Engineering:Isothermal technology

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Isothermal technology is a type of heat transfer technology, where the heat transport is mainly via thermal waves/resonances, and achieve to transfer heat isothermally.

Overview

The fundamental modes of heat transfer are conduction, convection and radiation. These are temperature-gradient-driving heat transfer.

The driving force for heat transfer can also be indirect. It comes from cross-couplings among different transport processes and transfer heat isothermally in thermal waves/resonances. It can be in various forms and tuned precisely via manipulating the cross coupling.[1][2]

Typically, many transport processes like thermal, mass, electrical, magnetic transport occur simultaneously in fluids.[3] These processes may couple (or interfere) and cause new induced effects of flows occurring without or against its primary thermodynamic driving force, which may be a temperature gradient, chemical potential, or reaction affinity.[4][5] Two classical examples of coupled transports are the Soret effect (also known as thermodiffusion) and Dufour effect.

Multiphase fluid can be specially designed for inducing the strong cross-coupling among transport processes, and create tailor-designed thermal waves/resonances for the isothermal heat transfer.

References

  1. Wang L. Q., Zhou X. S. and Wei X. H. 2008, Heat Conduction: Mathematical Models and Analytical Solutions, Springer-Verlag, Heidelberg, 515p, ISBN:978-3-540-74028-5.
  2. Tzou D. Y. 2014, Macro-to Microscale Heat Transfer: The Lagging Behavior, 2nd Edition, John Wiley & Sons, Washington, 576p, ISBN:978-1-118-81822-0.
  3. http://idea.cas.cn
  4. Xu M. T. and Wang L. Q. 2002, Thermal oscillation and resonance in dual-phase-lagging heat conduction, International Journal of Heat and Mass Transfer 45, 1055–1061.
  5. Wang L. Q. and Wei X. H. 2009, Nanofluids: synthesis, heat conduction, and extension, Journal of Heat Transfer 131, 033102