scholarly journals Global energy conversion rate from geostrophic flows into internal lee waves in the deep ocean

2011 ◽  
Vol 38 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Maxim Nikurashin ◽  
Raffaele Ferrari
Keyword(s):  
Energy Conversion ◽  
Conversion Rate ◽  
Deep Ocean ◽  
Global Energy ◽  
Lee Waves ◽  
Geostrophic Flows

MOF-derived PtCo/Co3O4 nanocomposites in carbonaceous matrices as high-performance ORR electrocatalysts synthesized via Laser Ablation techniques

2021 ◽  
Author(s):  
Erick Leonar Ribeiro ◽  
Elijah M Davis ◽  
Mahshid Mokhtarnejad ◽  
Sheng Hu ◽  
Dibyendu Mukherjee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Laser Ablation ◽  
Energy Conversion ◽  
High Performance ◽  
Sustainable Energy ◽  
Ablation Techniques ◽  
Global Energy ◽  
Cell Technology ◽  
Energy Demands ◽  
Rational Development

Rapidly expanding global energy demands due to fast-paced human-technology interfaces have propelled fuel cell technology as a sustainable energy-conversion alternative. Nonetheless, the rational development of such technology demands the engineering...

scholarly journals Deep ocean wave energy conversion using a cycloidal turbine

2011 ◽  
Vol 33 (2) ◽  
pp. 110-119 ◽  
Author(s):  
S.G. Siegel ◽  
T. Jeans ◽  
T.E. McLaughlin
Keyword(s):  
Energy Conversion ◽  
Wave Energy ◽  
Deep Ocean ◽  
Ocean Wave ◽  
Wave Energy Conversion ◽  
Ocean Wave Energy

Space Charge Enhanced Ion Transport in Heterogeneous Polyelectrolyte/Alumina Nanochannel Membranes for High-Performance Osmotic Energy Conversion

2021 ◽  
Author(s):  
Chen-Wei Chang ◽  
Chien-Wei Chu ◽  
Yen-Shao Su ◽  
Li-Hsien Yeh
Keyword(s):  
Ion Transport ◽  
Space Charge ◽  
Energy Conversion ◽  
High Performance ◽  
Salinity Gradient ◽  
Clean Energy ◽  
Energy Resources ◽  
Global Energy ◽  
Energy Demands ◽  
Selective Membrane

Capturing osmotic energy from a salinity gradient through an ion-selective membrane is regarded as one of the renewable clean energy resources to solve the increasing global energy demands. However, suffering...

scholarly journals Climate Process Team on Internal Wave–Driven Ocean Mixing

2017 ◽  
Vol 98 (11) ◽  
pp. 2429-2454 ◽  
Author(s):  
Jennifer A. MacKinnon ◽  
Zhongxiang Zhao ◽  
Caitlin B. Whalen ◽  
Amy F. Waterhouse ◽  
David S. Trossman ◽  
...  
Keyword(s):  
Internal Wave ◽  
Turbulent Mixing ◽  
Low Frequency ◽  
Internal Tide ◽  
Deep Ocean ◽  
Global Ocean ◽  
Primary Role ◽  
Inverse Models ◽  
Lee Waves ◽  
Mixing Rates

Abstract Diapycnal mixing plays a primary role in the thermodynamic balance of the ocean and, consequently, in oceanic heat and carbon uptake and storage. Though observed mixing rates are on average consistent with values required by inverse models, recent attention has focused on the dramatic spatial variability, spanning several orders of magnitude, of mixing rates in both the upper and deep ocean. Away from ocean boundaries, the spatiotemporal patterns of mixing are largely driven by the geography of generation, propagation, and dissipation of internal waves, which supply much of the power for turbulent mixing. Over the last 5 years and under the auspices of U.S. Climate Variability and Predictability Program (CLIVAR), a National Science Foundation (NSF)- and National Oceanic and Atmospheric Administration (NOAA)-supported Climate Process Team has been engaged in developing, implementing, and testing dynamics-based parameterizations for internal wave–driven turbulent mixing in global ocean models. The work has primarily focused on turbulence 1) near sites of internal tide generation, 2) in the upper ocean related to wind-generated near inertial motions, 3) due to internal lee waves generated by low-frequency mesoscale flows over topography, and 4) at ocean margins. Here, we review recent progress, describe the tools developed, and discuss future directions.

