Onsager symmetry implies that a Brownian motor, driven by a temperature gradient, will also perform a refrigerator function upon loading. We analytically calculate the corresponding heat flux for an exactly solvable microscopic model and compare it with molecular dynamics simulations.
Cite
@article{arxiv.cond-mat/0602153,
title = {Brownian refrigerator},
author = {C. Van den Broeck and R. Kawai},
journal= {arXiv preprint arXiv:cond-mat/0602153},
year = {2007}
}