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Ding J.,Jiangsu Surveying and Design Institute of Water Resources Co. | Shen G.,Jiangsu Surveying and Design Institute of Water Resources Co.
Hydraulic Engineering IV - Proceedings of the 4th International Technical Conference on Hydraulic Engineering, CHE 2016 | Year: 2016

In order to reveal the structural characteristics of full-tubular submersible gate pump, correct its layout and improve the calculation theories of structural stress, this paper expounds the structure and layout of the submersible gate pump. Based on the Solid- Works design software platform and using 3D SimulationXpress finite element analysis software, the analysis and calculation of stress and strain of the inlet gate were carried out. The advantages of the full-tubular submersible pump are that it has a shorter body length, is lightweight, has a diversified arrangement as well as is easy to combine with the gate and lift. According to the 3D finite element calculation theory, the simulated condition is close to the actual working condition, while the calculation results of gate stress and deformation are superior to the graphic methods. In a low-head irrigation and drainage area, such as polders along the Yangtze River and low-lying lands along the Huaihe River and Huaibei Plain in China, a lot of drainage culverts and sluice gates will be rebuilt into full-tubular submersible gate pumps. As a result, the structural analysis and optimal design methodology can provide a reliable theoretical support and a guarantee for a safe and reliable operation of the project. © 2016 Taylor & Francis Group, London, UK.


Gong Y.,Yangzhou University | Cheng J.,Yangzhou University | Zhang R.,Yangzhou University | Zhang R.,Jiangsu Surveying and Design Institute of Water Resources Co. | Huangfu Q.,Water Conservancy Bureau of Huaian City
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2013

A mathematical model of optimal operation with adjustable-blade and variable speed for multiple pump units in pumping station was made and a decomposition-dynamic programming aggregation method based on DPSA was proposed. With minimal daily electric consumption as the target, water quantity pumped by units as coordinated variable, the above-mentioned model was decomposed into several sub-models of daily optimal operation with adjustable-blade and variable speed for single pump unit. The sub-model took the blade angle and pump speed as decision variables, the discrete values of water quantity pumped by each unit as state variable, and was solved by applying DPSA. The constructed aggregation model took water quantity pumped by each pump unit as decision variable, the discrete values of water quantity pumped by pumping station as state variable, and was solved by dynamic programming method. Taking the operation of a pumping station as a case, the optimal operation of multiple pump units with adjustable-blade and variable speed has average cost saving of 5.80%, 25.19% and 32.20% under 100%, 80%, and 60% loads respectively.


Zhang R.,Yangzhou University | Zhu H.,Yangzhou University | Li C.,Nanjing Water Planning and Design Ins. Ltd. | Yao L.,Jiangsu Surveying and Design Institute of Water Resources Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

The shut-down process of bulb tubular pumping station with VFD will be a stabile and safe transient process through the speed lowing gradually. The features of normal shut-down process with VFD were analyzed. The flowing rate balance and torque dynamic balance equations were established. According to the characteristics of the VFD, the speed lowing law was designed and the main hydraulic parameters were simulated during the shut-down transient period by the numerical calculation, the optimal combination between the speed-lowing, the starting time point and closing time of the gate was discovered. The findings of the study provided various shut-down suggestions for safety and stability operation of bulb tubular pumping stations with VFD.


Lu Y.,Jiangsu Surveying and Design Institute of Water Resources Co. | Zhou W.,Jiangsu Surveying and Design Institute of Water Resources Co. | Ming Y.,Hanjiang District Water Resources Branch | Ding G.,Jiangsu Surveying and Design Institute of Water Resources Co.
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2014

In water conservancy hub projects located at plains, usually the pumping station and sluice are integrated together for a compact layout to save land and reduce costing. However, this combined layout can result in unwanted flow patterns, such as locally reverse flow, strong lateral current and so on. Thus, as a case study, the asymmetrical layout of integrated pumping station and sluice in North Yaoguang Water Conservancy Hub Project is optimized and finalized based on two-dimensional numerical stream simulations and a detailed discussion about the layout rationality and safety of navigation. It is shown that it is proper to install a diversion pier between the pumping station and the sluice upstream and downstream in order to alleviate uneven flow patterns and satisfy the safety of navigation. Additio-nally, the diversion pier can drive the reverse flow zones to further upstream and an increased length of the piers can reduce the velocity of lateral current. A trash rack bridge is installed in the intake of the pumping station to collect debris and improve flow patterns, causing an increased pump efficiency and operational stability. The results have significance for layout design in similar conservancy projects. ©, Editorial Department of Journal of Drainage and Irrigation Machinery Engineering. All right reserved.


