技术中心

【英文篇名】 Determination of economic velocity and economic insulating layer thickness of secondary pump system for central cooling system of underground railway stations 【作者中文名】 彭金龙; 吴炜; 【作者英文名】 Peng Jinlong Wu Wei China Railway Eryuan Engineering Group Co; Ltd.; Chengdu; China; 【作者单位】 中铁二院工程集团有限责任公司; 【文献出处】 暖通空调, Heating Ventilating 优化模型; 经济流速; 经济保温厚度; 最低年成本; 【英文关键词】 variable secondary pump water system; optimal model; economic velocity; economic insulating layer thickness; minimum annual cost; 【摘要】 结合工程实例,通过建立二次泵变流量系统的优化模型,以年成本最低为原则,对地铁系统二次泵管路经济流速和经济保温厚度进行了计算和分析,得出影响经济流速的主要因素是管材类型、电价、区间隧道温度、输送半径、车站负荷、保温层价格及其导热系数,影响保温厚度的主要因素是区间隧道温度、电价、保温层价格及其导热系数、系统COP、车站负荷和冷水供水温度。采用大温差二次泵变流量系统供水管路和回水管路的热损耗有明显差异,建议结合管路特性,按不同区间分别计算供、回水管路的经济流速和经济保温厚度。 【英文摘要】 With an actual project,develops an optimal model of the variable secondary pump water system,calculates the economic velocity and economic insulating layer thickness with the minimum annual cost as the principle,and obtains that the major influencing factors on economic velocity are pipe type, power price,temperature in section tunnels,transportation radius,cold load of underground railway stations,price and thermal conductivity of insulation materials while the factors on economic insulating layer thicknes...