Results 1 to 10 of about 67,787 (224)

Effect of Operating Head on Dynamic Behavior of a Pump–Turbine Runner in Turbine Mode

Energies, 2022
Pumped storage units improve the stability of the power grid, and the key component is the pump–turbine. A pump–turbine usually needs to start and shutdown frequently, and the operating head varies greatly due to changes in the water level of the ...
Xiangyang Li, Jingwei Cao, Jianling Zhuang, Tongmao Wu, Hongyong Zheng, Yunfeng Wang, Wenqiang Zheng, Guoqing Lin, Zhengwei Wang   +8 more
doaj   +1 more source

Numerical Investigation of Flow and Structural Characteristics of a Large High-Head Prototype Pump–Turbine during Turbine Start-Up

Energies, 2023
Transient processes that occur in pumped storage power plants can cause high-pressure conditions, which in turn can result in vibrations in the pump–turbine structure and even damage to structural components.
Xilong Yin, Xingxing Huang, Shaozheng Zhang, Huili Bi, Zhengwei Wang   +4 more
doaj   +1 more source

Stability Analysis of Vaneless Space in High-Head Pump-Turbine under Turbine Mode: Computational Fluid Dynamics Simulation and Particle Imaging Velocimetry Measurement

Machines, 2022
When the Francis-type reversible pump-turbine runs under partial load, the pressure pulsation amplitude and frequency in vaneless space are high, posing a serious threat to the stability of unit operation.
Wanquan Deng, Lianchen Xu, Zhen Li, Wen Tang, Xiaolong Wang, Linmin Shang, Demin Liu, Xiaobing Liu   +7 more
doaj   +1 more source

Research on the Flow-Induced Stress Characteristics of Head-Cover Bolts of a Pump-Turbine during Turbine Start-Up

Energies, 2022
Nowadays, pump-turbine units have to experience multiple start-stops every day to balance the power production and consumption on the grid. During the transient process of turbine start-up, the hydraulic forces applied to the head-cover would change ...
Zhengwei Wang, Juwei Yang, Wei Wang, Jie Qu, Xingxing Huang, Weiqiang Zhao   +5 more
doaj   +1 more source

Exploring the Mechanism of Strong-Pressure Fluctuation under Partial Load in the Turbine Mode of Pump Turbines for Hydro and Marine Power Storage

Journal of Marine Science and Engineering, 2023
As a core component of pumped storage power plants for hydro and marine power storage, this paper investigates the mechanism of pressure pulsation fluctuations under different load conditions to improve the efficiency and operational stability of the ...
Jiahao Lu, Wei Yan, Ran Tao, Zhengwei Wang, Di Zhu   +4 more
doaj   +1 more source

Instabilities and influence of geometric parameters on the efficiency of a pump operated as a turbine for micro hydro power generation: A review

Journal of Sustainable Development of Energy, Water and Environment Systems, 2021
Compared to a traditional turbine (Kaplan, Francis, Pelton), pumps operated as turbine are a good alternative for micro hydroelectric power plants thanks to their low cost and easy availability.
Jonathan Graciano-Uribe, Jorge Sierra, Edwar Torres-Lopez   +2 more
doaj   +1 more source

Numerical Investigation on the Flow-Induced Vibration Characteristics of Fire Turbopump with the Turbine-Pump Structure

Applied Sciences, 2022
The vibration characteristics induced by radial hydraulic force on the fire turbopump have been investigated by numerical simulations in this paper. The numerical model was validated with corresponding experimental measurements.
Ye Yuan, Rong Jin, Lingdi Tang
doaj   +1 more source

Geometrical effects on performance and inner flow characteristics of a pump-as-turbine: A review

Advances in Mechanical Engineering, 2020
A pump-as-turbine is a hydraulic machine that can operate as a pump and turbine at the same time. Pump-as-turbine happens to be the most appropriate method for meeting the world’s energy demands, particularly in rural and isolated areas of a country ...
Stephen Ntiri Asomani, Jianping Yuan, Longyan Wang, Desmond Appiah, Fan Zhang   +4 more
doaj   +1 more source

Numerical and experimental study of mixed flow pump as turbine for remote rural micro hydro power plant application

Journal of Mechatronics, Electrical Power, and Vehicular Technology, 2022
The use of a pump as opposed to a turbine/pump as turbine (PAT) for off-grid electrification applications is one of the important ways to be considered in efforts to equalize electrical energy in Indonesia.
Sarid Mejiartono, Muhammad Fathul Hikmawan, Aditya Sukma Nugraha   +2 more
doaj   +1 more source

Hydrodynamic optimization of pump-turbine runner [PDF]

E3S Web of Conferences, 2023
The paper suggests the approach to automatic CFD-based optimization of the pump-turbine runner. An in-house 3D flow solver CADRUN is used for the solution of steady-state RANS equations and evaluation of objective functions in representative operating ...
Chirkov Denis, Skorospelov Vladimir, Turuk Polina, Rigin Valeriy, Ustimenko Alexander   +4 more
doaj   +1 more source