Zhang R.,Yangzhou University | Yue X.,Jiangsu Water Supply Co. for S to N Water Diversion Project | Zhu H.,Yangzhou University | Yao L.,Jiangsu Surveying and Design Institute of Water Resources Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

A mixed-flow pumping system was selected as the study case based on CFD technologies. Two difference methodologies of flow field analysis and performance prediction were conducted. One method was that the system efficiency was the production of pump efficiency with passage efficiency obtained by separate numerical simulation of suction box and discharge passage without pump. The other one was based on the simulation of whole pumping system including the suction box, discharge passage and pump. The predicted results from the two different methodologies were compared with model system test results, which showed that the predicted errors were different. The error of pumping system efficiency was smaller when the numerical simulation of whole pumping system was adopted, while the error was much greater when the system efficiency was predicted by the production of passage efficiency with pump efficiency, approximately equal only near the best efficiency point. The larger errors in predicting pumping system efficiency for the first method were mainly caused by unreasonable theoretic foundation. Therefore, it is suggested that the suction box, discharge passage and pump should be taken as a whole in numerical simulation and performance prediction and the effect of pump should be considered in the optimal hydraulic design of suction box and discharge passage.


Gong Y.,Yangzhou University | Cheng J.,Yangzhou University | Zhang R.,Yangzhou University | Zhang R.,Jiangsu Surveying and Design Institute of Water Resources Co. | Zhang L.,Yangzhou University
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2011

Considering different condition adjustment, two stages decomposition-dynamic programming aggregation method was introduced to solve the mathematical model of daily optimal operation for parallel pumping stations which took the minimal daily electric cost of parallel pumping stations as objective function, the flow or speed of each unit as decision variable. Taking minimal daily electric cost of single pump station as objective function, allocation of water quantity pumped by each station as coordinated variable, this model was decomposed into several first stage sub-model of daily optimal operation for single pump station. Then taking minimal daily electric cost of single pump unit as objective function, allocation of water quantity pumped by each unit as coordinated variable, the first stage sub-model was decomposed into several second stage sub-model of daily optimal operation for single pump unit which takes the blade angle or unit speed as decision variable, the discrete value of water quantity pumped by each unit as state variable, and was solved by means of dynamic programming method. The constructed aggregation model took daily water quantity pumped by each pump unit as decision variable, the discrete value of water quantity pumped by parallel station group as state variable, and was also solved by dynamic programming method. This method could solve the optimal operation issues for parallel pumping stations with various operation modes, time period divisions and daily average heads of each station, and also provide theoretical support for the study on optimal operation of multi-stage pumping stations. Taking No.1, 3 Huaiyin pumping station as a study case, a series of optimization calculations were carried out. The results showed that the unit cost of optimal operation under 100%, 80%, and 60% loads within all average daily heads had an average energy consumption saving of 10.53%, 26.54% and 34.40%, respectively, compared with the operation with fixed blade angle and constant speed.


Zhu H.,Yangzhou University | Zhou W.,Jiangsu Surveying and Design Institute of Water Resources Co. | Zhang R.,Jiangsu Surveying and Design Institute of Water Resources Co.
IET Conference Publications | Year: 2014

Elbow-type suction box is widely applied to China's large and medium-scale vertical pumping systems. The bottom slab of elbow-type suction box in the inlet segment can be horizontal or has an upward angle, the cross-sectional area of which is gradually contracted along the way from the inlet section to the outlet section and the flowing water is gradually accelerated. Characteristic of small hydraulic loss and better flow pattern that can generate better flow conditions for pump. One of the shortcomings of elbowtype suction box lies in that its height is larger compared with other type ones, resulting in deeper foundation excavation of pump house and greater civil construction investment. In pump station engineering practice, the bottom slab of elbow-type suction box is often designed to have an upward angle in the inlet segment in order to raise the bottom elevations of both forbay and sump, so that the height of their wing walls can be reduced and the quantity of earth excavation and concrete works of the pump house foundation can be lessened. Based on a design case of a certain pump station in China, three optimized design schemes of an elbow-type suction box with different bottom slab upward angles were put forward, and the method of computational fluid dynamics was adopted to simulate the internal flow of pumping systems with different suction boxes to analyze the influence of bottom slab upward angle on flow conditions of pump in terms of internal flow patterns, hydraulic loss, distribution uniformity of outlet axial velocity and bias angle of outlet flow field. The numerical simulation results indicate that the upward angle of bottom slab can be regulated within a certain range, which mainly affects the average velocity of inlet section and the hydraulic loss of inlet segment, and slightly affects the distribution uniformity of outlet axial velocity, bias angle of outlet flow field and pumping system efficiency.


