☆ 4.6 Article

Hydraulic Characterization of Variable-Speed Pump Turbine under Typical Pumping Modes

PROCESSES (2023)

Related references

Note: Only part of the references are listed.

Article Thermodynamics

Experimental and statistical analysis of the flap gate energy loss and pressure fluctuation spatiotemporal characteristics of a mixed-flow pump device

Bowen Zhang et al.

Summary: A flap gate is a necessary device that cuts off water flow, reduces energy consumption, and ensures pump unit safety. The energy loss of the flap gate and pressure fluctuation of the pump device were investigated using a high-precision test rig. The results showed that the residual circulation at the pump section outlet was one of the main causes of energy loss for the flap gate. The influence of the flap gate on energy loss can be ignored when the cut-off angle reaches 60 degrees or above. The pressure fluctuation at the impeller and guide vane outlet with the flap fully open under multiple flow rates was primarily monitored.

ENERGY (2023)

Add to Collection

Article Energy & Fuels

Performance improvement of a pump as turbine in storage mode by optimization design based on genetic algorithm and fuzzy logic

Fangfang Zhang et al.

Summary: This study focuses on a pump as turbine (PAT) unit in storage mode, where an effective parameterization method is used to control the geometric shape of the guide vane. The optimization strategy combines Fuzzy Logic (FL) with Genetic Algorithm (GA), and combines numerical simulation with experimental verification. The results show that the efficiency has significantly increased and the radial force has decreased, providing a new and effective optimization strategy for improving the matching relationship between the impeller and guide vane of turbine machineries.

JOURNAL OF ENERGY STORAGE (2023)

Add to Collection

Article Energy & Fuels

Pressure pulsation reduction in the draft tube of pump turbine in turbine mode based on optimization design of runner blade trailing edge profile

Fangfang Zhang et al.

Summary: This paper proposes an optimization method for reversible pump turbines, which achieves the minimum pressure pulsation by reconstructing the runner blade geometry and using the Genetic Algorithm combined with Fuzzy Logic. Numerical simulation and experimental verification show that the optimized unit has slightly improved efficiency and significantly reduced pressure pulsation intensity in the draft tube. Especially at small guide vane openings, the pressure pulsation performance of the optimized unit meets the actual engineering standards.

JOURNAL OF ENERGY STORAGE (2023)

Add to Collection

Article Thermodynamics

Guide vane profile optimization of pump-turbine for grid connection performance improvement

Fangfang Zhang et al.

Summary: Based on numerical simulation and experiments, this study proposes a method combining the Center-Radius guide vane profile parameterization method with B-spline curve and Genetic Fuzzy Algorithm for optimizing the guide vane shape of a pump-turbine unit with a guide vane opening of 5 degrees. The study analyzes the grid connection characteristics and operation stability between the initial and optimized units, and the results show that the optimization of guide vane shape can effectively improve operation stability and grid connection performance, providing an optimization idea for the further development of Pumped Storage Hydro (PSH).

ENERGY (2023)

Add to Collection

Article Energy & Fuels

Water saving options in hydropower by means of variable speed operation: A prototype study in a mid-head Francis turbine

Alexandre Presas et al.

ENERGY CONVERSION AND MANAGEMENT (2023)

Add to Collection

Article Mathematics, Applied

Viability Analysis of Tidal Turbine Installation Using Fuzzy Logic: Case Study and Design Considerations

Angel M. Rodriguez-Perez et al.

Summary: Tidal energy is a clean and sustainable source of energy that can address the challenges of renewable energy, particularly in terms of stable supply. This research aims to provide a digital tool based on fuzzy logic for optimizing the installation of tidal turbines. The tool considers various design criteria, such as salinity, temperature, currents, depth, and water viscosity, to determine the suitability of different turbine locations.

AXIOMS (2023)

Add to Collection

Article Engineering, Marine

Influence of the hydrofoil trailing-edge shape on the temporal-spatial features of vortex shedding

Zhaoheng Lu et al.

Summary: Ocean energy is a clean and valuable renewable resource that can be efficiently utilized through turbomachinery. This paper investigates the influence of trailing edge geometry on the downstream pressure field and clarifies the propagation law and weakening mechanism of pressure pulsation. The study provides an effective method and reference for understanding the downstream pressure pulsation variation of shedding vortex.

OCEAN ENGINEERING (2022)

Add to Collection

Article Thermodynamics

Effect of the pressure balance device on the flow characteristics of a pump-turbine

Jingwei Cao et al.

Summary: This paper establishes a CFD model to study the flow characteristics and pressure pulsation of a pump-turbine under different operating conditions. The results show that the pressure balance pipe and the discharge ostium have an impact on hydraulic thrust, and the pressure pulsation analysis provides a basis for understanding the hydraulic thrust frequency mechanism.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY (2022)

Add to Collection

Article Engineering, Marine

Investigation into cavitation damage potentiality using pressure pulsation phenomena in a low head Francis turbine for small hydropower schemes

Pankaj P. Gohil et al.

Summary: This study investigated the impact of cavitation on unsteady pressure pulsations in a low-head Francis turbine. The results showed that the submergence water level of the draft tube had a negligible effect on the dominating frequency under low-load and upper-part-load conditions, but the amplitude increased with the submergence of the head of the draft tube. Under overload conditions, the maximum amplitude occurred at the blade-passing frequency. The study also identified low-frequency high amplitudes in the draft tube. These findings suggest the potential for cavitation damage in low-head Francis runners under different operating conditions.

OCEAN ENGINEERING (2022)

Add to Collection

Article Green & Sustainable Science & Technology

Performance and radial thrust of single-blade reverse running pump turbine

Yasuyuki Nishi et al.

