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针对城市夏季热负荷需求较小集中供热资源闲置的问题,提出夏季利用城市热网驱动吸收式制冷机组的分布式供冷方式。采用一次能源节能率方法对比分析该种供冷方式与常规电制冷方式的能效差异;通过临界热价指出分布式吸收式供冷方式的经济性。深入分析了热电联产系统的发电效率和供热效率、全国平均发电效率、制冷机组的性能系数等因素对分布式供冷方式的节能性、经济性和适宜性的影响。研究表明城市热网夏季分布式供冷方式不具备明显的节能效益和较大的经济效益空间。同时指出与溶液除湿系统联合使用可以改善城市热网夏季分布式供冷方式的节能性和经济性。
In view of the problem of the summer heat load in small central heating resource idle, this paper puts forward the distributed cooling mode which utilizes the city heating network to drive the absorption refrigeration unit in summer. The primary energy saving rate method is used to compare and analyze the difference of energy efficiency between this kind of cooling method and the conventional electric cooling method. The economical efficiency of distributed absorption cooling method is pointed out by the critical heat price. The factors such as power generation efficiency and heating efficiency of cogeneration system, national average power generation efficiency and coefficient of performance of chiller unit are deeply analyzed. The research shows that the summer heat distribution network in urban heating network does not have significant energy-saving benefits and large economic benefits. At the same time, it is pointed out that the combined use of the dehumidification system and the dehumidification system can improve the energy efficiency and economy of the summer distributed cooling system in urban heating network.