Results 351 to 360 of about 3,226,193 (375)

Optimal Configuration of Finite Source Heat Engine Cycle for Maximum Output Work with Complex Heat Transfer Law

Journal of Non-Equilibrium Thermodynamics, 2022
A finite source heat engine’s optimal configuration is studied. The model includes thermal resistance, heat leakage, a complex heat transfer law, and a heat source with variable temperature.
Jun Li, Lingen Chen
semanticscholar   +1 more source

Heat Engine Cycle Configurations for Maximum Work Output with Generalized Models of Reservoir Thermal Capacity and Heat Resistance

Journal of Non-Equilibrium Thermodynamics, 2022
A class of two finite-heat-reservoir endoreversible heat engine with the generalized models of both the reservoir thermal capacities and heat resistances is investigated.
Lingen Chen, Shaojun Xia
semanticscholar   +1 more source

Poleward heat transport by the atmospheric heat engine

Nature, 2002
The atmospheric heat transport on Earth from the Equator to the poles is largely carried out by the mid-latitude storms. However, there is no satisfactory theory to describe this fundamental feature of the Earth's climate. Previous studies have characterized the poleward heat transport as a diffusion by eddies of specified horizontal length and ...
George C. Craig, John Thuburn, Leon Barry   +2 more
openaire   +3 more sources

A quantum-dot heat engine operating close to the thermodynamic efficiency limits

Nature Nanotechnology, 2017
Cyclical heat engines are a paradigm of classical thermodynamics, but are impractical for miniaturization because they rely on moving parts. A more recent concept is particle-exchange (PE) heat engines, which uses energy filtering to control a thermally ...
M. Josefsson, Artis Svilans, A. Burke, E. Hoffmann, S. Fahlvik, C. Thelander, M. Leijnse, H. Linke   +7 more
semanticscholar   +1 more source

A thermophotonic heat pump/heat engine

MRS Proceedings, 2009
AbstractWe propose a solid state heat pump based on photon assisted heat transfer between two large-area light emitting diodes coupled by the electromagnetic field and enclosed in a semiconductor structure with a nearly homogeneous refractive index. Ideally the thermophotonic heat pump (THP) allows heat transfer and electricity generation at the Carnot
Jani Oksanen, Jukka Tulkki
openaire   +2 more sources

Heat Engines and the Caloric Theory of Heat [PDF]

, 1996
This chapter will present an alternative route to the thermodynamics of simple fluids at a slightly higher mathematical level, allowing for a generalization of the subject of thermodynamics of uniform fluids. The most important difference to the previous development has to do with what we assume to know about the nature of heat.
openaire   +1 more source

Plasma heat pump and heat engine

Physics of Plasmas, 2010
A model system where cold charged particles are locally confined in a volume VP within a warm plasma of volume V (VP⪡V) is studied. Charged particles mutually repel via a shielded repulsion which is like an effective pressure, i.e., electrostatic pressure PE. The law of thermodynamics involving PE and an equation of state for PE are obtained.
openaire   +2 more sources

Colloidal heat engines: a review

Soft Matter, 2017
Stochastic heat engines can be built using colloidal particles trapped using optical tweezers. Here we review recent experimental realizations of microscopic heat engines. We first revisit the theoretical framework of stochastic thermodynamics that allows to describe the fluctuating behavior of the energy fluxes that occur at mesoscopic scales, and ...
Martinez, I., Roldan, E., Dinis, L., Rica, R.   +3 more
openaire   +4 more sources

Maximum power and corresponding efficiency of an irreversible blue heat engine for harnessing waste heat and salinity gradient energy

Science China Technological Sciences, 2021
Jian Lin, Shan Xie, Chen Jiang, Yifei Sun, Jincan Chen, Yingru Zhao   +5 more
semanticscholar   +1 more source

Electrochemical Heat Engines

ECS Transactions, 2015
This brief thermodynamic analysis theoretically explores the potential of using a solid-state electrochemical heat engine (EHE) to continually harvest waste heat from available thermal energy from natural and man-made sources. These EHE systems are composed of a fuel cell hybrid (FCH) and an electrolyer hybrid (EH) which is composed of fuel cells ...
George A. Richards, Mark C. Williams, Randall S. Gemmen   +2 more
openaire   +2 more sources