Summary: This study proposes the use of a single-blade centrifugal pump as a nonblocking water turbine, and investigates its performance and radial thrust through experiments and numerical analysis. The results show that the average value and fluctuating component of the total radial thrust increase with increasing flow rate.

RENEWABLE ENERGY (2022)

Add to Collection

Article Energy & Fuels

Research on Vibration Characteristics of an Underground Powerhouse of Large Pumped-Storage Power Station

Lijuan Zhang et al.

Summary: This paper investigates the vibration problems of underground powerhouses in large pumped-storage power stations, establishes finite element models, and conducts modal and dynamic response analysis to reveal the distribution law of vibration displacement positions. The research results provide references for the design of underground powerhouses in large-scale pumped-storage power stations and the analysis of vibration problems.

ENERGIES (2022)

Add to Collection

Article Green & Sustainable Science & Technology

Pressure fluctuation characteristics of a model pump-turbine during runaway transient

Wen-Tao Su et al.

Summary: This study uses numerical methods to investigate the dynamic flow characteristics of pump-turbine during runaway, focusing on the time-frequency relationship of pressure pulsations and the characteristics of frequency components. The results show that the low-frequency components of pressure oscillations are universal in the entire flow passage, mainly caused by the temporal changing of flow rate.

RENEWABLE ENERGY (2021)

Add to Collection

Article Green & Sustainable Science & Technology

Grid synchronization of variable speed pump-turbine units in turbine mode

Hu Wanfeng et al.

Summary: This paper investigates the start-up and grid synchronization procedure of pump-turbines with and without S-shaped characteristics, finding that variable speed units outperform fixed speed units for pump-turbines with S-shaped characteristics, and are faster and more stable for pump-turbines without these characteristics.

RENEWABLE ENERGY (2021)

Add to Collection

Article Engineering, Electrical & Electronic

Pumped Storage Hydro

Peter J. Donalek

IEEE POWER & ENERGY MAGAZINE (2020)

Add to Collection

Article Green & Sustainable Science & Technology

Variable speed operation of centrifugal pumps running as turbines. Experimental investigation

J. Delgado et al.

RENEWABLE ENERGY (2019)

Add to Collection

Proceedings Paper Construction & Building Technology

Pressure pulsations during a fast transition from pump to turbine mode of operation in laboratory and field experiment

M. F. Svarstad et al.

29TH IAHR SYMPOSIUM ON HYDRAULIC MACHINERY AND SYSTEMS (2019)

Add to Collection

Proceedings Paper Construction & Building Technology

Variable-speed operation and pressure pulsations in a Francis turbine and a pump-turbine

I. Iliev et al.

29TH IAHR SYMPOSIUM ON HYDRAULIC MACHINERY AND SYSTEMS (2019)

Add to Collection

Article Green & Sustainable Science & Technology

Numerical analysis of non-axisymmetric flow characteristic for a pump-turbine impeller at pump off-design condition

Zhao Xiaoran et al.

RENEWABLE ENERGY (2018)

Add to Collection

Article Green & Sustainable Science & Technology

Tip clearance on pressure fluctuation intensity and vortex characteristic of a mixed flow pump as turbine at pump mode

Yabin Liu et al.

RENEWABLE ENERGY (2018)

Add to Collection

Article Thermodynamics

Role of blade rotational angle on energy performance and pressure fluctuation of a mixed-flow pump

Tan Lei et al.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY (2017)

Add to Collection

Article Engineering, Civil

Three-dimensional transient simulation of a prototype pump-turbine during normal turbine shutdown

Zhongjie Li et al.

JOURNAL OF HYDRAULIC RESEARCH (2017)

Add to Collection

Article Green & Sustainable Science & Technology

Modeling and static optimization of a variable speed pumped storage power plant

J. Schmidt et al.

RENEWABLE ENERGY (2017)

Add to Collection

Article Energy & Fuels

Numerical Analysis of the Transient Behaviour of a Variable Speed Pump-Turbine during a Pumping Power Reduction Scenario

Giorgio Pavesi et al.

ENERGIES (2016)

Add to Collection

Review Green & Sustainable Science & Technology

S-shaped characteristics on the performance curves of pump-turbines in turbine mode - A review

Zhigang Zuo et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2016)

Add to Collection

Article Green & Sustainable Science & Technology

Low voltage ride-through strategies for doubly fed induction machine pumped storage system under grid faults

Amel Damdoum et al.

RENEWABLE ENERGY (2016)

Add to Collection

Article Thermodynamics

Dynamic response and governor tuning of a long penstock pumped-storage hydropower plant equipped with a pump-turbine and a doubly fed induction generator

Jose Ignacio Sarasua et al.

ENERGY CONVERSION AND MANAGEMENT (2015)

Add to Collection

Article Automation & Control Systems

Investigation of Control Strategies for Variable-Speed Pump-Turbine Units by Using a Simplified Model of the Converters

Yves Pannatier et al.

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS (2010)

Add to Collection

Article Thermodynamics

Adjustable speed operation of a hydropower plant associated to an irrigation reservoir

Juan I. Perez et al.

ENERGY CONVERSION AND MANAGEMENT (2008)

Add to Collection

Article Energy & Fuels

Modeling and dynamic simulations of doubly fed adjustable-speed pumped storage units

Jen-Kuang Lung et al.

IEEE TRANSACTIONS ON ENERGY CONVERSION (2007)

Add to Collection

Article Energy & Fuels

Variable-speed hydro generation:: Operational aspects and control

Jesus Fraile-Ardanuy et al.

IEEE TRANSACTIONS ON ENERGY CONVERSION (2006)

Add to Collection

© Peeref 2019-2024. All rights reserved.