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提出一种新型分布式功冷联产系统,有机整合了小型燃气轮机、氨水蒸汽动力装置和吸收式制冷装置。燃机排烟的高温热量用于驱动氨水蒸汽动力装置做功,烟气低温热量和氨水透平排汽热量用于驱动吸收式制冷装置,实现了烟气余热的梯级利用。模拟结果表明,新系统的等效发电效率和(火用)效率分别为45.3%和35.5%,比参比系统分别高出7.5和8.6个百分点。系统(火用)分析和参数敏感性分析表明,燃机排烟余热的梯级利用是系统性能提高的主要原因。新系统为提高分布式供能系统的总体性能提供了一种新方法。
A new type of distributed cogeneration system was proposed, which integrated the small gas turbine, ammonia steam power plant and absorption refrigeration unit. The high temperature heat of the exhaust gas of the combustion engine is used to drive the ammonia steam power plant, the low temperature heat of the flue gas and the exhaust heat of the ammonia turbine are used to drive the absorption refrigeration device, and the cascade utilization of the waste heat of the flue gas is realized. The simulation results show that the equivalent power generation efficiency and exergy efficiency of the new system are 45.3% and 35.5%, respectively, which are 7.5 and 8.6 percentage points higher than that of the reference system respectively. The exergy analysis and parameter sensitivity analysis show that the cascade utilization of waste heat from the exhaust gas of the combustion engine is the main reason for the improvement of system performance. The new system provides a new way to improve the overall performance of distributed energy systems.