Thermomechanical bistability of phase-transition oscillators driven by near-field heat exchange

This paper presents a new design to convert spacecraft waste heat to electrical energy. The proposed device utilizes near-field radiative heat transfer incorporated with pyroelectric materials. To generate electricity, the pyroelectric materials are cyclically heated using spacecraft waste heat and cooled by the thermal environment of deep space (∼2.7 K). Near-field plane-to-plane radiative heat exchange within the device is calculated using a modified sphere-to-plane asymptotic approximation. This method is superimposed on multiple spheres to approximate a plane-to-plane environment. Silica and lithium fluoride coatings are considered in this study to maximize the near-field heat exchange. The efficiency of the device is 17% and 32% when compared to the Carnot cycle efficiency and the Curzon-Ahlborn efficiency, respectively. Initial results indicate that the device is promising but requires further development before it is manufactured for operational use. Suggestions for possible future developments to enhance the design are presented.

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Phase transition of copper (II) phthalocyanine thin films characterized by a near-field scanning microwave microscope

Thin Solid Films ◽

10.1016/j.tsf.2005.07.119 ◽

2006 ◽

Vol 499 (1-2) ◽

pp. 318-321 ◽

Cited By ~ 4

Author(s):

Miehwa Park ◽

Hyunjun Yoo ◽

Hyungun Yoo ◽

Seungwook Na ◽

Songhui Kim ◽

...

Keyword(s):

Thin Films ◽

Phase Transition ◽

Near Field ◽

Microwave Microscope ◽

Near Field Scanning

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Heat Capacity Study of PMN Near Field—Induced Phase Transition

Ferroelectrics ◽

10.1080/00150190701515964 ◽

2007 ◽

Vol 360 (1) ◽

pp. 37-43 ◽

Cited By ~ 2

Author(s):

M. V. Gorev ◽

V. S. Bondarev ◽

K. S. Aleksandrov

Keyword(s):

Phase Transition ◽

Heat Capacity ◽

Near Field

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Nonsteady-state radiant-conductive heat exchange in a semitransparent medium with phase transition

Journal of Applied Mechanics and Technical Physics ◽

10.1007/bf00918780 ◽

1987 ◽

Vol 28 (1) ◽

pp. 91-93 ◽

Cited By ~ 3

Author(s):

A. L. Burka ◽

N. A. Rubtsov ◽

N. A. Savvinova

Keyword(s):

Phase Transition ◽

Heat Exchange ◽

Conductive Heat ◽

Nonsteady State ◽

Semitransparent Medium

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Lecciones de mecánica de fluidos en el tratado hipocrático Sobre los flatos

Epos Revista de filología ◽

10.5944/epos.28.2012.12260 ◽

2012 ◽

pp. 13

Author(s):

César Sierra Martín

Keyword(s):

Phase Transition ◽

Heat Exchange ◽

Fluid Mechanics ◽

Physical Laws

En el presente trabajo abordaremos el tratado hipocrático Sobre los flatos, conocido por su influencia sofista y vocación retórica. Nuestro objetivo es destacar las analogías y referencias de su autor a leyes y principios físicos como el intercambio de calor, los cambios de estado y la circulación de fluidos. Creemos que todo ello forma parte de la intención de otorgar credibilidad al discurso y a las teorías del autor.This paper is about the Hippocratic treatise On Breaths, characterized by its Sophist influence and its rhetoric vocation. The aim of the article is to highlight the similarities and the references did by the author on physical laws such as heat exchange, phase transition and fluid mechanics. In our opinion this references aimed to reinforce the speech and theories of the author.

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