Results 101 to 110 of about 2,868 (215)

The Effects of Post‐Activation Performance Enhancement on High Intensity Interval Training: A Comparison of Traditional and Cluster Set Protocols

European Journal of Sport Science, Volume 26, Issue 4, April 2026.
ABSTRACT The present study aimed to examine the effects of post‐activation performance enhancement (PAPE) protocols employing half‐squat exercises, performed using either a traditional set (PAPEtraditionalset) or a cluster set (PAPEclusterset), on peak oxygen uptake (V˙ $\dot{\mathrm{V}}$O2peak), the time spent at ≥ 90% maximal oxygen uptake (V˙ $\dot{\
Merve Cin, Özcan Saygın, Refik Çabuk
wiley   +1 more source

RELIABILITY OF THERMO-MECHANICAL EQUIPMENT IN POWER PLANTS – ELEMENTS WITH HIGH FAILURE R [PDF]

Analele Universităţii "Constantin Brâncuşi" din Târgu Jiu: Seria Inginerie, 2019
Thermal power plants are complex systems with many inter-dependence links and several critical elements that condition the operation of the whole plant. Failure of critical elements such as feed water pump results in a general shut down of the whole unit.
Bogdan Diaconu, Adriana Tudorache, Corina Diana Kaiser   +2 more
doaj  

Characteristics of reversible-pump turbines

, 2012
The primary goal for this PhD project has been to investigate instability of reversiblepump turbines (RPTs) as a phenomenon and to find remedies to solve it. The instability occurs for turbines with s-shaped characteristics, unfavourable waterways and limited rotating inertia. It is only observed for certain operation points at either high speed or low
openaire   +1 more source

Free‐Breathing, 3D Cardiac Magnetic Resonance Elastography for Myocardial Stiffness Mapping

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2356-2369, April 2026.
ABSTRACT Purpose Magnetic resonance elastography (MRE) of the heart has predominantly utilized breath‐held acquisitions with limited anatomic coverage. This work investigates the feasibility of 3D, free‐breathing cardiac MRE. Methods A 3D hybrid radial and EPI acquisition is utilized and combined with retrospective binning of k‐space via physiologic ...
Nolan K. Meyer, Yi Sui, Jessica Magnuson, Phillip J. Rossman, Kevin J. Glaser, Matthew C. Murphy, Armando Manduca, Ian C. Chang, Kiaran P. McGee, Kejal Kantarci, Ekta Kapoor, Philip A. Araoz, Richard L. Ehman, Joshua D. Trzasko, Arvin Arani   +14 more
wiley   +1 more source

Water‐Borne Erosion of Reinforced Polymer Composites: Application to Shallow Offshore Marine Environment

Polymer Composites, Volume 47, Issue 5, Page 4102-4126, 10 March 2026.
Comparison of experimental and model‐predicted erosion rates for carbon fibre‐reinforced polymer (CFRP) and glass fibre‐reinforced polymer (GFRP) under low‐velocity (2 m/s) and at varying angles and sand concentrations (0.0, 0.05, 0.4 g/L). The results demonstrate good agreement between experimental data and model predictions across different erosive ...
Ali Al‐Darraji, Christopher Lagat, Thaneshan Sapanathan, Peter Butt, Ibukun Oluwoye   +4 more
wiley   +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

Pump turbines in existing powerplants

, 2019
En brukervennlig metode for å designe kontraroterende aksialpumper har blitt utviklet ved bruk av Matlab. Grafiske brukergrensesnitt har blitt laget for å skrive inn designparametre og å vise designresultater. Designmetoden benytter seg av eksisterende løftelinjeteori for design og optimalisering av kontraroterende propeller, men den er modifisert for ...
openaire   +1 more source

Achieving Net‐Zero in the Electricity Sector in China by 2050 Considering Environmental and Economic Objectives

Advanced Sustainable Systems, Volume 10, Issue 3, March 2026.
China's pathways to net‐zero electricity by 2050 are evaluated using life cycle environmental and economic assessment across six scenarios. Results show that a renewables‐only grid offers the best overall environmental performance and lowest cost, but increases burdens on metal depletion, land use, and ecotoxicity.
Tingfeng Song, Harish K. Jeswani, Adisa Azapagic   +2 more
wiley   +1 more source

Towards Climate Neutrality by 2050: Role of Aluminum for Short‐ and Long‐Term Energy and Hydrogen Storage

Advanced Energy Materials, Volume 16, Issue 10, 11 March 2026.
The Aluminum energy storage cycle involves the use of renewable energy for Al production and the generation of heat (dry cycle) and heat and H2 (wet cycle) for energy production via Al‐steam combustion. ABSTRACT Reaching climate neutrality by 2050 requires innovative long‐term energy storage (LTES) solutions beyond the current use of fossil fuels ...
Lorenzo Trombetti, Stefano Passerini, Linda Barelli   +2 more
wiley   +1 more source