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【英文篇名】 Optimal design for tree-shaped chilled water pipe network in district cooling systems 【作者中文名】 刘金平; 陈志勤; 【作者英文名】 By Liu Jinping★ and Chen hiqin★South China University of Technology; Guangzhou; China; 【作者单位】 华南理工大学; 【文献出处】 暖通空调, Journal of Heating Ventilating 枝状管网; 优化设计; 年度费用; 【英文关键词】 district cooling system; tree-shaped pipe network; optimal design; annual cost; 【摘要】 在各并联管路压力损失相等的条件下建立了优化设计模型,其目标函数为系统的年度费用,由冷水泵的年运行费用、冷水泵的折旧费用、管道的折旧和维修费用及输水管道冷量损失费用组成。通过实例计算,得到以下结论:区域供冷系统冷水管路的设计不能按传统的等比摩阻或等流速设计思想进行;采用优化模型比等流速设计年度总费用约减少17%,具有明显的经济效益;若采用等流速设计,各节点的压降偏差较大,会增加运行调节的困难,容易产生水力失稳,既不利于系统的稳定运行,又增大了运行费用。 【英文摘要】 Develops an optimal design model on condition that the pressure drops of each parallel connection loop are equal. The objective function of the model is the annual costs of the system, including annual operating costs and depreciation costs of chilled water pumps, depreciation and maintenance costs of pipeline, and costs of chiller power consumption rising from cold loss through chilled water pipe wall. By a case study, obtains the following results: the tree-shaped chilled water pipe network in district co...