Results 181 to 190 of about 41,428 (227)

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 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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A new look at the Carnot cycle

Journal of Chemical Education, 1973
Points out that the typical textbook diagram of the Carnot cycle is physically quite unrealistic.
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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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A Carnot Cycle for the Solar Cell

1987
The Carnot cycle of an electron-hole gas, exchanging heat in the form of blackbody radiation with two heat reservoirs, can be easily determined and used to study the thermodynamics of photovoltaic conversion. The thermodynamic efficiency (different from the usual practical efficiency) will be maximum, equal to the Carnot factor, when the evolution of ...
J. E. Parrott, P. Baruch
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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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Optimization of the direct Carnot cycle

Applied Thermal Engineering, 2007
A model for the study and optimization of two heat reservoirs thermal machines is presented. The mathematical model basically consists of the First and Second Laws of Thermodynamics applied to the cycle and entire system, and the heat transfer equations at the source and sink.
S. Petrescu, C. Petre, Michel Feidt, Monica Costea   +3 more
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Comments on the closure of the Carnot cycle

Journal of Chemical Education, 1985
Why did Carnot set up the cycle as he did, and didn't his first commentators adopt his procedure?
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A simple demonstration of the Carnot cycle

Journal of Chemical Education, 1952
This simple demonstration makes use of a stretched rubber band whose temperature changes are noted with the lips.
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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).
Jean Castaing-Lasvignottes, Francis Meunier, Pierre Neveu   +2 more
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