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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >General performance characteristics of a quantum heat pump cycle using harmonic oscillators as the working substance
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General performance characteristics of a quantum heat pump cycle using harmonic oscillators as the working substance

机译：使用谐波振荡器作为工作物质的量子热泵循环的一般性能特征

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摘要

The cycle model of a regenerative quantum heat pump working with many non-interacting harmonic oscillators is established. The cycle consists of two isothermal and two constant-frequency processes. The general performance characteristics of the cycle are investigated, based on the quantum master equation and semi-group approach. Expressions for some important performance parameters, such as the heating load, coefficient of performance, power input, and rate of the entropy production, are derived. Some interesting cases are discussed. Especially, the optimal performance of the cycle in the high-temperature limit is discussed in detail. Some important characteristic curves of the cycle, such as the heating load versus the coefficient of performance, the power input versus the coefficient of performance, the entropy production rate versus the coefficient of performance, and so on, are presented. The maximum heating load and the corresponding coefficient of performance are calculated. Moreover, the optimal power input, cycle time and temperatures of the working substance in the isothermal processes are analyzed. The optimal region of the coefficient of performance and the optimal ranges of the temperatures of the working substance in the two isothermal processes are determined. In addition. it is proved that the results obtained here can he directly used to derive the optimal performance of a harmonic quantum Carnot heat pump.
机译：建立了具有许多非相互作用谐波振荡器的再生量子热泵的循环模型。该循环包括两个等温过程和两个恒定频率过程。基于量子主方程和半群方法，研究了循环的一般性能特征。得出了一些重要性能参数的表达式，例如热负荷，性能系数，功率输入和熵产生率。讨论了一些有趣的情况。特别是，详细讨论了在高温极限下的最佳循环性能。给出了循环的一些重要特征曲线，例如加热负载与性能系数，功率输入与性能系数，熵生产率与性能系数等，等等。计算出最大加热负荷和相应的性能系数。此外，还分析了等温过程中的最佳功率输入，循环时间和工作物质的温度。确定了两个等温过程中性能系数的最佳区域和工作物质的温度的最佳范围。此外。事实证明，此处获得的结果可直接用于推导谐波量子卡诺热泵的最佳性能。

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