Analysis of thermoelectric generator incorporating n-magnesium silicide and p-tetrahedrite materials

Brito, F. P.; Vieira, Rui Castro; Martins, Jorge; Gonçalves, L. M.; Gonçalves, A.P.; Coelho, Rodrigo; Lopes, Elsa B.; Symeou, Elli; Kyratsi, Theodora

doi:10.1016/j.enconman.2021.114003

Cited by 17 publications

(18 citation statements)

References 44 publications

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“…The p-tetrahedrites and n-silicides have nominal compositions of Cu 11 MnSb 4 S 13 and Mg 2 Si 0.57 Sn 0.4 Bi 0.03 , respectively. Although the power factor is different between the two members (Figure 1a), zT is the same (Figure 1b) due to the much lower tetrahedrite thermal conductivity [23]. The difference in power factor (originated from electrical conductivity) hints that the optimal p-and n-type section areas will tend to be different.…”

Section: Conceptmentioning

confidence: 95%

“…Firstly, the TE materials used in large-scale IWHR need to be much cheaper than the currently ones (e.g., Bismuth Telluride) [4,24]. The authors have previously studied and established competitive conventional TE elements made of the materials developed in the project THERMOSS (p-tetrahedrite, n-magnesium silicide), which are proposed to be used in the new TEGs [23]. They display prices of around 5 USD/kg, while Bismuth Telluride is at least 20 times more expensive, besides containing rare and toxic materials (e.g., tellurium) [4].…”

Section: Conceptmentioning

confidence: 99%

“…It is incorporated into the model as a generic electrical resistor connected in series to the pair via one of the boundaries identified as "terminal" and it is also connected to the ground (reference zero voltage), as seen in Figure 6. Similarly to what was published by the authors for the case of the conventional geometry modules [23], matched load conditions were imposed. These conditions correspond to the condition under which the generated power is maximized.…”

Section: Electrical Boundary Conditionsmentioning

confidence: 99%

“…The main novelty of the present work seems to be the large element geometry configuration, which has rarely been assessed, but which enables a series of strategies that are useful for large-scale, affordable TEG systems, described in continuation. Moreover, the materials used, developed recently by the authors [23], are novel materials displaying low cost and attractive performance for their cost. The multiphysics analysis is also carefully performed.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of a Silicide-Tetrahedrite Thermoelectric Generator Concept Suitable for Large-Scale Industrial Waste Heat Recovery

et al. 2021

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Industrial Waste Heat Recovery (IWHR) is one of the areas with strong potential for energy efficiency and emissions reductions in industry. Thermoelectric (TE) generators (TEGs) are among the few technologies that are intrinsically modular and can convert heat directly into electricity without moving parts, so they are nearly maintenance-free and can work unattended for long periods of time. However, most existing TEGs are only suitable for small-scale niche applications because they typically display a cost per unit power and a conversion efficiency that is not competitive with competing technologies, and they also tend to rely on rare and/or toxic materials. Moreover, their geometric configuration, manufacturing methods and heat exchangers are often not suitable for large-scale applications. The present analysis aims to tackle several of these challenges. A module incorporating constructive solutions suitable for upscaling, namely, using larger than usual TE elements (up to 24 mm in diameter) made from affordable p-tetrahedrite and n-magnesium silicide materials, was assessed with a multiphysics tool for conditions typical of IWHR. Geometric configurations optimized for efficiency, power per pair and power density, as well as an efficiency/power balanced solution, were extracted from these simulations. A balanced solution provided 0.62 kWe/m2 with a 3.9% efficiency. Good prospects for large-scale IWHR with TEGs are anticipated if these figures could be replicated in a real-world application and implemented with constructive solutions suitable for large-scale systems.

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Section: Conceptmentioning

confidence: 95%

Section: Conceptmentioning

confidence: 99%

Section: Electrical Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of a Silicide-Tetrahedrite Thermoelectric Generator Concept Suitable for Large-Scale Industrial Waste Heat Recovery

et al. 2021

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“…The boosting efficiency of the designed circuit was 50%. In addition, the multilevel DC-DC conversion affects the efficiency, where Li M. et al [175] held a case study on multilevel DC-DC conversion based on TEGs, then compared the suggested design with a conventional mono stage system. The conversion efficiency of the proposed was improved by up to 400%.…”

Section: Proposed Solution To Some Of the Challengesmentioning

confidence: 99%

Thermoelectric Power Generators: State-of-the-Art, Heat Recovery Method, and Challenges

et al. 2021

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Electricity plays a significant role in daily life and is the main component of countless applications. Thus, ongoing research is necessary to improve the existing approaches, or find new approaches, to enhancing power generation. The thermoelectric generator (TEG) is among the notable and widespread technologies used to produce electricity, and converts waste energy into electrical energy using the Seebeck effect. Due to the Seebeck effect, temperature change can be turned into electrical energy; hence, a TEG can be applied whenever there is a temperature difference. The present paper presents the theoretical background of the TEG, in addition to a comprehensive review of the TEG and its implementation in various fields. This paper also sheds light on the new technologies of the TEG and their related challenges. Notably, it was found that the TEG is efficient in hybrid heat recovery systems, such as the phase change material (PCM), heat pipe (HP), and proton exchange membrane (PEM), and the efficiency of the TEG has increased due to a set of improvements in the TEG’s materials. Moreover, results show that the TEG technology has been frequently applied in recent years, and all of the investigated papers agree that the TEG is a promising technology in power generation and heat recovery systems.

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Fully Self-Powered Electrospray System via Triboelectric High Voltage Generator and Its Use to Control Wettability of Various Surfaces

Lee

Cho

Jang

et al. 2022

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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Analysis of thermoelectric generator incorporating n-magnesium silicide and p-tetrahedrite materials

Cited by 17 publications

References 44 publications

Analysis and Design of a Silicide-Tetrahedrite Thermoelectric Generator Concept Suitable for Large-Scale Industrial Waste Heat Recovery

Analysis and Design of a Silicide-Tetrahedrite Thermoelectric Generator Concept Suitable for Large-Scale Industrial Waste Heat Recovery

Thermoelectric Power Generators: State-of-the-Art, Heat Recovery Method, and Challenges

Fully Self-Powered Electrospray System via Triboelectric High Voltage Generator and Its Use to Control Wettability of Various Surfaces

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