Analytical and Experimental Study of Thermoelectric Generator (TEG) System for Automotive Exhaust Waste Heat Recovery

Albatati, Faisal; Attar, Alaa

doi:10.3390/en14010204

Cited by 24 publications

(18 citation statements)

References 18 publications

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“…This improves fuel efficiency by around 10%. For instance, a TEG system integrated into a semi-truck automotive system may produce a power of 1.25 kW, representing 20% of the engine's power need [77].…”

Section: Teg In Applications and Classificationsmentioning

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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Section: Teg In Applications and Classificationsmentioning

confidence: 99%

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

et al. 2021

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“…According to [33], the electric current density can be computed as (4), where → E = −∇φ is the electric field intensity vector, and ρ is the electrical resistivity. In addition, the electric scalar potential φ is defined by (5).…”

Section: Governing Equationsmentioning

confidence: 99%

“…The voltage distribution throughout a control volume of a TEG device considering the electric current density vector ∇• → J = 0 for a steady-state condition, can be derived using Equation (5) resulting in (9), [34].…”

Section: Governing Equationsmentioning

confidence: 99%

“…A single thermoelectric generator (TEG) is a device composed of semiconductor materials (N and P-type) connected electrically in series and thermally in parallel (More than two modules can be electrically connected either in series or parallel) that produces electric power from a temperature difference (Seebeck effect), or cooling from an electric potential source (Peltier effect) [1]. These devices are used in a wide range of applications i.e., bio-integrated wearable devices [2], pipe heat energy waste [3], automobile exhaust heat [4,5], heat exchangers [6], combustion engines [7,8], photovoltaic systems [9][10][11], and space exploration [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Thermoelectric Generators under Mismatching Conditions

2021

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Due to the wide usability of thermoelectric generators (TEG) in the industry and research fields, it is plausible that mismatching conditions are present on the thermal surfaces of a TEG device, which induces negative-performance effects due to uneven surface temperature distributions. For this reason, the objective of this study is to characterize numerically the open-circuit electric output voltage of a TEG device when a mismatching condition is applied to both the cold and hot sides of the selected N and P-type semiconductor material Bi0.4Sb1.6Te3. A validated numerical simulation paired with a parametric study is conducted using the Thermal-Electric module of ANSYS 2020 R1, for which different thermal boundary and mismatching conditions are applied while considering the temperature-dependent thermoelectrical properties of the N and P-type material. The results show an inverse relationship between the open-circuit voltage and the mismatching temperature difference. When a mismatching condition is applied on the hot side of the TEG device, the temperature-dependent electrical resistance has lower values, deriving in higher voltage results (linear tendency) compared to a mismatching condition applied to the cold side (non-linear tendency).

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“…These two-wheel vehicles daily dissipate the exhaust heat, which accounts for around 40% of the energy produced by the combustion process inside the internal combustion engine (Yang and Stabler, 2009). With that enormous energy source, the applications of energy recovery technologies such as thermoelectric generator (TEG) (Albatati and Attar, 2021;Luo et al, 2020;Kunt, 2018) and Rankine cycle (Colonna et al, 2015;Uusitalo et al, 2014;Sprouse and Depcik, 2013) are feasible to enhance energy extraction efficiency and reduce environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Study on the effects of guide fins structures on the flow and thermal uniformity of the motorcycle exhaust thermoelectric generator

Hong

Nghiem

Nguyen

et al. 2022

MMMS

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PurposeThe purpose of this paper is to investigate the effect of different guide fins structures (i.e. single-layer and double-layer guide fins) on the exhaust flow and thermal uniformity of the motorcycle exhaust thermoelectric generator.Design/methodology/approachOne single-layer guide fins structure and three double-layer guide fins structures are numerically investigated in terms of exhaust flow uniformity with different exhaust properties. Then, the double-layer guide fins structure achieving the highest flow uniformity is fabricated and experimentally investigated on a motorcycle at different engine speeds together with the single-layer guide fins structure to evaluate the thermal uniformity.FindingsThe double-layer guide fins structure obtains a better flow uniformity and thermal uniformity compared to the single-layer structure. Among surveyed structures, the double-layer structure with three closed V-shape guide fins achieves the highest flow uniformity. This structure also improves the thermal uniformity from 3.0 to 90.1% in comparison with the single-layer structure in experiments.Originality/valueIn this paper, the double-layer guide fins structures are derived from the improvement of the single-layer guide fins structure. The fluid flow uniformity index is applied as a measure for assessing the exhaust flow uniformity. The enhancement of thermal uniformity of the double-layer guide fins structure is expected to increase the longevity and performance of the motorcycle exhaust thermoelectric generator.

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Analytical and Experimental Study of Thermoelectric Generator (TEG) System for Automotive Exhaust Waste Heat Recovery

Cited by 24 publications

References 18 publications

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

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

Evaluation of Thermoelectric Generators under Mismatching Conditions

Study on the effects of guide fins structures on the flow and thermal uniformity of the motorcycle exhaust thermoelectric generator

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