scheme. Under the heat-electric and cooling-electric operation modes, the round-trip efficiency is further enhanced to 77% and 70.13%. These results indicate that the integration notably improves the energy utilization level, and the performance enhances more for the multiple energies cogeneration scenes. Furthermore, the reasonable way of the heat utilization for different effects under these typical operation modes is obtained via sensitivity analysis. This paper can guide the CFPP-CAES integrated system design and operation, and can provide a new development solution for these two systems.