Influence of quantum degeneracy on the performance of a gas Stirling engine cycle |
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Authors: | He Ji-Zhou Mao Zhi-Yuan and Wang Jian-Hui |
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Institution: | Department of Physics, Nanchang University, Nanchang 330047, China |
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Abstract: | Based on the state equation of an ideal quantum gas, the regenerative loss of a
Stirling engine cycle working with an ideal quantum gas is calculated. Thermal
efficiency of the cycle is derived. Furthermore, under the condition of quantum
degeneracy, several special thermal efficiencies are discussed. Ratios of thermal
efficiencies versus the temperature ratio and volume ratio of the cycle are made. It
is found that the thermal efficiency of the cycle not only depends on high and low
temperatures but also on maximum and minimum volumes. In a classical gas state
the thermal efficiency of the cycle is equal to that of the Carnot cycle. In an ideal
quantum gas state the thermal efficiency of the cycle is smaller than that of the
Carnot cycle. This will be significant for deeper understanding of the gas Stirling
engine cycle. |
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Keywords: | Stirling engine cycle ideal quantum gas regenerative characteristics thermal efficiency |
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