In long distance water supply projects, the air vessel is an effective and reliable protection measure to control water hammer. Although it can effectively eliminate water hammer during the process of hydraulic transient, the volume of the traditional air vessel is large due to the long distance pipeline, resulting in high investment. In this paper, based on the analysis of the transient in long distance water supply pipelines, a protection method, combining the air vessel with the downstream valve, is proposed to reduce the volume of the air vessel, keeping the system pressure within the limit. Furthermore, an innovative arrangement of the air vessel is presented to overcome the risk of the combined protection method. Besides the upstream air vessel, a downstream air vessel is additionally installed to mitigate positive water hammer due to rapid closure of the downstream valve. To verify the effect of the new method, the numerical model was established according to the parameters of a practical water supply project, and hydraulic transient due to pump trip was simulated. Compared with the traditional method, the combined protection method provides effective water hammer protection and greatly reduces the volume of the air vessel.
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1 August 2017
This article was originally published in
Journal of Water Supply: Research and Technology-Aqua
Article Contents
Research Article|
May 12 2017
Water hammer suppression for long distance water supply systems by combining the air vessel and valve
Di Miao;
Di Miao
1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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Jian Zhang;
Jian Zhang
1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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Sheng Chen;
Sheng Chen
1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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Xiao-dong Yu
1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
E-mail: [email protected]
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Journal of Water Supply: Research and Technology-Aqua (2017) 66 (5): 319–326.
Article history
Received:
December 02 2016
Accepted:
March 30 2017
Citation
Di Miao, Jian Zhang, Sheng Chen, Xiao-dong Yu; Water hammer suppression for long distance water supply systems by combining the air vessel and valve. Journal of Water Supply: Research and Technology-Aqua 1 August 2017; 66 (5): 319–326. doi: https://doi.org/10.2166/aqua.2017.131
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