Heating without heat: Thermodynamics of passive energy filters between finite systems



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Muñoz Tapia, R. and Brito, Ricardo and Rodríguez Parrondo, Juan Manuel (2017) Heating without heat: Thermodynamics of passive energy filters between finite systems. Physical review E, 96 (3). ISSN 2470-0045

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Official URL: http://dx.doi.org/10.1103/PhysRevE.96.030103


Passive filters allowing the exchange of particles in a narrow band of energy are currently used in microrefrigerators and energy transducers. In this Rapid Communication, we analyze their thermal properties using linear irreversible thermodynamics and kinetic theory, and discuss a striking phenomenon: the possibility of simultaneously increasing or decreasing the temperatures of two systems without any supply of energy. This occurs when the filter induces a flow of particles whose energy is between the average energies of the two systems. Here we show that this selective transfer of particles does not need the action of any sort of Maxwell demon and can be carried out by passive filters without compromising the second law of thermodynamics. This phenomenon allows us to design cycles between two reservoirs at temperatures T-1 < T-2 that are able to reach temperatures below T-1 or above T-2.

Item Type:Article
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© 2017 American Physical Society. R.M.T acknowledges Spanish MINECO Grants No. FIS2013-40627-P and No. FIS2016-80681-P (AEI/FEDER, UE), and Generalitat de Catalunya CIRIT 2014-SGR-966. R.B. and J.M.R.P. acknowledge financial support from MINECO Grant No. FIS2014-52486-R.

Uncontrolled Keywords:Physics; Fluids; Plasmas; Mathematical
Subjects:Sciences > Physics > Thermodynamics
ID Code:46099
Deposited On:19 Apr 2018 08:12
Last Modified:10 Dec 2018 14:57

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