Results 81 to 90 of about 46,180 (274)
Energy Science &Engineering, EarlyView.This article introduces an operation strategy utilizing a hydrogen and biomass collaborative energy storage to regulate the power supply and demand. The results show that the system achieves annual average energy and exergy efficiencies of 87.77% and 67.16%, respectively.
Kai Ding, Ximin Cao, Yanchi Zhang
wiley +1 more source
Performance Prediction of Centrifugal Norm Pumps Operating as Turbines
FluidsPump-as-turbines (PAT) has been widely used during the last decade as one of the most interesting technologies in the field of energy recovery. Many studies and papers have been published in which the performance of the pumps in the turbine operating ...
Jasmina Bogdanović-Jovanović +3 more
doaj +1 more source
Energies, 2019 The positive slope on the pump performance curve of pump-turbines suggests potential operational instabilities in pump mode. Previous research has indicated that the increase of the hydraulic loss caused by sudden changes of flow patterns in pump ...
Guocheng Lu +3 more
doaj +1 more source
Energy Science &Engineering, EarlyView.The wind energy potential of Khaf was evaluated for 2025 using 15 years of wind data combined with advanced forecasting models, SARIMAX and Prophet. This integrated framework enables precise estimation of wind power density and optimal turbine selection, paving the way for the efficient and sustainable development of wind farms in the region.
Mohammad Amin Valizadeh +3 more
wiley +1 more source
Energy Science &Engineering, EarlyView.This study presents a new control strategy for doubly fed induction generator (DFIG) wind turbine systems to overcome the limitations of traditional direct field control using proportional‐integral (DFOC‐PI) regulators, which are sensitive to coefficient changes and lead to low power quality.
Hamza Gasmi +5 more
wiley +1 more source
Applied SciencesThis paper proposes an Adaptive Robust Control (ARC) strategy for pump-controlled pitch systems in large wind turbines to address challenges in control accuracy and energy efficiency.
Tiangui Zhang +7 more
doaj +1 more source
Torsional Vibrations at Guide-Vane Shaft of Pump–Turbine Model
Shock and Vibration, 1997 This article focuses on the problem of guide-vane vibrations of reversible pump–turbines, especially, in the pump mode. These vibrations are transmitted to the guide-vane shaft torque. The guide-vane vibrations are caused by the impeller exit flow, which
Andrej Predin
doaj +1 more source
Computer code for single-point thermodynamic analysis of hydrogen/oxygen expander-cycle rocket engines [PDF]
This analysis and this computer code apply to full, split, and dual expander cycles. Heat regeneration from the turbine exhaust to the pump exhaust is allowed.
Glassman, Arthur J., Jones, Scott M.
core +1 more source
Noise, Vibration, and Harshness (NVH) Challenges in Hydrogen Internal Combustion Engine Vehicles
Energy Science &Engineering, EarlyView.ABSTRACT This paper presents a state‐of‐the‐art literature review on noise, vibration, and harshness (NVH) in hydrogen‐fuelled internal combustion engines. Studies published between 2011 and 2025 were screened, covering fundamental flame physics, test‐bench work, and recent prototype vehicles.
Krisztián Horváth
wiley +1 more source
Development of a robust structural health monitoring system for wind turbine foundations [PDF]
, 2012 The construction of onshore wind turbines has rapidly been increasing as the UK attempts to meet its renewable energy targets. As the UK’s future energy depends more on wind farms, safety and security are critical to the success of this renewable energy ...
Currie, Magnus +2 more
core +1 more source