Gong Y.,Yangzhou University | Cheng J.,Yangzhou University | Zhang R.,Yangzhou University | Zhang R.,Jiangsu Surveying and Design Institute of Water Resources Co. | Zhang L.,Yangzhou University
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

A decomposition-dynamic programming aggregation method, which was applied to solve the mathematical model of daily optimal operation with adjustable-blade for multiple pump units in single pumping station, has been proposed. Taking minimal daily electric cost as objective function, the water quantity pumped by units as coordinated variable, this model was decomposed into several sub-models of daily optimal operation with adjustable-blade for single pump unit, in which the blade angle was taken as decision variable, the discrete values of water quantity pumped by each unit as state variable, and was solved by means of dynamic programming method. The constructed aggregation model takes water quantity pumped by each pump unit as decision variable, the discrete values of water quantity pumped by pumping station as state variable, and was also solved by dynamic programming method. This method could solve the optimal operation issues for multiple pump units with different types or performance differences in single pumping station. Taking operation of No.4 Huai'an Pumping Station as a study case, a set of optimization results was obtained.


Cheng J.-L.,Yangzhou University | Zhang L.-H.,Yangzhou University | Zhang R.-T.,Yangzhou University | Zhang R.-T.,Jiangsu Surveying and Design Institute of Water Resources Co. | Gong Y.,Yangzhou University
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2010

A dynamic planning model for optimal daily operation of single adjustable-blade pump station is proposed, in which minimum cost of energy consumption is set as the objective function, the different electric prices in peak and valley hours and water levels variation in the downstream of the pump station are defined as stage variables, the blade angle is expressed as a decision variable and the water volume to be pumped in a specified period is considered as constraint. The No.4 Jiangdu Pump Station is taken as a study case. The sump water level of this station is affected by the tide of Yangtze River. The application results shows that: (1) the comparison of optimal adjustable-blade scheme with that of designed setting angle of blade shows that in typical tidal process with designed average pumping head and operated at full-load, the energy-saving reaches 5.24%. The optimal blade angle is only related to the electric price in peak-valley loads. The blade angle -4° corresponds to peak loads and +2° corresponds to both valley loads and un-peak-valley loads; (2) The comparison of optimized results with fixed blade angle operation indicates that when the tidal stencils unchanged and average pumping heads are 4.8, 5.8, 6.8, 7.8 and 8.3m respectively, the cost saving is in the range from 3.4% to 6.2% with the average equal to 4.5%, and the specific pumping cost per cubic water decreases by 4.55%.


Gong Y.,Yangzhou University | Cheng J.,Yangzhou University | Zhang R.,Yangzhou University | Zhang R.,Jiangsu Surveying and Design Institute of Water Resources Co.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2013

In order to explore the optimal operation method of large-scale inter-basin water transfer projects, and fully excavate optimal operation benefit of multistage system, the two-stage decomposition-dynamic programming aggregation method was introduced to solve the mathematical model of daily optimal operation for parallel pumping stations, by which a series of optimal operation schemes under different average daily lifts and water pumping quantities were obtained. Considering different types of water consumption along the water transferring canal between two-stage pumping stations, by means of taking different start up time of pumping stations in the second stage, the obtained optimal operation schemes of pumping stations were adopted as boundary conditions and then substituted into mathematical model of one-dimensional unsteady flow to carry out the numerical simulation of water transferring canal, by which the changing process of water level in water transferring canal was simulated. According to the multiple schemes comparison and selection, the effective connection of water level between two-stage pumping stations was obtained and the optimal operation method of multistage pumping stations was preliminary proposed. Taking the two-stage pumping stations from Huai'an parallel pumping stations to Huaiyin parallel pumping stations as a study case, the optimal operation scheme of the entire multistage pumping stations system was obtained as follows: taking 4.15 m as the average daily lift and 80% loads as water pumping quantity for Huai'an parallel pumping stations, and taking 3.9 m as the average daily lift and 100% loads as water pumping quantity for Huaiyin parallel pumping stations, the start-up time of Huaiyin stations was 2 hours later than Huai'an stations. Under the optimization scheme above, the unit cost of water pumping for Huai'an parallel pumping stations and Huaiyin parallel pumping stations was 79.33 and 84.60 Yuan/104 m3 respectively, which had a respectively cost saving percentage of 25.06% and 7.3% compared with operation with fixed blade-angle and constant speed under the same average daily lift and water pumping quantities of each parallel pumping stations. The research can provide a reference for optimal operation of inter-basin water transfer system, especially for water level optimization of water transferring canals.

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