Results 121 to 130 of about 1,569 (175)

Carnot Cycle Diagrams

American Journal of Physics, 1966
A number of interesting sketches of the Carnot cycle (operated as a heat engine and with an ideal gas as the working substance) are presented. Heat and work are used as the coordinates in addition to several thermodynamic variables (P, V, T, E, H, S, G, and A).
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Carnot’s Cycle

2015
How might a heat engine attain the highest possible efficiency? Does a heat-engine’s efficiency depend on its construction? On the type of intermediate substance employed? On the temperature of the boiler? Of the condenser? Carnot argued that all these factors may, in fact, affect the efficiency of a heat-engine.
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Carnot Processes. Carnot Cycles and Webs. Lemmas regarding Heat and Work for Cycles in a Carnot Web

1977
A cyclic process for which neither 풯+ nor 풯− is empty is a Carnot process if there are constant temperatures θ+ and θ−, called the operating temperatures of the process, such that $$\begin{array}{*{20}c} {\theta = \theta ^ + onTscr^ + ,} \\ {\theta = \theta ^ - < \theta ^ + onTscr^ - } \\ \end{array} $$ (7.1) .
Clifford Ambrose Truesdell, Subramanyam Bharatha   +1 more
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Classes of Carnot Cycles

American Journal of Physics, 1963
The heat Q2 exchanged with the high-temperature reservoir and the heat Q1 exchanged with the low-temperature reservoir identify each Carnot cycle with a single point on the heat exchange plane, the Q2−Q1 plane. The axes and the zero work line divide this plane into half-planes whose physical interpretation is described with the aid of the laws of ...
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Equivalent Carnot cycles for sorption refrigeration

International Journal of Refrigeration, 1998
Abstract Temperature–entropy diagrams are usually used to describe heat-driven engines as well as vapour compressor refrigerators, but they have not yet been used for sorption refrigeration. Such Carnot cycles are introduced here to describe three sorption refrigeration technologies (liquid absorption, solid adsorption, chemical reaction).
F. Meunier, P. Neveu, J. Castaing-Lasvignottes   +2 more
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Carnot cycle for photon gas?

American Journal of Physics, 2001
The Carnot cycle for a photon gas provides a useful means to illustrate the thermodynamic laws. It is particularly useful in showing the path dependence of thermodynamic functions. Thermodynamic relationships to a neutrino gas are also drawn.
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Golden section in the Carnot cycle

Physics-Uspekhi, 2000
Some aspects of classical thermodynamics are analyzed for the presence of duality and of the golden section.
Valerian V. Popkov, Evgenii V. Shipitsyn
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Statistical mechanics of self-driven Carnot cycles

Physical Review E, 1999
The spontaneous generation and finite-amplitude saturation of sound, in a traveling-wave thermoacoustic engine, are derived as properties of a second-order phase transition. It has previously been argued that this dynamical phase transition, called "onset," has an equivalent equilibrium representation, but the saturation mechanism and scaling were not ...
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Thermodynamics of natural selection II: Chemical Carnot cycles

Journal of Theoretical Biology, 2008
This is the second in a series of three papers devoted to energy flow and entropy changes in chemical and biological processes, and to their relations to the thermodynamics of computation. In the first paper of the series, it was shown that a general-form dimensional argument from the second law of thermodynamics captures a number of scaling relations ...
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Quantum Equivalent of the Carnot Cycle

Physical Review, 1967
The concept of a quantum heat pump is proposed as a convenient model in the thermodynamic interpretation of certain multilevel processes. The ideal quantum heat engine is defined as an idealization of realistic pumped multilevel systems in much the same way that the well-known Carnot cycle is an idealization of physically realizable, classical ...
J. E. Geusic, E. O. Schulz-DuBios, H. E. D. Scovil   +2 more
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