Results 1 to 10 of about 1,832,525 (231)
Hidden heat transfer in equilibrium states implies directed motion in nonequilibrium states [PDF]
Phys. Rev. E 73, 065107(R) (2006), 2005 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. We measure heat transfer from each heat bath separately, and average them using a careful procedure that reveals the nature of the heat transfer associated with directed steps of the ...
Naoko Nakagawa +4 more
arxiv +3 more sources
Near-field radiative heat transfer between macroscopic planar surfaces [PDF]
, 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. Although heat transfer via near-field effects has been discussed for many years, experimental verification of this theory has been very limited.
A. A. Alemi +9 more
arxiv +5 more sources
Time-modulated near-field radiative heat transfer. [PDF]
Proc 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
Thermodynamic Analysis and Optimization Design of a Molten Salt–Supercritical CO2 Heat Exchanger
Energies, 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
Energies, 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
Energies, 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
Energies, 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
Applied 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
Applied 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
Energies, 2022 Working fluid selection is crucial for organic Rankine cycles (ORC). In this study, the relationship between molecular structure and ORC performance was established based on the quantitative structure–property relationship (QSPR) and working fluid ...
Yachao Pan +6 more
doaj +1 more source