YANG Jia-li,DU Kun,HOU Yi,et al.Optimal Design of Water Distribution System in Ancient Tourism Town Considering Multiple Fire-fighting Conditions[J].China Water & Wastewater,2021,37(17 17):38-43.
Optimal Design of Water Distribution System in Ancient Tourism Town Considering Multiple Fire-fighting Conditions
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
38-43
Column:
Date of publication:
2021-09-01
- Keywords:
- ancient tourism town; water distribution system; multiple fire-fighting conditions; differential evolution; optimal design
- Abstract:
- Municipal water distribution systems (WDSs) in ancient tourism towns usually have insufficient fire-fighting capacity, and traditional design method has the problems of relatively small value of fire-fighting design flow rate and unreasonable selection of fire-fighting conditions. A method for optimal design of WDS considering multiple fire-fighting conditions was thus proposed. The proposed method first selected typical buildings in different areas of ancient tourism towns and calculated their fire water demand by ISO method to build fire-fighting conditions, and then took the minimum required water pressure under different conditions as the constraint and the pipe diameter as the decision variable to formulate the optimization problem with network cost as the objective function. Differential evolution algorithm was applied to solve the optimization problem which satisfied the constraints of different design conditions and minimized the network cost. The proposed method was applied to the optimal design of WDS in Dayan ancient town, Lijiang. Overall fire-fighting capacity of the optimized scheme was about 6 L/s higher than that of the traditional scheme, and the network cost was about 8% lower than that of the traditional scheme. Besides, the fire-fighting capacity of the WDS for typical buildings met the design requirements after optimization, indicating that the proposed method was feasible. The WDS layout and nodal pressure changes were analyzed. For design of WDS in ancient tourism towns with large elevation variation and high fire risk, the main pipe should be laid to the control points with large fire water demand and high elevation, which was conducive to improving the overall firefighting capacity of the WDS and reducing the network cost.
Last Update:
2021-09-01