The optimal operation of water distribution networks under local pipe failures, such as water main breaks, was proposed. Based on a hydraulic analysis and a simulation of water distribution networks, a macroscopic mod...The optimal operation of water distribution networks under local pipe failures, such as water main breaks, was proposed. Based on a hydraulic analysis and a simulation of water distribution networks, a macroscopic model for a network under a local pipe failure was established by the statistical regression. After the operation objectives under a local pipe failure were determined, the optimal operation model was developed and solved by the genetic algorithm. The program was developed and examined by a city distribution network. The optimal operation alternative shows that the electricity cost is saved approximately 11%, the income of the water corporation is increased approximately 5%, and the pressure in the water distribution network is distributed evenly to ensure the network safe operation. Therefore, the proposed method for optimal operation under local pipe failure is feasible and cost-effective.展开更多
底栏栅式渠首是新疆粗颗粒山溪性河流引水防沙枢纽的首选类型,但实践运用表明,当引水量超过30 m 3/s时,渠首冲沙有利、工程布置紧凑的优势逐渐丧失,后期运行管理效益大打折扣。为此在保留原有布置优势的情况下,以扩大底栏栅引水流量为目...底栏栅式渠首是新疆粗颗粒山溪性河流引水防沙枢纽的首选类型,但实践运用表明,当引水量超过30 m 3/s时,渠首冲沙有利、工程布置紧凑的优势逐渐丧失,后期运行管理效益大打折扣。为此在保留原有布置优势的情况下,以扩大底栏栅引水流量为目标,提出了“⊥”型廊道新结构及优化布置方案,新结构在原垂直水流方向“—”型廊道结构基础上增设了顺水流方向“|”型廊道(根据流量的大小可布置双排甚至多排“|”型廊道),并结合底栏栅水流动力方程及取水流量计算方法得到了“⊥”型廊道取水流量的计算方法。随后以新疆头屯河渠首为例,在保持原平面布置不变的情况下引入“⊥”型廊道新结构,其引水量可达48.96 m 3/s,提升了39.89%,工程造价降低了63.46%。“⊥”型廊道新结构及布置方案突破了传统底栏栅式渠首设计引水流量相对较小的限制,拓宽了底栏栅式渠首的适用范围,还提高了经济效益,可为此类工程提供新的工程方案。展开更多
基金Project(50278062) supported by the National Natural Science Foundation of ChinaProject(003611611)supported by the Natural Science Foundation of Tianjin, China
文摘The optimal operation of water distribution networks under local pipe failures, such as water main breaks, was proposed. Based on a hydraulic analysis and a simulation of water distribution networks, a macroscopic model for a network under a local pipe failure was established by the statistical regression. After the operation objectives under a local pipe failure were determined, the optimal operation model was developed and solved by the genetic algorithm. The program was developed and examined by a city distribution network. The optimal operation alternative shows that the electricity cost is saved approximately 11%, the income of the water corporation is increased approximately 5%, and the pressure in the water distribution network is distributed evenly to ensure the network safe operation. Therefore, the proposed method for optimal operation under local pipe failure is feasible and cost-effective.
文摘底栏栅式渠首是新疆粗颗粒山溪性河流引水防沙枢纽的首选类型,但实践运用表明,当引水量超过30 m 3/s时,渠首冲沙有利、工程布置紧凑的优势逐渐丧失,后期运行管理效益大打折扣。为此在保留原有布置优势的情况下,以扩大底栏栅引水流量为目标,提出了“⊥”型廊道新结构及优化布置方案,新结构在原垂直水流方向“—”型廊道结构基础上增设了顺水流方向“|”型廊道(根据流量的大小可布置双排甚至多排“|”型廊道),并结合底栏栅水流动力方程及取水流量计算方法得到了“⊥”型廊道取水流量的计算方法。随后以新疆头屯河渠首为例,在保持原平面布置不变的情况下引入“⊥”型廊道新结构,其引水量可达48.96 m 3/s,提升了39.89%,工程造价降低了63.46%。“⊥”型廊道新结构及布置方案突破了传统底栏栅式渠首设计引水流量相对较小的限制,拓宽了底栏栅式渠首的适用范围,还提高了经济效益,可为此类工程提供新的工程方案。
