Efficient segmented thermoelectric unicouples for space power applications

El‐Genk, Mohamed S.; Saber, Hamed H.; Caillat, T.

doi:10.1016/s0196-8904(02)00217-0

Cited by 117 publications

(61 citation statements)

References 3 publications

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“…Commercial devices are available for up to 230 °C (200 °C for maximum reliability) on the hot side with approximately 5% conversion efficiency, equating to a ZT of approximately 0.5 (26). Higher temperature and higher zT materials have been demonstrated within the research and development (R&D) community, for example, skutterudite materials have the potential to produce 14.7% efficiency at 700 °C with a 27 °C cold side temperature, equating to approximately a ZT = 0.75 (27). Note that the view factor for the thermophotovoltaic is assumed to be 1 (see figure 9).…”

Section: Thermophotovoltaic and Thermoelectric Conversion Efficiency mentioning

confidence: 99%

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Thermophotovoltaic Energy Conversion for Personal Power Sources

Waits¹

2012

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Section: Thermophotovoltaic and Thermoelectric Conversion Efficiency mentioning

confidence: 99%

“…Heat useful for power generation from a TEC system can come from numerous sources including solar (39), combustion, or radioisotope (27) and highly depends on the intended application of the power source.…”

Section: Heat Sourcementioning

confidence: 99%

Thermophotovoltaic Energy Conversion for Personal Power Sources

Waits¹

2012

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“…Over a temperature range of 300-973 K, C et al [6] developed a segmented TED and obtained a conversion efficiency of 15%. Moreover, for T h = 973 K and T c = 300 K, El-Genk et al [7] showed a peak conversion efficiencies of 16.69% and 7.4% for skutterudite and SiGe segmented thermoelectric generators, respectively. Crane and Lagrandeur [8] also recently investigated the segmented TEDs in automotive waste heat recovery systems and achieved a power output of 125W operating at inlet exhaust gas temperature of 650ºC.…”

Section: Introductionmentioning

confidence: 99%

“…With the present thermoelectric materials having figures of merit ZT≈1.5, the conversion efficiencies 5-10% in power generation can be achieved. However, an increase in efficiency for direct heat-to-electricity are sought through the methods of nanostructuring and fabrication [2,3], novel bulk designs such as cascading [4], multistage [5] and segmented [6][7][8] TEDs and use of new materials [1].…”

Section: Introductionmentioning

confidence: 99%

Enhanced heat transfer characteristics and performance of composite thermoelectric devices

Chyu

Reddy

Barry

et al. 2012

Advanced Computational Methods and Experiments in Heat Transfer XII

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Thermoelectric elements made of semiconductor slices layered onto highly conducting inter-connector materials are termed as Composite Thermoelectric Device (CTED). An integrated TED (iTED) is a CTED with flow channels drilled through an inter-connector, it acts as a heat exchanger, directing the heat transfer between the fluid stream and element legs. In this work, thermoelectric performance of such elements in terms of power output P 0 , heat input Q h , conversion efficiency η, electric current and Ohmic and Seebeck voltages for various hot surface temperatures T h , load resistances R L and semiconductor slice sizes d has been investigated using both analytical and numerical methods. The thermoelectric performance of CTED has been compared with a geometrically equivalent conventional TED element. For an optimum load resistance R optmL , an increase in T h showed a substantial increase in P 0 and a minor increase in Q h . At T h = 550K and 350 K, the optimum η for CTED, 11% and 9% respectively lesser and nearly four-fold increase in P 0 as compared to the conventional TED is observed. The semiconductor slice size d has a significant effect on the CTED performance: an observed increase in both P 0 and Q h and decrease in η is a result of decreasing d. At fixed d = 5 mm and hot stream inlet temperature (450 K) values, the single-stage iTED showed five-times in P 0 and two-fold in η for a flow rate Re = 500 compared to the values at Re = 100. These novel TEDs help extract larger amounts of waste heat, reduce thermal stresses and minimize semiconductor material usage as compared to conventional TEDs.

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“…Thereby Mg2X based thermoelectric materials have gained wide attention of researchers, and has been referred to as a new type of semiconductor material environment [2][3][4]. Additionally, on account of its low density and light weight, Mg2X alloy have an indispensable application value in the aerospace and automotive fields [5][6][7]. However, because of its lack of performance, such a magnesium alloy has been limited in the application process.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Thermodynatic Performances of Mg2Sn Compound via First Principle Calculations

Li¹,

Zhang²,

Kong³

et al. 2016

IJHT

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Thermodynamic performances of Mg2Sn metal compounds were calculated by first principle calculations. This study, based on density functional theory, calculated lattice constants, band structure and elastic constants to detail the thermal stability of Mg2Sn structures, and then focused on the phonon density of states, constant volume and Debye temperature to deal with thermodynamic properties. Additionally, the calculations were compared with available experimental value and previous theoretical data, and a favorable result has been obtained in the work. Furthermore, the results manifested that Mg2Sn has better capability when adding the alloying element Sn into Mg alloys, and demonstrated that quasi-harmonic Debye model with first-principles is an efficient approach to study the behavior of intermetallic compounds, which provided more valuable instructional information for the design and application of Mg2Sn compounds.

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Efficient segmented thermoelectric unicouples for space power applications

Cited by 117 publications

References 3 publications

Thermophotovoltaic Energy Conversion for Personal Power Sources

Thermophotovoltaic Energy Conversion for Personal Power Sources

Enhanced heat transfer characteristics and performance of composite thermoelectric devices

Investigation on Thermodynatic Performances of Mg2Sn Compound via First Principle Calculations

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