Results 1 to 10 of about 6,408,928 (419)

Time-modulated near-field radiative heat transfer. [PDF]

open access: yesProc Natl Acad Sci U S A, 2023
We explore near-field radiative heat transfer between two bodies under time modulation by developing a rigorous fluctuational electrodynamics formalism. We demonstrate that time modulation can results in the enhancement, suppression, elimination, or reversal of radiative heat flow between the two bodies, and can be used to create a radiative thermal ...
Yu R, Fan S.
europepmc   +2 more sources

Hidden heat transfer in equilibrium states implies directed motion in nonequilibrium states [PDF]

open access: yesPhys. Rev. E 73, 065107(R) (2006), 2006
We study a class of heat engines including Feynman's ratchet, which exhibits a directed motion of a particle in nonequilibrium steady states maintained by two heat baths.
Naoko Nakagawa   +4 more
core   +2 more sources

Near-field radiative heat transfer between macroscopic planar surfaces [PDF]

open access: yes, 2011
Near-field radiative heat transfer allows heat to propagate across a small vacuum gap in quantities that are several orders of magnitude greater then the heat transfer by far-field, blackbody radiation.
A. A. Alemi   +9 more
core   +4 more sources

Thermodynamic Analysis and Optimization Design of a Molten Salt–Supercritical CO2 Heat Exchanger

open access: yesEnergies, 2022
The performance of a heat exchanger is directly related to the energy conversion efficiency of the thermal storage system, and its optimal design is an important method to improve the performance of the heat exchanger.
Xiaoming Dong   +4 more
doaj   +1 more source

Composite Liquid Biofuels for Power Plants and Engines: Review

open access: yesEnergies, 2023
The problems of environmental pollution caused by the operation of power plants and engines motivate researchers to develop new biofuels. The environmental aspect of composite biofuels appears to have great potential because of the carbon neutrality of ...
Genii Kuznetsov   +5 more
doaj   +1 more source

Prospects for the Use of Metal Surfaces Modified by Nanosecond Laser Radiation for Energy Applications

open access: yesEnergies, 2023
Laser technologies for processing metals used as heat exchange surfaces are unrivaled to solve a number of problems in the energy industry. This is explained by the fact that after laser radiation treatment, metal surfaces gain unique surface functional ...
Dmitriy Glushkov   +5 more
doaj   +1 more source

Effect of Liquid Properties on the Characteristics of Collisions between Droplets and Solid Particles

open access: yesApplied Sciences, 2022
The characteristics of the collisions of droplets with solid particles (52,100 steel) were experimentally studied when varying the key liquid properties: viscosity (1–6.3 mPa·s), surface tension (72.69–36.1 mN/m) and interfacial (liquid-liquid) tension ...
Anastasia Islamova   +3 more
doaj   +1 more source

Experimental Research on Performance Comparison of Compressed Air Engine under Different Operation Modes

open access: yesEnergies, 2023
An air-powered vehicle is a low-cost method to achieve low-pollution transportation, and compressed air engines (CAE) have become a research hotspot for their compact structure, low consumption, and wide working conditions.
Jia Liang   +7 more
doaj   +1 more source

Comprehensive Performance Assessment of Dual Loop Organic Rankine Cycle (DORC) for CNG Engine: Energy, Thermoeconomic and Environment

open access: yesEnergies, 2022
The improvement of the overall utilization rate of compressed natural gas (CNG) engine fuel is the basis of efficient energy utilization. On the foundation of heat balance theory of internal combustion engines, this study fully considers the operation ...
Xu Ping   +7 more
doaj   +1 more source

Experimental Research of the Initial Temperature and Additives Effect on the Ignition and Combustion Mechanisms of Composite Liquid Fuel in a High-Temperature Oxidizer

open access: yesApplied Sciences, 2023
Composite fuel is a promising energy source that allows for solving the problems of waste disposal with energy generation. Such fuel is the most accessible fuel and is cheap in comparison with fossil fuels widely used in industrial thermal power ...
Dmitrii Glushkov   +4 more
doaj   +1 more source

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