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Thermionic refrigerators with non-Richardson current

Journal Article


Abstract


  • Most models of solid-state thermionic devices assume that all electrons with

    energy in the direction of transport greater than the barrier height are

    transmitted and utilize the Richardson equation. Here we consider a number

    of thermionic systems where the electron energy spectrum differs from the

    Richardson model. The electron energy spectra for maximum refrigeration

    coefficient of performance and maximum power are presented. We then

    consider multilayer solid-state nanostructures with currents not given by the

    Richardson equation and discuss the optimization of their energy spectrum.

    Nanometre gap vacuum thermionic refrigerators are also treated, where

    significant current is provided by below the barrier tunnelling. Finally,

    equations are developed for devices that select electrons for emission

    according to their total momentum, rather than simply the value in the

    direction of transport as is the case with conventional devices.

Publication Date


  • 2007

Citation


  • O'Dwyer, M. F., Lewis, R. A. & Zhang, C. (2007). Thermionic refrigerators with non-Richardson current. Journal of Physics D: Applied Physics, 40 (4), 1167-1174.

Scopus Eid


  • 2-s2.0-33947658420

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3327

Number Of Pages


  • 7

Start Page


  • 1167

End Page


  • 1174

Volume


  • 40

Issue


  • 4

Abstract


  • Most models of solid-state thermionic devices assume that all electrons with

    energy in the direction of transport greater than the barrier height are

    transmitted and utilize the Richardson equation. Here we consider a number

    of thermionic systems where the electron energy spectrum differs from the

    Richardson model. The electron energy spectra for maximum refrigeration

    coefficient of performance and maximum power are presented. We then

    consider multilayer solid-state nanostructures with currents not given by the

    Richardson equation and discuss the optimization of their energy spectrum.

    Nanometre gap vacuum thermionic refrigerators are also treated, where

    significant current is provided by below the barrier tunnelling. Finally,

    equations are developed for devices that select electrons for emission

    according to their total momentum, rather than simply the value in the

    direction of transport as is the case with conventional devices.

Publication Date


  • 2007

Citation


  • O'Dwyer, M. F., Lewis, R. A. & Zhang, C. (2007). Thermionic refrigerators with non-Richardson current. Journal of Physics D: Applied Physics, 40 (4), 1167-1174.

Scopus Eid


  • 2-s2.0-33947658420

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3327

Number Of Pages


  • 7

Start Page


  • 1167

End Page


  • 1174

Volume


  • 40

Issue


  • 4