科研之友
微信
新浪微博
Facebook
分享链接
摘要
It is well known that heat pumps, while being all limited by the same basic thermodynamic laws, may find realization on systems as %26quot;small%26quot; and %26quot;quantum%26quot; as a three-level maser. In order to quantitatively assess how the performance of these devices scales with their size, we design generalized N-dimensional ideal heat pumps by merging N - 2 elementary three-level stages. We set them to operate in the absorption chiller mode between given hot and cold baths and study their maximum achievable cooling power and the corresponding efficiency as a function of N. While the efficiency at maximum power is roughly size-independent, the power itself slightly increases with the dimension, quickly saturating to a constant. Thus, interestingly, scaling up autonomous quantum heat pumps does not render a significant enhancement beyond the optimal double-stage configuration.
- 出版日期2014-4-16
