Results 11 to 20 of about 2,502,976 (307)

Exergy Analysis of Two-Stage Organic Rankine Cycle Power Generation System

open access: yesEntropy, 2020
Organic Rankine cycle (ORC) power generation is an effective way to convert medium and low temperature heat into high-grade electricity. In this paper, the subcritical saturated organic Rankine cycle system with a heat source temperature of 100~150 °C is
Guanglin Liu   +3 more
doaj   +1 more source

Invasive assessment of aortic stenosis in contemporary practice

open access: yesFrontiers in Cardiovascular Medicine, 2022
The authors review the current role of cardiac catheterization in the characterization of aortic stenosis, its main clinical applications, its pitfalls, and its additional value to the information provided by echocardiography.
João Brito   +5 more
doaj   +1 more source

Experimental and Numerical Study on the Elimination of Severe Slugging by Riser Outlet Choking

open access: yesEnergies, 2022
Severe slugging is an unstable multiphase flow pattern occurs in a pipeline riser with low gas and liquid flowrates. It is highly undesired in practical operation because of the pressure and mass flow oscillations induced.
Nailiang Li   +3 more
doaj   +1 more source

Synergetics: The cooperative phenomenon in multi-compressions S-CO2 power cycles

open access: yesEnergy Conversion and Management: X, 2020
Mature power plant uses regenerative steam Rankine cycle to achieve excellent performance, but there is a lack of general approach for gas Brayton cycle. Here, synergetics is introduced to construct multi-compressions S-CO2 cycle for the first time.
Enhui Sun   +5 more
doaj   +1 more source

Recent trends in the low-flow variability in Romania [PDF]

open access: yesRiscuri şi Catastrofe, 2018
In the context of climate changes, knowing the low-flow trends is very important for establishing appropriate measures for water resources management, in order to ensure their sustainability. This paper focuses on Romanian rivers and aims to identify the
I. TĂNASE, Liliana ZAHARIA
doaj   +1 more source

Study on Artificial Neural Network for Predicting Gas-Liquid Two-Phase Pressure Drop in Pipeline-Riser System

open access: yesEnergies, 2023
The pressure drop for air-water two-phase flow in pipeline systems with S-shaped and vertical risers at various inclinations (−1°, −2°, −4°, −5° and −7° from horizontal) was predicted using an artificial neural network (ANN).
Xinping Li   +5 more
doaj   +1 more source

Dopamine-Mediated Graphene Bridging Hexagonal Boron Nitride for Large-Scale Composite Films with Enhanced Thermal Conductivity and Electrical Insulation

open access: yesNanomaterials, 2023
Heat accumulation generated from confined space poses a threat to the service reliability and lifetime of electronic devices. To quickly remove the excess heat from the hot spot, it is highly desirable to enhance the heat dissipation in a specific ...
Shikun Li   +7 more
doaj   +1 more source

How to Construct a Combined S-CO2 Cycle for Coal Fired Power Plant?

open access: yesEntropy, 2018
It is difficult to recover the residual heat from flue gas when supercritical carbon dioxide (S-CO2) cycle is used for a coal fired power plant, due to the higher CO2 temperature in tail flue and the limited air temperature in air preheater. The combined
Enhui Sun   +4 more
doaj   +1 more source

Fabrication of Needle-Like Silicon Nanowires by Using a Nanoparticles-Assisted Bosch Process for Both High Hydrophobicity and Anti-Reflection

open access: yesMicromachines, 2021
In this work, a modified Bosch etching process is developed to create silicon nanowires. Au nanoparticles (NPs) formed by magnetron sputtering film deposition and thermal annealing were employed as the hard mask to achieve controllable density and high ...
Zengxing Zhang, Guohua Liu, Kaiying Wang
doaj   +1 more source

Aluminum-Based Fuels as Energy Carriers for Controllable Power and Hydrogen Generation—A Review

open access: yesEnergies, 2022
Metallic aluminum is widely used in propellants, energy-containing materials, and batteries due to its high energy density. In addition to burning in the air, aluminum can react with water to generate hydrogen. Aluminum is carbon-free and the solid-phase
Xinyue Gao   +4 more
doaj   +1 more source

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