Results 41 to 50 of about 2,935 (118)

Simultaneous efficiency improvement of pump and turbine modes for a counter-rotating type pump-turbine

Advances in Mechanical Engineering, 2016
This article presents a multi-objective optimization to improve the hydrodynamic performance of a counter-rotating type pump-turbine operated in pump and turbine modes.
Jin-Woo Kim, Jun-Won Suh, Young-Seok Choi, Kyoung-Yong Lee, Joon-Hyung Kim, Toshiaki Kanemoto, Jin-Hyuk Kim   +6 more
doaj   +1 more source

CFD Modelling of Pump as Turbine with Various Number of Blade for Microhydro System

Journal of Applied Science & Process Engineering, 2016
Pump as Turbine is an electromechanically component that is largely used in microhydro system. The main advantages of pump as turbine compared to commercially available turbines are lower cost, easier to maintain and readily available. These key features
Mohd Azlan Ismail Ismail, Al Khalid Othman, Hushairi Zen, Mohd Suffian Misran   +3 more
doaj   +1 more source

Low power steam turbine energy efficiency and losses during the developed power variation

Tehnički Glasnik, 2018
This paper investigates low power marine steam turbine during the variation in its developed power. The turbine is used for the Main Feedwater Pump (MFP) drive.
Vedran Mrzljak
doaj   +1 more source

Response characteristics of ship steam power system under switchover of turbine feed water pump

Zhongguo Jianchuan Yanjiu
[Objectives] The switching performance of turbine feed water pump is a key technical indicator to decide the operation stability of ship steam power system, and it is of great significance to the safety of navigation.[Methods] Using the Modular Modeling ...
Yang Yuanlong, Wu Jinxiang, Zheng Zidu, Wu Wei, Sun Ling   +4 more
doaj   +1 more source

Using a Statistical-Numerical Procedure for the Selection of Pumps running as Turbines to be applied in Water Pipelines: Study Cases

Journal of Sustainable Development of Energy, Water and Environment Systems, 2018
A combined method using statistical and numerical models has been developed by the authors for selecting a pump running as turbine to be applied in micro-hydro plants.
Silvio Barbarelli, Mario Amelio, Gaetano Florio   +2 more
doaj   +1 more source

Development and Numerical Performance Analysis of a Pump Directly Driven by a Hydrokinetic Turbine

Energies, 2019
Marine and hydrokinetics (MHK) represent an emerging industry with hundreds of potentially viable technologies, such as potential extractable energy from plain area rivers where the water level differences are very small and the traditional water turbine
Daqing Zhou, Huixiang Chen, Yuan Zheng, Kan Kan, An Yu, Maxime Binama   +5 more
doaj   +1 more source

CFD Simulation and Optimization of Very Low Head Axial Flow Turbine Runner

International Journal of Renewable Energy Development, 2015
The main objective of this work is Computational Fluid Dynamics (CFD) modelling, simulation and optimization of very low head axial flow turbine runner  to be used to drive  a centrifugal pump of turbine-driven pump. The ultimate goal of the optimization
Yohannis Mitiku Tobo, A. Venkata Ramayya, Getachew Shunki Tibba   +2 more
doaj   +1 more source

Systematic analysis on the energy loss in pump-turbines

Advances in Mechanical Engineering
The pump-turbine is a key component in pumped-storage power stations, operating under complex conditions. RANS (Reynolds-Averaged Navier-Stokes) is commonly used for numerical simulations, but the differences among various RANS models under different ...
Miao Guo, Zhiheng Wang, Yan Shen, Ruixiang Song, Xuelin Tang, Xiaoqin Li   +5 more
doaj   +1 more source

Numerical Investigation in the Vaned Distributor under Different Guide Vanes Openings of a Pump Turbine in Pump Mode

Journal of Applied Fluid Mechanics, 2016
The performance of a pump turbine in pump mode is of great importance to a pumped storage power plant. In order to obtain the pump characteristics of a pump turbine, 3D steady simulations were carried out by solving rans using different two-equation ...
D. Y. Li, R. Z. Gong, H. J. Wang, Jian Zhang, X. Z. Wei, L. F. Shu   +5 more
doaj  

3D Compressible Flow Analysis of an Ultra-High-Head Pumped Storage Unit with Water Conveyance System at Maximum Pumping Head

Energies
Severe pressure pulsations caused by complex flow fields in pumped-storage power stations significantly threaten operational safety and stability. With advances in computational technology, fully three-dimensional simulations coupling pipelines and pump ...
Zhixing Li, Xinbo Li, Xingxing Huang, Tao Li, Meng Liu, Zhengwei Wang   +5 more
doaj   +1 more source