Results 61 to 70 of about 5,041 (207)

Research on AC motor pump starting problem of ram air turbine for civil aircraft

Hangkong gongcheng jinzhan
Ram air turbine starting AC motor pump procedure is an important operation after the failure of dual engines in civil aircraft. This procedure is affected by many factors such as temperature, airspeed, altitude, motor input frequency, and hydraulic oil ...
HONG Ye, WANG Bangting, MA Ying, WEI Peikun, PU Chengnan, WANG Fei   +5 more
doaj   +1 more source

Matching Heat Pump Configurations and Process Parameters for Cost‐Minimal Heat‐Integrated CO2 Capturing Process

Chemie Ingenieur Technik, EarlyView.
In a CO2 absorption process, it is investigated whether the adjustment of operating parameters facilitates the integration of different closed heat pump cycles considering various refrigerants. The influence of different integration concepts and electricity prices are investigated by means of resulting total annual costs.
Johannes Wloch, Marcus Grünewald, Julia Riese   +2 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

Numerical Predictions of Pressure Fluctuations in a Model Pump Turbine with Small Guide Vane Opening based on Partial Averaged Navier Stokes Approach

Journal of Applied Fluid Mechanics, 2016
Comparing with conventional hydraulic turbine (e.g. Francis turbine), pump turbine shows significant unstable characteristics because its design is a compromise between a pump and a turbine.
J. T. Liu, Yulin Wu, Yong Li
doaj  

Numerical Simulation and Computational Flow Characterization Analyses of Centrifugal Pump Operating as Turbine

Complexity, 2021
Using a pump in reverse mode as a hydraulic turbine remains an alternative for hydropower generation in meeting energy needs, especially for the provision of electricity to remote and rural settlements.
Du Jianguo, Guanghui Chang, Daniel Adu, Ransford Darko, Muhammad A. S. Khan, Eric O. Antwi   +5 more
doaj   +1 more source

Solar Fuels Via Methane Valorization: Thermochemical Pathways, Unified Metrics, and Techno‐Economic Perspectives

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A first‐of‐its‐kind review benchmarks three solar methane valorization pathways with unified performance metrics for clean fuel production. Meeting global climate targets and sustainable energy demands requires carbon‐neutral fuels and innovative conversion pathways.
Muhammad Abdulmoez, Amjad Othman, Majid Linjawi, Amro Al‐Qutub   +3 more
wiley   +1 more source

Gas Turbine Load Limited due to High Exhaust Temperature Deviation [PDF]

, 2022
Case StudiesThis case study presents an incident of sudden exhaust temperature spread increase of a medium power range Gas Turbine Generator (GTG) during normal operation.
Ng, Wei Sing, Pernama, Sutanto Augustino, Vengurlekar, Ashutosh, A Aziz, Ahmad Faiz   +3 more
core  

Study on the Influence of Split Blades on the Force Characteristics and Fluid–Structure Coupling Characteristics of Pumps as Turbines

Energies
In order to study the influence of split blades on the turbine force characteristics and fluid–structure coupling characteristics of pumps, this paper selected the IS 80-50-315 centrifugal pump, used as a reverse-acting hydraulic turbine, as the research
Fengxia Shi, Xuexue Zong, Guangbiao Zhao, Denghui Zhang, Pengcheng Wang, Haonan Zhan   +5 more
doaj   +1 more source

Flow characteristics analysis of an extra–high–head pump–turbine with splitter–blades under high pressure-pulsation condition [PDF]

E3S Web of Conferences
The new energy system aims to provide reliable, affordable and sustainable energy, and ultimately achieve carbon neutrality. But the unstable renewable energy sources including wind and solar increase the risk to the grid and the power system. The pumped–
Huang Xingxing, Huang Xiaoying, Bi Huili, Huang Yanqing, Xu Buchao, Wang Zhengwei   +5 more
doaj   +1 more source

Hydraulic Optimization of Two-Way Counter-rotating Axial Flow Pump Turbine

Frontiers in Energy Research, 2020
The two-way counter-rotation technology is mainly applied to the tidal power station. In this paper, the hydrodynamic optimization of the two-way counter-rotating axial-flow pump turbine is carried out.
Wang Xiuli, Lin Bin, Li Yang, Zhang Yan, Zhu Rongsheng, Long Yun, Fu Qiang   +6 more
doaj   +1 more source