Results 21 to 30 of about 2,574 (142)

Performance Analysis for Francis Hydraulic Turbine based on Normalized Operating Condition and its Application

Chemical Engineering Transactions, 2015
The operating condition is normalized based on unit parameters and runner velocity triangle for hydraulic turbine in this paper. The hydraulic turbine performance is analyzed by using the normalized operating condition parameter and the actual data ...
Y.P. Li, H.L. Weng, J. Cheng, F.X. Chen
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

A Methodology for Designing a Fish-Friendly Turbine Rotor Applied to High-Power Generation [PDF]

Journal of Applied Fluid Mechanics, 2023
Most large hydropower facilities employing conventional hydraulic turbines, e.g., Francis, Kaplan, or Bulb turbines, etc., cause significant harm to fish, resulting in high mortality rates, during turbine operation.
G. E. Niño Del Río, R. G. Ramirez Camacho, N. Manzanares Filho, W. de Oliveira, T. M. Arispe Angulo   +4 more
doaj   +1 more source

Improvement of hydro-turbine draft tube efficiency using vortex generator

Advances in Mechanical Engineering, 2015
Computational fluid dynamics simulation was employed in a hydraulic turbine (from inlet tube to draft tube). The calculated turbine efficiencies were compared with measured results, and the relative error is 1.12%.
Xiaoqing Tian, Huachen Pan, Shuli Hong, Yuan Zheng   +3 more
doaj   +1 more source

Influence of Axial Installation Deviation on the Hydraulic Axial Force of the 1000 MW Francis Runner in the Rated Operating Condition

Energies, 2023
To study the influence of the axial installation deviation of the runner on the hydraulic axial force of the 1000 MW Francis turbine unit, geometric models of the full flow passage of the Francis turbine with the runner sinking in the axial direction by ...
Yongsheng Liu, Chengming Liu, Yongsheng Zhang, Xingxing Huang, Tao Guo, Lingjiu Zhou, Zhengwei Wang   +6 more
doaj   +1 more source

Critical Hydraulic Eccentricity Estimation in Vertical Turbine Pump Impeller to Control Vibration

International Journal of Rotating Machinery, 2021
In many applications, pumps are tested against standard specifications to define the maximum allowable vibration amplitude limits of a pump. It is essential to identify the causes of vibration and methods to attenuate the same to ensure the safe and ...
Ravindra S. Birajdar, Appasaheb A. Keste, Shravan H. Gawande   +2 more
doaj   +1 more source

Double Helix Structure for Stable Flexural Actuation in Soft Robotics

Advanced Intelligent Systems, EarlyView.
This work introduces a double‐helical architecture for soft robotic actuators that enhances twisting resistance, increases output force, and minimizes undesired deformation. Actuators driven by shape‐memory alloy wires exhibit a roughly fivefold higher torsional/flexural stiffness ratio and 50% greater force output.
Louis Plottel, Richard Desatnik, Dinesh K. Patel, Philip LeDuc, Carmel Majidi   +4 more
wiley   +1 more source

Numerical Analysis of the Flow by Using a Free Runner Downstream the Francis Turbine

International Journal of Turbomachinery, Propulsion and Power, 2023
The current requirements of industrialized countries require the use of as much renewable energy as possible. One significant problem with renewable energy is that the produced power fluctuates.
Alin Ilie Bosioc, Raul-Alexandru Szakal, Adrian Stuparu, Romeo Susan-Resiga   +3 more
doaj   +1 more source

Research on Diaphragm Pump Fault Diagnosis Method Based on Res‐DCB‐Net

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Nonstationary pressure pulsation signals of diaphragm pumps contain strong background noise and coupled characteristics. This makes it challenging to extract incipient fault features and to decouple faults with similar physical mechanisms. To address these limitations, this paper proposes a spatiotemporal fault diagnosis model named Res‐DCB ...
Jiahui Wang, Kaili Zhang, Yongxing Song, Zhaoxin Ma, Sitong Guan, Rongwang Chai, Kexiang Ceng, Jingting Liu   +7 more
wiley   +1 more source

Performance assessment of a potential underground thermal storage facility: Case study of the closed mine Prosper‐Haniel in the Ruhr coal mining area in Germany

Deep Underground Science and Engineering, EarlyView.
This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley   +1 more source