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摘要 介绍了北京南站冷热电三联供系统设计，包括方案选择、负荷计算、系统配置、运行策略、节能分析等。认为使用燃气内燃机比燃气轮机更具优势，建议在电力并网前提下采用以电定热原则确定系统设备容量配置。 关键词 冷热电三联供 燃气内燃机 以电定热 北京南站 空调系统 Discussion of CCHP system in Beijing South Railway Station By Huang Baomin and Zhu Jianzhang Abstract Presents the design of combined cooling, heating and power（CCHP）system in the project, including scheme selection, load calculation, system configuration, operation strategy, energy saving analysis and economic evaluation. Considers that using gas engine is more advantageous than gas turbine. Suggests using the electrical demand first rule for determining the equipment capacities of the CCHP system in the condition of electricity interconnection. Keywords CCHP， gas engine， based electrical demand calculating heat demand， Beijing South Railway Station， air conditioning system