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Study on Residual Pressure Saving Energy by Valve Regulation in Booster Pumping Station

Author: HeXiangJun
Tutor: ZhangJingCheng
School: Harbin Institute of Technology
Course: Urban Water Resources
Keywords: water supply networks residual pressure saving energy valve regulation booster pump station PLC automatic control
CLC: TU991.35
Type: Master's thesis
Year: 2008
Downloads: 30
Quote: 1
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Abstract


Residual pressure valve regulation utilizing of pipe network saving energy technology through valve regulation to utilize residual pressure of pipe network is one kind of booster pump station saving energy methods.the technology could not only save energy wasted by pressure leak from pipe network of original pump station to water tank, but also avoid influence of normal using pipe network pressure around pump station caused by booster pump direct drawing water from pipe network.Based on simulation experiment, this paper researched the effect of saving energy of valve regulation in different operation conditions and the relationship between various affecting factors. Parameters of pump station operation were quantitated.The effect of saving energy between valve regulation and Residual Pressure Utlilzing Device(RPUD) was contrasted.Economic comparative analysis of pipe network residual pressure saving energy technology and the optimal operation scheme of residual pressure valve regulation utilizing were carried out. The PLC automatic control system of the optimal operation scheme was preliminary designed.Simulation experiment results show that effect of residual pressure saving energy technology was influenced by open degree of valves in pump station, pipe network residual pressure, influent flow and tank water level.The following is the optimal operation scheme: when influent flow (Q1) was more than effluent flow (Q), the open degree of the inlet valve was 2/5, the outlet valve fully closed, the middle valve fully opened; when influent flow (Q1) equaled effluent flow (Q), the inlet valve and outlet valve fully closed, the middle valve fully opened, the booster pump direct drawing water from pipe network; when influent flow (Q1) was less than effluent flow (Q), the outlet valve opened to meet the pumpage;when pipe network pressure was smaller than the pressure meeted normal using pipe network pressure,the middle valve closed to decrease the direct pumpage from pipe network to guarantee normal using pipe network pressure,in the same time, the outlet valve opened to meet the pumpage.The saving energy effect of the valve regulation by optimal operation scheme was better than RPUD and it avoid influence of normal using pipe network pressure around pump station. When influent flow (Q1) was greater than or equal to effluent flow (Q),the residual pressure of pipe network which could be used was higher by optimal operation scheme.The saving energy effect of pump station was more obvious and 37.08%～50.85% of saving energy based on normal pump station could be realized. When influent flow (Q1) was less than effluent flow (Q), the saving energy effect of pump station was not obvious.Based on optimal operation scheme, PLC analyzed the signals of pressure and flow rate acquised by sensor and sended Instruction to contrl the open degree of the valves.So it could reach the demand of automatic control.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Water distribution > Waterworks,pumping stations
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