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| Sensitivity analysis and orthogonal optimization design of air tank parameters in long-distance water transmission pump stations |
| ZHAO Binjuan1, CAO Kefan1, LIU Yulu1, SONG Yingnan1, CHEN Huilong1*, DAI Bin2 |
| 1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. VAG Water Systems(Taicang)Co., Ltd., Taicang, Jiangsu 215400, China |
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Abstract A long-distance water transmission project in Northwest China was taken as an example to explore the optimization design method of air tanks in long-distance water transmission pump stations. The maximum positive pressure and minimum negative pressure of water hammer of the pump station were selected as the optimization objectives. The initial gas pressure, height-diameter ratio, connecting pipe diameter, inlet and outlet resistance coefficient were selected as optimization variables. Based on the orthogonal optimization design method and KYPipe software, the range analysis method was used to obtain the influence of various parameters of the air tank on the maximum positive pressure and minimum negative pressure of water hammer. Simultaneously, the obtained results were sorted, compared and the optimal parameter combination was found. The results show that the initial gas pressure, connecting pipe diameter and outlet resistance coefficient have a great influence on the maximum positive pressure and minimum negative pressure of water hammer. Among which the initial gas pressure is the most sensitive parameter and has the greatest impact on the maximum positive pressure and minimum negative pressure. After comparison, it is found that the parameter combination of the optimal scheme is initial gas pressure 50 m, height diameter ratio 4, connecting pipe diameter 250 mm, inlet resistance coefficient 10 and outlet resistance coefficient 5. Compared with the original scheme, the optimized scheme reduces the maximum positive pressure of water hammer by 4.98% and increases the minimum negative pressure by 64.00%.
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Received: 31 March 2022
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