Results 21 to 30 of about 432,284 (250)

Application of Stirling Engine Type Alpha Powered by the Recovery Energy on Vessels

open access: yesPolish Maritime Research, 2020
The Stirling engine is a device in which thermal energy is transformed into mechanical energy without any contact between the heat carrier and the working gas enclosed in the engine. The mentioned feature makes this type of engine very attractive for the
Kropiwnicki Jacek
doaj   +1 more source

Traveling-wave thermoacoustic refrigerator with curved and tapered surfaces to minimize streaming

open access: yesInvention Disclosure, 2022
The present article describes a traveling-wave thermoacoustic refrigeration system driven by a thermoacoustic heat engine. The coupled engine-refrigerator system consists of a resonator tube, which the thermoacoustic engine and thermoacoustic ...
Mohsen Bahrami, Fathollah Ommi
doaj   +1 more source

Performance of discrete heat engines and heat pumps in finite time [PDF]

open access: yes, 2000
The performance in finite time of a discrete heat engine with internal friction is analyzed. The working fluid of the engine is composed of an ensemble of noninteracting two level systems.
A. Bejan   +35 more
core   +3 more sources

Isolated quantum heat engine

open access: yes, 2012
We present a theoretical and numerical analysis of a quantum system that is capable of functioning as a heat engine. This system could be realized experimentally using cold bosonic atoms confined to a double well potential that is created by splitting a ...
Fialko, O., Hallwood, D.
core   +1 more source

Quantum Thermodynamic Cycles and quantum heat engines [PDF]

open access: yes, 2006
In order to describe quantum heat engines, here we systematically study isothermal and isochoric processes for quantum thermodynamic cycles. Based on these results the quantum versions of both the Carnot heat engine and the Otto heat engine are defined ...
C. H. Bennett   +15 more
core   +2 more sources

An Available Method Utilizing the Waste Heat in a Direct Carbon Fuel Cell

open access: yesInternational Journal of Electrochemical Science, 2014
A new hybrid system is established to utilize the waste heat generated in a DCFC (direct carbon fuel cell). The hybrid system mainly consists of a DCFC with molten carbonate as electrolyte, a regenerator and a Carnot heat engine, where the Carnot heat ...
Liwei Chen, Houcheng Zhang, Songhua Gao
doaj   +1 more source

General Thermodynamic Properties of FRW Universe and Heat Engine

open access: yesUniverse, 2022
In this work, the Friedmann–Robertson–Walker (FRW) Universe is considered a thermodynamic system, where the cosmological constant generates the thermodynamic pressure.
Ujjal Debnath
doaj   +1 more source

Verification of ignition energy time distribution control for a diluted combustion engine

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Several high energy ignitions have been proposed to improve ignition performance of diluted combustion recently. One of the major issues in the high energy ignition systems is heat generation of an ignition coil due to increase of power consumption. This
Eiichiro OHATA, Kazuhiro ORYOJI
doaj   +1 more source

Dissipative heat engine is thermodynamically inconsistent

open access: yes, 2009
A heat engine operating on the basis of the Carnot cycle is considered, where the mechanical work performed is dissipated within the engine at the temperature of the warmer isotherm and the resulting heat is added to the engine together with an external ...
Gorshkov, V. G., Makarieva, A. M.
core   +1 more source

Holographic heat engine within the framework of massive gravity

open access: yesJournal of High Energy Physics, 2018
Heat engine models are constructed within the framework of massive gravity in this paper. For the four-dimensional charged black holes in massive gravity, it is shown that the existence of graviton mass improves the heat engine efficiency significantly ...
Jie-Xiong Mo, Gu-Qiang Li
doaj   +1 more source

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