Realising the potential of thermoelectric technology: a Roadmap

Freer, Robert; Powell, Anthony V.

doi:10.1039/c9tc05710b

Cited by 214 publications

(223 citation statements)

References 67 publications

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“…For computational calculation, the governing equations were discretized using Equations (24)- (26), and the results are given by Equations (27)- (30), which correspond to Equations (20)- (23). For the stable analysis condition, the time interval (∆t) must be higher than the minimum time step in Equation 31.…”

Section: Discretization Using the Finite Difference Methodsmentioning

confidence: 99%

“…Among the many applications of TEMs, the thermoelectric radiant panel (TERP) has much interest owing to its good constructability, compact size, and potential as a parallel cooling and heating device under stable thermal loads [21]. It has a limitation by the low performance value, which is evaluated as the figure of merit of thermoelectric materials (ZT) [22,23], however the recent advances in thermoelectric material make it possible to improve the ZT value [24][25][26][27]. Additionally, TERP does not require an additional heat exchanger for cooling or heating the liquid or air and it can be directly attached on the radiant cooling/heating surface.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Study on the Performance of Thermoelectric Radiant Panel for Space Heating

Lim

Jeong

2020

Materials

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The purpose of this study is to investigate the suitable operation and performance of a thermoelectric radiant panel (TERP) in the heating operation. First, the hypothesis was suggested that the heating operation of TERP can operate without a heat source at the cold side according to theoretical considerations. To prove this hypothesis, the thermal behavior of the TERP was investigated during the heating operation using a numerical simulation based on the finite difference method. The results indicated that it is possible to heat the radiant panel using a thermoelectric module without fan operation via the Joule effect. A mockup model of the TERP was constructed, and the numerical model and hypothesis were validated in experiment 1. Moreover, experiment 2 was performed to evaluate the necessity of fan operation in the heating operation of TERP regarding energy consumption. The results revealed that the TERP without fan operation showed the higher coefficient of performance (COP) in the heating season. After determining the suitable heating operation of the TERP, prediction models for the heating capacity and power consumption of the TERP were developed using the response surface methodology. Both models exhibited good R2 values of >0.94 and were validated within 10% error bounds in experimental cases. These prediction models are expected to be utilized in whole-building simulation programs for estimating the energy consumption of TERPs in the heating mode.

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Section: Discretization Using the Finite Difference Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on the Performance of Thermoelectric Radiant Panel for Space Heating

Lim

Jeong

2020

Materials

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“…Thermoelectric generators (TEGs) are solid state devices that convert a heat ux directly into electrical power [1]. The performance of TEGs are controlled by two main factors: functionality and e ciency of the semiconducting materials (thermoelements) from which the generator is composed.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Study of La2Ti2-xNbxO7 (0 ≤ x ≤ 0.25) Ceramics

Iyasara

Idu

2020

Preprint

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La2Ti2 − xNbxO7 (x = 0.00, 0.05, 0.10, 0.15, 0.20, 0.25) powders were synthesised via solid state reaction method, followed by sintering at 1673 K in a reducing atmosphere of 5% H2/N2 gas. The crystal structure, microstructure and thermoelectric (TE) properties of the pure and Nb-doped La2Ti2O7 ceramics were investigated. All compositions were single phase with porous microstructures consistent with their low experimental densities. Thermoelectric results of Nb-doped compositions showed improved properties in comparison to pure La2Ti2O7, suggesting that cation doping has the potential to improve the thermoelectric properties. Generally, the TE results obtained are not suitable for thermoelectric applications. However, the high Seebeck coefficient ( \ge 190 µV/K) and glass-like thermal conductivity ( \le 2.26 \text{W}/\text{m}.\text{K}) values achieved have opened a new window for exploring the thermoelectric potentials of La2Ti2O7 and other related oxides.

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“…These materials are environment friendly and mostly used for the development of sustainable energy materials. It has been reported that the narrow band material like PbTe has shown superior thermoelectric (TE) properties and is currently used in different applications [ 2 , 3 ]. These materials have prospective uses in thermal power generation and thermal sensing equipments.…”

Section: Introductionmentioning

confidence: 99%

“…These materials have prospective uses in thermal power generation and thermal sensing equipments. Diverse theoretical calculations and experimental data point to the upgrading in TE properties, which can be achieved by reducing the dimensionality of TE materials to a certain lowest amount level [ 2 , 4 , 5 , 6 , 7 , 8 ]. The dimensionless parameter figure of merit, which determines the efficiency TE material is ZT = (S 2 σT)/K, where S is Seebeck coefficient, σ is electrical conductivity, T is working temperature in Kelvin, and K is thermal conductivity of TE material [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

A Facile Chemical Synthesis of PbTe Nanostructures at Room Temperature

Gite

Palve

Gaikwad³

et al. 2020

Nanomaterials

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Thermoelectric (TE) materials are possible solutions of the current problems in the energy sector to overcome environmental pollution, increasing energy demand and the decline of natural resources. Thermoelectric materials are a promising alternative for the conversion of waste heat to electricity. Nanocrystalline PbTe powder was synthesized by a simple chemical method at room temperature and systematically investigated at various durations as samples A1–A5. Fourier Transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), microstructural analysis by scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) confirmed the composition of the samples. TE parameters as thermo-emf of samples A1–A5 and electrical conductivity were measured. The cyclic voltammetry gives a band gap of 0.25 eV, which is in agreement with the optical band gap of the material. The A4 sample has an average crystal size of 36 nm with preferred orientation in (200) verifying the cubic morphology. The obtained TE parameters are beneficial for the non-uniform TE materials which might be due to strong current boundary scattering and extremely low thermal conductivity of the samples.

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Realising the potential of thermoelectric technology: a Roadmap

Abstract: Thermoelectric generators have the potential to convert heat to electrical power in a range of industrial sectors.

Cited by 214 publications

References 67 publications

Numerical and Experimental Study on the Performance of Thermoelectric Radiant Panel for Space Heating

Numerical and Experimental Study on the Performance of Thermoelectric Radiant Panel for Space Heating

Thermoelectric Study of La2Ti2-xNbxO7 (0 ≤ x ≤ 0.25) Ceramics

A Facile Chemical Synthesis of PbTe Nanostructures at Room Temperature

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