Evaluation of thermoelectric modules for power generation

Rowe, D.M.; Min, Gao

doi:10.1016/s0378-7753(97)02801-2

Cited by 404 publications

(172 citation statements)

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confidence: 91%

“…While the absolute efficiency values still require further improvement, it is worth looking at the specific power output normalized to the active cross-sectional area of both crystals, as depicted on the right ordinate of Figure 4b. This key parameter for cost-per-watt in waste heat recovery [31] reaches values of 9 1 mW/cm 2 at Δ = 30 K being three orders of magnitude larger than those of thermoelectric devices based on polymers [2] .To sum up, organic thermoelectrics composed of crystalline low-dimensional molecular metals present a promising alternative to existing material concepts, especially considering ongoing research to take full control over the amount of charge-transfer and band filling [32] . The peculiar phenomena observed in this material class such as violation of the WF law, the anomalous temperaturedependence of the electrical conductivity or phonon drag effects in the thermopower, will furthermore unlock new possibilities in low-temperature thermoelectrics.…”

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Low‐Cost and Sustainable Organic Thermoelectrics Based on Low‐Dimensional Molecular Metals

et al. 2017

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk 1 DOI: 10.1002/((please add manuscript number)) Article type: Communication Low-Cost and Sustainable Organic Thermoelectrics Based on LowDimensional Molecular MetalsBy Florian Huewe*, Alexander Steeger*, Kalina Kostova, Laurence Burroughs, Irene Bauer, Peter Strohriegl, Vladimir Dimitrov, Simon Woodward and Jens Pflaum* F. Huewe [ †] , A. Steeger [ †] The dimensionless figure of merit measures a material's thermoelectric performancewhere electrical conductivity (resistivity ), Seebeck coefficient/thermopower , and thermal conductivity provide the power factor = 2 . Materials with high electrical conductivity and thermopower but low thermal conductivity are desirable to maximize and hence, the thermoelectric conversion efficiency. Approximately, is inversely proportional to which in turn is related to the electronic thermal conductivity el = via the Wiedemann-Franz (WF) law.Advances in have been achieved by tuning the doping of semiconductors to maximize the [6] together with reducing the phononic contribution to thermal conduction by means of nanostructured superlattice architectures [7,8] . To overcome the inherent limitations of ordinary materials, a dimensionality reduction of the electronic system has been proposed [9] . This can lead to a violation of the WF law [10,11] and to phonon drag contributions to the thermopower [12] . Complex crystal structures, e.g. Zintl compounds [13] and skutterudites [14] , have been evaluated as good thermoelectric 3 candidates due to reduced lattice thermal conductivity and electronic band structure tunability. These optimization strategies, together with the ability for low-cost production and low-temperature processibility, have recently raised interest in organic polymers [15] , such as PEDOT:Tos, reaching = 0.25 at room temperature (RT) [4] and thus advancing the value of = 1.2 obtained for Bi2Te3 (the best RT thermoelectric material to date [7] ). Herein, quasi-1D organic conductors based on small molecules constitute a new, sustainable approach towards organic thermoelectrics that provide many of the desired electrical and thermal properties described above. Additionally, they are lightweight and thermodynamically stable allowing for portable device manufacturing and long-term usage. In comparison to organic polymers the availability of electrically high-performing p-and ntype organic conductors facilitates the construction of all-organic thermoelectric devices.As a starting point we chose two of the best p-and n-type conducting radical ion salts, TTT2I3 (TTT = Tetrathiotetracene) and (DMe-DCNQI)2Cu (DMe-DCNQI = Dimethyl-Dicyanoquinonediimine).They form macroscopic needle-like sin...

