Results 81 to 90 of about 23,169 (217)
Three Approaches to Low-Duty Turbo Compressor Efficiency Exploitation Evaluation
Applied Sciences, 2020 This paper presents three approaches for isentropic, energy, and exergy evaluations of a low-duty liquid natural gas (LNG) vapor turbo compressor during exploitation on a conventional LNG carrier.
Igor Poljak +3 more
doaj +1 more source
Performance of superadiabatic quantum machines
, 2016 We investigate the performance of a quantum thermal machine operating in finite time based on shortcut-to-adiabaticity techniques. We compute efficiency and power for a quantum harmonic Otto engine by taking the energetic cost of the superadiabatic ...
Abah, Obinna, Lutz, Eric
core +1 more source
On the role of recombination in common-envelope ejections [PDF]
, 2014 The energy budget in common-envelope events (CEEs) is not well understood, with substantial uncertainty even over to what extent the recombination energy stored in ionised hydrogen and helium might be used to help envelope ejection.
Ivanova, N. +2 more
core +1 more source
Techno‐Economic‐Environmental Assessment of Pyrolysis‐Based Power Production From Methane
Advanced Energy and Sustainability Research, Volume 7, Issue 4, April 2026.Methane pyrolysis enables low‐carbon power generation by converting natural gas into hydrogen and solid carbon without direct carbon dioxide formation. This study presents a comprehensive techno‐economic‐environmental assessment of an integrated pyrolysis‐based combined cycle (T‐cycle) and benchmarks its performance against a conventional natural gas ...
Muhammad Jalili Zarabadi, Siva Karuturi
wiley +1 more source
Performance Optimization of Fuel Cell Vehicle Air Compressor Impeller Based on Multi-objective Whale Optimization Algorithm [PDF]
Journal of Applied Fluid MechanicsAs fuel cell vehicles have broad development prospects, improving the performance of their air compressors is crucial for the normal and efficient operation of onboard fuel cells.
Y. Sun +5 more
doaj +1 more source
In Situ Methanation on Mars: A Process Concept Study on the Impact of H2/CO2 and Recycle Ratio
Chemie Ingenieur Technik, Volume 98, Issue 4, Page 156-164, April 2026.The rocket propellant methane can be produced on Mars by in situ resource utilization. The H2/CO2 ratio is decisive, and excess H2 is favored for providing sufficient propellant purity. The operation mode—with or without recycling of unreacted reactants—depends on the resource availability of the selected landing site. Abstract For return missions from
Franz Braun +4 more
wiley +1 more source
Exact and Asymptotic Measures of Multipartite Pure State Entanglement
, 2000 In an effort to simplify the classification of pure entangled states of multi (m) -partite quantum systems, we study exactly and asymptotically (in n) reversible transformations among n'th tensor powers of such states (ie n copies of the state shared ...
Bennett, Charles H. +4 more
core +1 more source
Single ion heat engine with maximum efficiency at maximum power [PDF]
, 2012 We propose an experimental scheme to realize a nano heat engine with a single ion. An Otto cycle may be implemented by confining the ion in a linear Paul trap with tapered geometry and coupling it to engineered laser reservoirs. The quantum efficiency at
E. Lutz +11 more
core +2 more sources
Sensitivity analysis applied to the multi-objective optimization of a MCFC hybrid plant [PDF]
, 2012 In this paper, the multi-objective optimization of a molten carbonate fuel cell (MCFC) based hybrid plant fueled with landfill gas is performed. System operation is significantly affected by off-design conditions.
Adriano Sciacovelli +27 more
core +1 more source
Applied SciencesThis study presents a streamlined and accurate approach for modeling the performance of hermetic reciprocating compressors under variable-speed conditions.
Jay Wang, Wei Lu
doaj +1 more source