如何选择制冷方式和选择哪种制冷方式最优是目前区域供冷系统( DCS) 规划建设时讨论的热点． 文中以所建立的电压缩式和蒸汽吸收式制冷系统的分析模型为基础，进行了以制冷系统单位冷量的经济成本最低为目标的对比研究． 结果表明: 蒸汽热价/电价比越大，两种制冷方式经济成本相等时的蒸汽输送距离越短; 当蒸汽热价/电价比大于1． 13 时，蒸汽吸收式制冷系统的经济成本恒高于电压缩式系统． 由此得到结论: 不同的制冷站应当结合蒸汽输送距离、电价和蒸汽热价选择适宜的制冷方式．

To choose what kind of cooling method in district cooling systems ( DCS) and how to choose have become hot topics in the DCS engineering field.In this paper,two exergy analysis models of steam absorption cooling system ( SACS) and electric compressor cooling system ( ECCS) are constructed,and on the basis of the two models,the two cooling systems are comparatively investigated by taking the minimum unit cooling exergoeconomy cost as the objectives.The results show that,when the two cooling systems have the same exergoeconomic cost,steam transport distance decreases as the ratio of steam exergy price to electricity price increases,and that,when the ratio is above 1.13,the exergoeconomy cost of SACS is always higher than that of ECCS.Therefore,an appropriate cooling system should be chosen by taking into consideration the steam transport distance,the electricity price and the steam exergy price.