Electrical Output of Efficient Cylindrical Thermionic Energy Converters as a Function of Interelectrode Spacing and Emitter Work Function in Vacuum

1999 ◽  
Author(s):  
Arnold G. Kalandarishvili ◽  
Boris I. Yermilov
Keyword(s):  
Work Function ◽  
Interelectrode Spacing ◽  
Thermionic Energy ◽  
Electrical Output ◽  
Energy Converters

Synthesis and characterization of low work function alkali oxide thin films for unconventional thermionic energy converters

2016 ◽  
Vol 120 (20) ◽  
pp. 205108 ◽  
Author(s):  
V. Giorgis ◽  
F. Morini ◽  
T. Zhu ◽  
J.-F. Robillard ◽  
X. Wallart ◽  
...  
Keyword(s):  
Thin Films ◽  
Work Function ◽  
Synthesis And Characterization ◽  
Alkali Oxide ◽  
Oxide Thin Films ◽  
Thermionic Energy ◽  
Energy Converters

Work Function of NiW Alloys for Use in Thermionic Energy Converters

2015 ◽  
Vol 833 ◽  
pp. 71-74
Author(s):  
Nashun ◽  
Shinya Kawata ◽  
Kentaro Iwami ◽  
Norihiro Umeda
Keyword(s):  
Heat Treatment ◽  
Work Function ◽  
Material Properties ◽  
Vacuum Chamber ◽  
Alloy Films ◽  
Electron Yield ◽  
Work Functions ◽  
Surface Morphologies ◽  
Thermionic Energy ◽  
Energy Converters

The material properties of electroplated NiW alloys with potential for use as emitters in thermionic energy converters were investigated. NiW alloy films with W content ranging from 11 to 25 at% were electroplated and the material properties of the alloy films including their surface morphologies, and crystallinities, were determined. The work functions of the NiW films were also evaluated using photoemission yield spectroscopy and were found to be independent of the W content. In addition, heat treatment up to 700°C in a vacuum chamber of a NiW film with 21.4 at% W content decreased the electron yield with increasing its work function.

Electrical output parameters of efficient cylindrical thermionic energy converters

Atomic Energy ◽  
1999 ◽  
Vol 87 (2) ◽  
pp. 577-582
Author(s):  
A. G. Kalandarishvili ◽  
V. Z. Kaibyshev ◽  
A. V. Lysikov ◽  
B. I. Ermilov
Keyword(s):  
Thermionic Energy ◽  
Electrical Output ◽  
Energy Converters

scholarly journals Surface Photovoltage-Induced Ultralow Work Function Material for Thermionic Energy Converters

2019 ◽  
Vol 4 (10) ◽  
pp. 2436-2443 ◽  
Author(s):  
Peter Schindler ◽  
Daniel C. Riley ◽  
Igor Bargatin ◽  
Kunal Sahasrabuddhe ◽  
Jared W. Schwede ◽  
...  
Keyword(s):  
Work Function ◽  
Surface Photovoltage ◽  
Thermionic Energy ◽  
Energy Converters

scholarly journals Analysis of the Thermodynamic Consistency of the Richardson–Duhmann Model for Thermionic Converters

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1087
Author(s):  
Antonio Martí
Keyword(s):  
General Theory ◽  
Entropy Generation ◽  
Thermodynamic Consistency ◽  
Generation Rate ◽  
Entropy Generation Rate ◽  
Thermionic Energy ◽  
Energy Converters

In this work, we develop the general theory for analyzing the thermodynamic consistency of the Richardson–Duhmann model for vacuum thermionic energy converters. In addition to the electron fluxes from emitter to collector and vice versa, we calculate the energy and entropy fluxes associated to them. The calculation of the entropy fluxes is what allows us to conclude that the model is consistent by verifying that both at the emitter and at the collector the entropy generation rate is positive. In the process, we review the Richardson–Duhmann model in order to assure that the assumptions we make for calculating the energy and entropy fluxes are consistent. We also generalize the Richardson–Duhmann model in order to consider Fermi–Dirac statistics.

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