Effect of Coil Parameters on Rivet Deformation in Low Voltage Electromagnetic Riveting

2012 ◽  
Vol 602-604 ◽  
pp. 1887-1890
Author(s):  
Jiang Hua Deng ◽  
Chao Tang ◽  
Yi Ming Zheng ◽  
Yan Ran Zhan
Keyword(s):  
Energy Conversion ◽  
Cross Section ◽  
Discharge Current ◽  
Conversion Rate ◽  
Low Voltage ◽  
Current Amplitude ◽  
Deformation Degree ◽  
Section Size ◽  
Wire Cross Section ◽  
Electromagnetic Riveting

Electromagnetic riveting is a kind of energy conversion technology and forming coil is the key component of energy conversion. Coil parameters include the turns and wire cross section size. The effects of coil parameters on discharge current, riveting force, rivet deformation degree and energy conversion rate were investigated by experimental method in low voltage electromagnetic riveting. The results show that with the coil turns increasing, coil inductance increases, discharge current amplitude decreases, cycle increases, rivet deformation degree increases and the energy conversion rate improves when the coil wire cross section size is the same. And with the coil wire width increasing, the coil resistance decreases, discharge current amplitude increases, rivet deformation degree increases and the energy conversion rate improves when the coil turns is same. By rational design of coil turns and wire section size, low voltage electromagnetic riveting is an effective way to realize deformation of strain rate sensitive material TA1 rivets.

scholarly journals Modern energetics: current problems in energy conversion and utilization of produced energy

2017 ◽  
Vol 89 (10) ◽  
pp. 1521-1534
Author(s):  
Michail V. Alfimov ◽  
Vladimir F. Razumov
Keyword(s):  
Natural Gas ◽  
Energy Conversion ◽  
Primary Energy ◽  
Energy Industry ◽  
Maximum Efficiency ◽  
Energy Sources ◽  
Rational Utilization ◽  
Global Energy ◽  
Physical Constraints ◽  
State Of Art

AbstractIn this study, we discussed the state-of-art in global energy industry in a historical retrospective and the forecast of its development for the next 25 years. At least in the nearest quarter of a century, the main source of primary energy will remain the chemical energy of different hydrocarbon fuels, including natural gas, coal, oil, and biofuels. In this context, of current importance becomes the problem of more rational utilization of produced energy. We analyzed the basic physical constraints that define a maximum efficiency of energy conversion and utiliztion of primary energy sources.

scholarly journals Effect of Agricultural Feedstock to Energy Conversion Rate on Bioenergy and GHG Emissions

2015 ◽  
Vol 7 (5) ◽  
pp. 5981-5995 ◽  
Author(s):  
Chih-Chun Kung ◽  
Meng-Shiuh Chang
Keyword(s):  
Energy Conversion ◽  
Conversion Rate ◽  
Ghg Emissions

High Electromechanical Coupling Piezoelectrics - How High Energy Conversion Rate is Possible

1996 ◽  
Vol 459 ◽  
Author(s):  
Kenji Uchino
Keyword(s):  
Energy Conversion ◽  
Lead Zirconate Titanate ◽  
Conversion Rate ◽  
Electromechanical Coupling ◽  
Crystal Form ◽  
Lead Zirconate ◽  
High Energy ◽  
Coupling Factor ◽  
Lead Zinc ◽  
Titanate Ceramics

ABSTRACTA new category of piezoelectric ceramics with very high electromechanical coupling was discovered in a lead zinc niobate:lead titanate solid solution in a single crystal form. The maximum coupling factor k33 reaches 95%, which corresponds to the energy conversion rate twice as high as the conventional lead zirconate titanate ceramics. This paper reviews the previous studies on superior piezoelectricity in relaxor ferroelectric: lead titanate solid solutions and on the possible mechanisms of this high electromechanical coupling.

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