Performance evaluation of Ge/SiGe-based thermoelectric generator

Big-Alabo, Ameze

doi:10.1016/j.physe.2018.12.024

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…For example, the power generation of the TEG should be boosted by exploring advanced materials with a higher figure of merit (ZT), which is an important index for evaluating material performance. Currently, the commercial thermoelectric materials applied in TEGs are mainly BiTe [2,3], PbTe [4], SiGe [5], and CoSb3 [6], but the ZT values of these materials are between 1 and 1.6. With the development of modern synthesis and characterization techniques, Potirniche et al [7] have studied the behaviors of the TEG system with nanostructured materials by developing a finite element model.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Plate-Type Thermoelectric Generator for Fluid Waste Heat Recovery Using Thermal Resistance and Numerical Models

Jia,

Wang,

Chen

2024

WEVJ

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In current research, there are excessive assumptions and simplifications in the mathematical models developed for thermoelectric generators. In this study, a comprehensive mathematical model was developed based on a plate-type thermoelectric generator divided into multiple thermoelectric units. The model takes into account temperature-dependent thermoelectric material parameters and fluid flow. The model was validated, and a maximum error of 6.4% was determined. Moreover, the model was compared and analyzed with a numerical model, with a maximum discrepancy of 7.2%. The model revealed the factors and their degree of influence on the performance of the thermoelectric generator unit. In addition, differences in temperature distribution, output power, and conversion efficiency between multiple thermoelectric units were clearly studied. This study can guide modeling and some optimization measures to improve the overall performance of thermoelectric generators.

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Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Plate-Type Thermoelectric Generator for Fluid Waste Heat Recovery Using Thermal Resistance and Numerical Models

Jia,

Wang,

Chen

2024

WEVJ

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“…They also analyzed the exergoeconomic performance of this generator. Big-Alabo [18] experimentally evaluated the performance of a TEG using the Ge/SiGe structure. Bittner et al [19] used materials of high performance to characterize the TEGs.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Modeling of Thermoelectric Modules Based on Skutterudites Family

Sifi¹,

Ghellai²,

Menni³

et al. 2020

IJES

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Thermoelectric modules are energy conversion devices which can either convert heat to electricity or operate in reverse as a heat pump. The physics of thermoelectricity can be modeled at several levels: quantum mechanical, statistical mechanical and at a macroscopic level using the transport equations directly. Among the new materials for the ambient temperature, one finds without being exhaustive the families of materials named 'Skutterudites', 'Clathrates' or 'LAST'. According to composition, skutterudites can be of type 'p' or type 'n' but it is these which present the highest merit factors. Thus, ZT = 1.7 at T = 850 K was obtained in the Ba0,08La0,05Yb0,04Co4Sb12 structure case of the n type, while ZT = 1,16 at T 800 K in the Ba0,15Yb0,2In0,2Co4Sb12 structure case of the p type. The target of this analysis is to examine the characteristics of a new Ba0,08La0,05Yb0,04Co4Sb12 thermoelectric material, by MATLAB simulation.

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“…The OV for the thermoelectric generator was 121.7 mV at Δ T of 140 K and the output power was 1.47 μW at Δ T of 140 K. The voltage factor for the thermoelectric generator was 1.35 μV/mm 2 K and the power factor was 0.16 pW/mm 2 K 2 . Big-Alabo [11] produced a thermoelectric generator using low pressure chemical vapor deposition and a micro-fabrication process [12]. Ge and SiGe were the thermoelectric materials.…”

Section: Introductionmentioning

confidence: 99%

“…The FTG kept its performance after 10,000 stretching cycles at a 30% strain. These thermoelectric generators [13,14,15,16,17] are flexible and have more applications than non-flexible thermoelectric generators [9,10,11]. This study uses a low cost electroplating process that allows easy fabrication to manufacture a flexible thermoelectric generator on an epoxy substrate.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Flexible Thermoelectric Generators Using Micromachining and Electroplating Techniques

et al. 2019

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This study involves the fabrication and measurement of a flexible thermoelectric generator (FTG) using micromachining and electroplating processes. The area of the FTG is 46 × 17 mm2, and it is composed of 39 thermocouples in series. The thermoelectric materials that are used for the FTG are copper and nickel. The fabrication process involves patterning a silver seed layer on the polymethyl methacrylate (PMMA) substrate using a computer numerical control (CNC) micro-milling machine. Thermoelectric materials, copper and nickel, are deposited on the PMMA substrate using an electroplating process. An epoxy polymer is then coated onto the PMMA substrate. Acetone solution is then used to etch the PMMA substrate and to transfer the thermocouples to the flexible epoxy film. The FTG generates an output voltage (OV) as the thermocouples have a temperature difference (ΔT) between the cold and hot parts. The experiments show that the OV of the FTG is 4.2 mV at ΔT of 5.3 K and the output power is 429 nW at ΔT of 5.3 K. The FTG has a voltage factor of 1 μV/mm2K and a power factor of 19.5 pW/mm2K2. The FTG reaches a curvature of 20 m−1.

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Performance evaluation of Ge/SiGe-based thermoelectric generator

Cited by 10 publications

References 6 publications

Theoretical Analysis of Plate-Type Thermoelectric Generator for Fluid Waste Heat Recovery Using Thermal Resistance and Numerical Models

Theoretical Analysis of Plate-Type Thermoelectric Generator for Fluid Waste Heat Recovery Using Thermal Resistance and Numerical Models

Analysis and Modeling of Thermoelectric Modules Based on Skutterudites Family

Fabrication and Characterization of Flexible Thermoelectric Generators Using Micromachining and Electroplating Techniques

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