【摘要】 提出了一种耦合液化天然气压力能的新型冷-热-电联供（CCHP,combined cooling, heating and power）系统.以西安某工业园为研究对象，采用单纯形算法，以经济性最优为目标函数对系统的运行参数进行了优化，分析了电上网政策对设备出力和系统性能的影响，并以能效、火用效和单位产能CO₂排放量作为评价指标，对该系统进行了综合评价.结果表明，与常规CCHP系统相比，该新型系统的年费用和单位产能CO₂排放量可分别减少2.9×10⁶元和29.82 g/（kW·h）,一次能源利用率和火用效率可分别提高4.05%和0.44%.更多还原

【Abstract】 A novel type of combined cooling, heating and power（CCHP）system coupled with LNG pressure energy has been proposed. Taking an industrial park in Xi ′an as the research object, an optimization model with the objective of economic optimization was established by using simplex algorithm. In addition, some parameters, such as energy efficiency, exergy efficiency and CO₂ emission per unit output value were taken as evaluation indexes to comprehensively evaluate the new system, and the influence of feed-in tariff on the output of various equipment and system performance was analyzed. The performance of the novel CCHP system was compared with that of conventional CCHP system, and the CO₂ emission per unit output value and annual cost of the system were reduced by 29.82 g/（kW·h） and 2.9×10⁶ CNY, respectively. Primary energy utilization and exergy efficiency increased by 4.05% and 0.44%, respectively.更多还原