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Low‐Cost and Sustainable Organic Thermoelectrics Based on Low‐Dimensional Molecular Metals

et al. 2017

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“…Thermoelectric power generators offer several distinct advantages over other power generation technologies (Riffat & Ma, 2003;Yadav et al, 2008): they are simple, compact and safe devices; they are environmentally friendly; they have very small size and virtually weightless; they are capable of operating at elevated temperatures; they are extremely reliable (typically exceed 100,000 hours of steady-state operation) and silent in operation since they have no mechanical moving parts and require considerably less maintenance; they are flexible power sources; they are suited for small-scale and remote applications typical of rural power supply, where there is limited or no electricity; and they are not position-dependent. The major drawback of the thermoelectric power generator is its relatively low conversion efficiency (typically ~5% (Rowe & Min, 1998)). This has been a major cause in restricting their use in electrical power generation to specialized fields with extensive applications where reliability is a major consideration and cost is not.…”

Section: Thermoelectric Power Generation As An Alternative Clean Enermentioning

confidence: 99%

“…This has been a major cause in restricting their use in electrical power generation to specialized fields with extensive applications where reliability is a major consideration and cost is not. Applications over the past decade included industrial instruments, military, medical and aerospace (Riffat & Ma, 2003;Rowe & Min, 1998), and applications for portable or remote power generation (Stevens, 2001). However, in recent years, an increasing concern of environmental issues of GHG emissions, in particular global warming has resulted in extensive research into nonconventional technologies of generating electrical power and thermoelectric power generation has emerged as a promising alternative green energy technology.…”

Section: Thermoelectric Power Generation As An Alternative Clean Enermentioning

confidence: 99%

Power Generation Using Nonconventional Renewable Geothermal & Alternative Clean Energy Technologies

Ismail¹

2011

Planet Earth 2011 - Global Warming Challenges and Opportunities for Policy and Practice

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“…[1][2][3] Currently, the renewable energy sources (solar, wind, and geothermal) account for a small fraction of the electricity consumed, which has not affected the relatively high costs of energy utilization. Therefore, it is significant to find costeffective technologies for generating electricity from waste heat.…”

Section: Introductionmentioning

confidence: 99%

Impact Factors Analysis of the Hot Side Temperature of Thermoelectric Module

Zhang

Tan

Yang

2017

Journal of Elec Materi

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The thermoelectric generator (TEG) plays a crucial role in converting the waste energy of exhaust into electricity, which ensures energy saving and increased fuel utilization efficiency. In the urban driving cycle, frequent vehicle operation, like deceleration or acceleration, results in continuous variation of the exhaust temperature. In order to make the operating performance stable, and to weaken the adverse effects of the frequent variation of the exhaust temperature on the lifetime and work efficiency of the electronic components of TEG systems, the output voltage of the thermoelectric (TE) module should stay more stable. This article provides an improved method for the temperature stability of the TE material hot side based on sandwiching material. From the view of the TEG system's average output power and the hot side temperature stability of the TE material, the analyzing factors, including the fluctuation frequency of the exhaust temperature and the physical properties and thickness of the sandwiching material are evaluated, respectively, in the sine and new European driving cycle (NEDC) fluctuation condition of the exhaust temperature. The results show few effects of sandwiching material thickness with excellent thermal conductivity on the average output power. During the 150-170 s of the NEDC test condition, the minimum hot side temperatures with a BeO ceramic thickness of 2 mm and 6 mm are, respectively, 537.19 K and 685.70 K, which shows the obvious effect on the hot side temperature stability of the BeO ceramic thickness in the process of acceleration and deceleration of vehicle driving.

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Evaluation of thermoelectric modules for power generation

Cited by 404 publications

References 2 publications

Low‐Cost and Sustainable Organic Thermoelectrics Based on Low‐Dimensional Molecular Metals

Low‐Cost and Sustainable Organic Thermoelectrics Based on Low‐Dimensional Molecular Metals

Power Generation Using Nonconventional Renewable Geothermal & Alternative Clean Energy Technologies

Impact Factors Analysis of the Hot Side Temperature of Thermoelectric Module

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