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摘要 结合工程实际，介绍了柴油发电机组的基本构造和发热量的构成。指出了采用换气次数法的弊端，并给出发电机房通风量的较合理计算方法。 关键词 柴油发电机　风冷冷却 水冷冷却 余热 通风量 Calculation method of diesel generator room ventilation rate for civil buildings By Cheng Wanfei★, Chang Zidong and Zhang Shuna Abstract With an actual project, presents the constitution of diesel generator and the composition of heat release. Presents the disadvantages of calculation method of air changes, and gives the relatively reasonable calculation method for the diesel generator room ventilation rate. Keywords diesel generator, cooling by air, cooling by water, waste heat, ventilation rate ★ Tianjin Port Engineering Design & Consulting Company Ltd.of CCC First Habour Engineering Co., Ltd., Tianjin, China