Results 61 to 70 of about 3,496,599 (369)

Supercritical CO₂ Power Technology: Strengths but Challenges

Energies
In the late 1960s, a handful of inspired researchers predicted the great potential of supercritical CO2 (“sCO2”) cycles for the production of electricity and highlighted the prospects for dramatic reductions in component sizes and efficiency increases ...
Michel Molière, Romain Privat, Jean-Noël Jaubert, Frédéric Geiger   +3 more
doaj   +1 more source

Improving Thermal Efficiency of Internal Combustion Engines: Recent Progress and Remaining Challenges

Energies, 2022
Improving thermal efficiency and reducing carbon emissions are the permanent themes for internal combustion (IC) engines. In the past decades, various advanced strategies have been proposed to achieve higher efficiency and cleaner combustion with the ...
Rami Y. Dahham, Haiqiao Wei, Jiaying Pan
doaj   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Performance Analysis of Wave Rotor Combustor Integration into Baseline Engines: A Comparative Study of Pressure-Gain and Work Cycles

Energies
This study presents two concepts for integrating a wave rotor combustor (WRC) into a baseline engine: the wave rotor pressure-gain cycle (WRPGC) and the wave rotor work cycle (WRWC).
Renchuan Zheng, Erlei Gong, Jianzhong Li, Qian Yao, Zhaolong Nie   +4 more
doaj   +1 more source

Thermodynamic Analysis on the Performance of a Low-Enthalpy Geothermal Field Using a CO₂ Supercritical Binary Cycle

Chemical Engineering Transactions, 2019
The exploitation of geothermal energy can play a significant role for providing clean and renewable energy, especially when environmentally-friendly working fluids are used for power production.
Dimitrios Chasapis, Dimitrios Misirlis, Petros A. Papadopoulos, Kostas Kleidis   +3 more
doaj   +1 more source

Feasibility Study of the CO₂ Regenerator Parameters for Oxy-Fuel Combustion Power Cycle

Inventions, 2022
The atmosphere carbon dioxide content grows subsequently due to anthropogenic factors. It may be considerably mitigated by the development of thermal power plants with near zero emissions.
Vladimir Kindra, Ivan Komarov, Sergey Osipov, Olga Zlyvko, Igor Maksimov   +4 more
doaj   +1 more source

Optimizing thermodynamic trajectories using evolutionary and gradient-based reinforcement learning [PDF]

, 2019
Using a model heat engine, we show that neural network-based reinforcement learning can identify thermodynamic trajectories of maximal efficiency. We consider both gradient and gradient-free reinforcement learning.
Beeler, Chris, Coles, Rory, Mills, Kyle, Tamblyn, Isaac, Whitelam, Stephen, Yahorau, Uladzimir   +5 more
core  

Development of Ternary Magnesium Alloys for Laser Powder Bed Fusion: Optimizing Oxide Layer Thickness

Advanced Engineering Materials, EarlyView.
Additive manufacturing of magnesium alloys by laser is difficult because the melting point of the oxide layer is much higher than the evaporation temperature of the metal underneath. Making the oxide layer thinner can solve this problem. Alloying magnesium with strontium makes the oxide layer thinner, especially at 0.5 wt%.
Elmar Jonas Breitbach, Stefan Julmi, Sabine Behrens, Tatiana Blank, Arvid Abel, Nicole Emminghaus, Ludger Overmeyer, Christian Klose, Hans Jürgen Maier   +8 more
wiley   +1 more source

Second Law of Thermodynamics with Discrete Quantum Feedback Control

, 2008
A new thermodynamic inequality is derived which leads to the maximum work that can be extracted from multi-heat baths with the assistance of discrete quantum feedback control. The maximum work is determined by the free-energy difference and a generalized
A. S. Holevo, G. J. Milburn, J. C. Maxwell, M. A. Nielsen, Masahito Ueda, R. Landauer, T. M. Cover, Takahiro Sagawa   +7 more
core   +1 more source

Analysis of Temperature and Stress Distribution on the Bond Properties of Hybrid Tailored Formed Components

Advanced Engineering Materials, EarlyView.
Hybrid materials enable high‐performance components but are challenging to process. This study explores an inductive heating concept with spray cooling for steel–aluminum specimens in a two‐step process including friction welding and cup backward extrusion.
Armin Piwek, Eduard Ortlieb, Caner‐Veli Ince, Julius Peddinghaus, Hendrik Wester, Johanna Uhe, Annika Raatz, Kai Brunotte   +7 more
wiley   +1 more source