Results 21 to 30 of about 8,743,114 (397)

Matrixed modeling method and entropy generation minimization analysis of heat supply system based on standard thermal resistance

open access: yesEnergy Science & Engineering, 2023
Complex implicit expressions and many intermediate parameters are not conducive to the application of entropy generation optimization to the performance of thermal and energy systems from component and system perspectives.
Chenzhi Ju   +5 more
doaj   +1 more source

Review of supercritical carbon dioxide (sCO2) technologies for high-grade waste heat to power conversion

open access: yesSN Applied Sciences, 2020
In the European Industry, 275 TWh of thermal energy is rejected into the environment at temperatures beyond 300 °C. To recover some of this wasted energy, bottoming thermodynamic cycles using supercritical carbon dioxide (sCO2) as working fluid are a ...
Matteo Marchionni, G. Bianchi, S. Tassou
semanticscholar   +1 more source

Preparation of Sulfur-doped Porous Carbon and Its Electro-adsorption Performance for Heavy Metals in Desulfurization Wastewater

open access: yes发电技术, 2023
Heavy metal pollution in desulfurization wastewater from coal-fired power plants has huge potential harm to the environment. Among them, the problem of heavy metal ions such as Pb2+, Cd2+ and Cr3+ is particularly prominent. Efficient and targeted removal
YIN Taozhu   +3 more
doaj   +1 more source

Subjective–objective methodology on selection of power quality compensation technology in AC–DC network with electrified railways

open access: yesThe Journal of Engineering, 2019
Electrified railways contain DC devices and cause power quality (PQ) issues such as harmonics, unbalance, and low-power factor, which should be solved by the most effective compensation technology to reduce the cost.
Yizheng Xu   +3 more
doaj   +1 more source

Power Conversion and Its Efficiency in Thermoelectric Materials. [PDF]

open access: yesEntropy (Basel), 2020
The basic principles of thermoelectrics rely on the coupling of entropy and electric charge. However, the long-standing dispute of energetics versus entropy has long paralysed the field.
Feldhoff A.
europepmc   +2 more sources

Hydroacoustic Power Conversion [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1970
Hydroacoustic power conversion is the controlled generation of acoustic or vibratory energy from hydraulic power. Basic concepts of high-power self-excited hydroacoustic vibration generators are described, the envelope of interest covering frequencies ranging from the subsonic region to the kilohertz region, and power levels extending in some instances
J. V. Bouyoucos, B. A. Wise
openaire   +1 more source

Research and Development of Nondestructive Detection Technology for Wind Turbine Blades

open access: yesZhongguo dianli, 2023
In addition to withstanding aerodynamic forces, blades also experience other forces such as gravity and centrifugal force during operation, as well as damage from rain, snow, sand, salt spray, lightning and other factors, making the wind turbine blade ...
Lei WANG   +4 more
doaj   +1 more source

A polymer tandem solar cell with 10.6% power conversion efficiency

open access: yesNature Communications, 2013
An effective way to improve polymer solar cell efficiency is to use a tandem structure, as a broader part of the spectrum of solar radiation is used and the thermalization loss of photon energy is minimized.
Jingbi You   +10 more
semanticscholar   +1 more source

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

open access: yesJournal of Electrical and Computer Engineering, 2018
In the grid-connected inverter based on the deadbeat current control, the filter inductance variation and single update PWM affect the distortion of the grid current, stability, and dynamic of the system.
Ling Yang   +8 more
doaj   +1 more source

Electrochemical Behavior and Passive Film Properties of Hastelloy C22 Alloy, Laser-Cladding C22 Coating, and Ti–6Al–4V Alloy in Sulfuric Acid Dew-Point Corrosion Environment

open access: yesMetals, 2022
The electrochemical behavior and passive film properties of Hastelloy C22 alloy, laser-cladding C22 coating, and Ti–6Al–4V alloy in sulfuric acid dew-point corrosion environment were investigated through a combination of electrochemical measurements and ...
Chao Zheng   +5 more
doaj   +1 more source

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