Results 21 to 30 of about 2,888 (220)

Transient Flow-Induced Stress Investigation on a Prototype Reversible Pump–Turbine Runner

Energies
Pump–turbine units with high heads are subjected to strong pressure pulsations from the unsteady transient flow in fluid channels, which can produce severe vibrations and high stresses on the pump–turbine structural components.
Dehao Zhang, Qiang Quan, Xingxing Huang, Zhengwei Wang, Biao Wang, Yunfeng Xiao   +5 more
doaj   +1 more source

Optimized Blade Design of Counter-Rotating-Type Pump-Turbine Unit Operating in Pump and Turbine Modes

International Journal of Rotating Machinery, 2018
In this study, a counter-rotating-type pump-turbine unit was optimized to improve the pump and turbine mode efficiencies simultaneously. Numerical analysis was carried out by solving three-dimensional Reynolds-averaged Navier–Stokes equations using the ...
Jin-Woo Kim, Jun-Won Suh, Young-Seok Choi, Kyoung-Yong Lee, Toshiaki Kanemoto, Jin-Hyuk Kim   +5 more
doaj   +1 more source

Numerical Analysis on the Hydraulic Thrust and Dynamic Response Characteristics of a Turbine Pump

Energies, 2022
Pumps as turbines are widely used in the world, wherein the hydraulic thrust of a turbine pump is one of the key factors affecting the safe and stable operation of a unit.
Linghua Kong, Jingwei Cao, Xiangyang Li, Xulei Zhou, Haihong Hu, Tao Wang, Shuxin Gui, Wenfa Lai, Zhongfeng Zhu, Zhengwei Wang, Yan Liu   +10 more
doaj   +1 more source

Selective hydrometallurgical recovery of gold by using low-cost biomass waste: Kiwi peel

Adsorption Science & Technology
Utilization of kiwi peel (KP) is proposed for gold recovery from electronic wastes (e-wastes). KP was simply modified by dehydration pretreatment with concentrated sulfuric acid.
Dan Yu, Xiaomei Guo, Yang Liu
doaj   +1 more source

Flow-Induced Vibration of Non-Rotating Structures of a High-Head Pump-Turbine during Start-Up in Turbine Mode

Energies, 2022
Pumped storage-power plants play an extremely important role in the modern smart grid due to their irreplaceable advantages in load peak-valley regulation, frequency modulation, and phase modulation.
Mengqi Yang, Weiqiang Zhao, Huili Bi, Haixia Yang, Qilian He, Xingxing Huang, Zhengwei Wang   +6 more
doaj   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Operation strategy of the heliostat field and receiver based on categorization of DNI fluctuation types

Scientific Reports
Transient changes in receiver heat are due to Direct Normal Irradiance (DNI) fluctuations, requiring operational strategies for receiver safety in cloudy weather.
Jing Nie, Weijia Wang, Xiaomei Guo, Jie Huang   +3 more
doaj   +1 more source

Graphene‐Skinned Alumina Fiber: Continuously Scalable Fabrication and Its Electrothermal Application in Fiber‐Reinforced Polymer Composites

Advanced Science, EarlyView.
Graphene‐skinned alumina fiber (GAF) is a new composite with graphene conformally grown on individual alumina fibers via chemical vapor deposition (CVD). GAF's dynamic, continuous and scalable production is achieved by using a home‐made roll‐to‐roll (RTR) CVD system featuring integrated degumming and growth chambers. GAF possesses tunable conductivity,
Xiaobai Wang, Wenjing Jiang, Jingnan Wang, Yuejie Zhao, Enshan Liu, Fushun Liang, Yixin Zhang, Qingqing Liu, Kangyi Zheng, Yuyao Yang, Fan Yang, Xiao Jiang, Yue Qi, Zhongfan Liu   +13 more
wiley   +1 more source

Design and Performance Analysis of a Thermal Energy Storage System With Steam Extraction and Electric Heating in a Coal‐Fired Power Plant

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To alleviate the impact of the instability of renewable energy power generation on the power grid, coal‐fired power plants (CFPPs) have to undertake peak shaving tasks, which puts forward high requirements for the flexibility of CFPPs. To enhance the flexibility of CFPPs to consume more renewable energy, this paper innovatively proposes a ...
Yuguo Ni, Keliang Liu, Miao Yu, Hao Zhou
wiley   +1 more source

Reverse engineering of impellers to reduce pipe network pressure and enable sustainable power generation using pumps as turbines (PATs)

Results in Engineering
A pump working as a turbine is a hydraulic machine type that can operate as both a pump and a turbine (PAT) by reversing the flow direction. The PAT could be an effective method for meeting global energy demands, particularly in rural and isolated areas.
Ali Abdulshaheed, Faizal Mustapha, Shahrul Sham Dol, Kamarul Ariffin Ahmad, Mazli Mustapha, Mohd Anuar   +5 more
doaj   +1 more source