Results 61 to 70 of about 6,231 (266)

Space shuttle main engine: Interactive design challenges [PDF]

, 1985
The operating requirements established by NASA for the SSME were considerably more demanding than those for earlier rocket engines used in the military launch vehicles or Apollo program.
Mccarty, J. P., Wood, B. K.
core   +1 more source

Cavitation measurements on a pump-turbine model

Journal of Physics: Conference Series, 2015
When a hydraulic turbine is operated at off-design conditions, cavitation on the runner and other machine parts can occur. Vibration, noise and erosion caused by cavitation can damage the turbine and lead to a limitation of the operational range. To avoid damage of the turbine, it is fundamental to get knowledge of the presence of cavitation.
H Schmidt, O Kirschner, S Riedelbauch
openaire   +1 more source

Defossilisation of the Energy Supply of a Chemical Site by Integration of a Carnot Battery

Chemie Ingenieur Technik, EarlyView.
This study presents the results of a techno‐economic analysis of CO2‐free energy supply concepts for electricity and heat for the defossilisation of a chemical park in Germany for the model years 2030 and 2045. The focus is on the integration of a Carnot battery with thermal energy storage, which enables the flexible use of green fuels and renewable ...
Martin Bolten, Stefano Giuliano, Gerrit Koll, Judith Jäger, Arnulf Reitze, Michael Roling, Jana Stengler   +6 more
wiley   +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

Failure investigation of a large pump-turbine runner [PDF]

Engineering Failure Analysis, 2012
A failure investigation was conducted on a high-pressure machine with a large pump-turbine runner that was 2.9 m in diameter and had a maximum discharge rate of 32 m 3 /s. A part of the runner broke off during operation. This released a piece of the crown, which went through the machine, causing further damage. An analysis of the broken runner revealed
Egusquiza Estévez, Eduard, Valero Ferrando, Ma. del Carmen, Huang, Xingxing, Guardo Zabaleta, Alfredo de Jesús, Jou Santacreu, Esteban, Rodríguez, Cristian   +5 more
openaire   +3 more sources

Energy Flexibilization and Demand Response for a Novel Decentralized Power‐to‐Methanol Process

Chemie Ingenieur Technik, EarlyView.
This study presents the results of an optimization framework for the scheduling of a Power‐to‐methanol process coupled with an electrolyser, renewable energy sources and a battery. The optimal dynamic operating schedule is computed with different configurations and boundary conditions, showing the advantages of flexible operation.
Max Kollmer, Markus Vogelbacher, Mücahit Terzi, Mohit Singh, Francsico Vidal‐Vazquez, Jörg Matthes   +5 more
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  

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

Heat removal system for shutdown in nuclear thermal rockets and advanced concepts [PDF]

, 2017
© 2016 by the American Institute of Aeronautics and Astronautics, Inc.It is well-known that a nuclear thermal rocket (NTR) cannot be abruptly shut down. After a power manoeuver, the reactor has contaminated itself with fission products and the decay heat
Arias Montenegro, Francisco Javier, Parks, Geoffrey T.   +1 more
core   +2 more sources

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