Coherent magneto-caloric effect superconductive heat engine process cycle

Keefe, Peter D.

doi:10.1080/09500340308233575

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…During this period, more than 50 papers have appeared in the refereed scientific literature (see, for example, Refs. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]), together with a monograph entirely devoted to this subject [21]. Moreover, during the same period two international conferences on the limit of the Second Law were also held [22,23].…”

Section: Introductionmentioning

confidence: 98%

On the exploitability of thermo-charged capacitors

D’Abramo

2011

Physica A: Statistical Mechanics and its Applications

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Recently [Physics Letters A, 374, (2010) 1801] the concept of vacuum capacitor spontaneously charged harnessing the heat from a single thermal reservoir at room temperature has been introduced, along with a mathematical description of its functioning and a discussion on the main paradoxical feature that seems to violate the Second Law of Thermodynamics. In the present paper we investigate the theoretical and practical possibility of exploiting a such thermo-charged capacitor as voltage/current generator: we show that if very weak provisos on the physical characteristics of the capacitor are fulfilled, then a non-zero current should flow across the device, allowing the generation of potentially usable voltage, current and electric power out of a single thermal source at room temperature. Preliminary results show that the power output is tiny but non-zero.Comment: 23 Pages, 10 Figures. Physica A 390/6 (2011) 482 + Addendum (2013

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Section: Introductionmentioning

confidence: 98%

On the exploitability of thermo-charged capacitors

D’Abramo

2011

Physica A: Statistical Mechanics and its Applications

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“…Other process cycles are possible [12]: a "Coherent Magneto-Caloric Demagnetization" process cycle, which involves an initial phase transition from the normal phase to the superconductive phase; and an "Enhanced Coherent Magneto-Caloric Demagnetization" process cycle, which further involves the heat influx being supplied at all times during the process cycle.…”

Section: Possible Process Cyclesmentioning

confidence: 99%

Superconductor Particles As The Working Media Of A Heat Engine

Keefe¹

2011

AIP Conference Proceedings

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“…Gordon [39][40][41][42] and J. Denur [43][44][45][46]. By the mid-1990s, the number and variety of challenges mushroomed as multiple research teams entered the field, includingČápek et al [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61], Allahverdyan and Nieuwenhuizen [62][63][64][65][66], Berger [67,68], Crosignani et al [69][70][71][72][73], Keefe [74][75][76], Nikulov and Dubonos et al [77][78][79], and Miller [80]. During the last 20 years, more than a half-dozen challenges have been investigated at University of San Diego (USD), covering the fields of plasma, chemical, gravitational, biological and solid state physics [9][10][11][81]…”

Section: Second Law Challengesmentioning

confidence: 99%

“…Some experimentally-testable challenges have had laboratory corroboration of their underlying physical processes [74][75][76][77][78][79][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96].…”

Section: Second Law Challengesmentioning

confidence: 99%

Infrared Cloaking, Stealth, and the Second Law of Thermodynamics

Sheehan

2012

Entropy

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Infrared signature management (IRSM) has been a primary aeronautical concern for over 50 years. Most strategies and technologies are limited by the second law of thermodynamics. In this article, IRSM is considered in light of theoretical developments over the last 15 years that have put the absolute status of the second law into doubt and that might open the door to a new class of broadband IR stealth and cloaking techniques. Following a brief overview of IRSM and its current thermodynamic limitations, theoretical and experimental challenges to the second law are reviewed. One proposal is treated in detail: a high power density, solid-state power source to convert thermal energy into electrical or chemical energy. Next, second-law based infrared signature management (SL-IRSM) strategies are considered for two representative military scenarios: an underground installation and a SL-based jet engine. It is found that SL-IRSM could be technologically disruptive across the full spectrum of IRSM modalities, including camouflage, surveillance, night vision, target acquisition, tracking, and homing.

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Coherent magneto-caloric effect superconductive heat engine process cycle

Cited by 9 publications

References 13 publications

On the exploitability of thermo-charged capacitors

On the exploitability of thermo-charged capacitors

Superconductor Particles As The Working Media Of A Heat Engine

Infrared Cloaking, Stealth, and the Second Law of Thermodynamics

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