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Radiative Heat Shuttling.

Ivan Latella1, Riccardo Messina2, J Miguel Rubi3

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Summary
This summary is machine-generated.

We discovered a "shuttling effect" that enhances radiative heat flux between objects in a vacuum. This effect can also insulate objects when systems have negative differential thermal resistance, enabling active heat management.

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Area of Science:

  • Thermodynamics
  • Quantum optics
  • Nanoscale heat transfer

Background:

  • Radiative heat transfer between objects separated by vacuum is governed by classical and quantum effects.
  • Understanding heat flux modulation is crucial for thermal management in various applications.
  • Non-equilibrium systems offer unique opportunities for controlling energy transfer.

Purpose of the Study:

  • To demonstrate and analyze the shuttling effect in radiative heat flux.
  • To investigate how modulation of photon chemical potential or temperature difference impacts heat exchange.
  • To explore the potential for active management of radiative heat transfer.

Main Methods:

  • Theoretical analysis of radiative heat flux between two bodies in a vacuum gap.
  • Modulation of photon chemical potential and temperature difference.
  • Investigation of systems with negative differential thermal resistance.

Main Results:

  • Demonstrated a shuttling effect enhancing radiative heat flux via modulation.
  • Observed a supplementary flux superimposed on the mean gradient flux.
  • Showed that negative differential thermal resistance leads to insulation instead of enhancement.
  • Identified conditions for both enhanced heat exchange and thermal insulation.

Conclusions:

  • The shuttling effect provides a novel mechanism for active control of radiative heat transfer.
  • Modulation strategies can be employed to either enhance or reduce heat exchange.
  • This research opens new avenues for designing advanced thermal management systems in non-equilibrium conditions.