Thermodynamics analysis of thermoelectric materials: Influence of cracking on efficiency of thermoelectric conversion

Zhang, Aibing; Wang, Baolin; Ji, Wang; Du, Jianke; Xie, Chao; Yu, Jingui

doi:10.1016/j.applthermaleng.2017.08.154

Cited by 43 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, they also discussed the effect of thermoelectric performance and crack location on thermoelectric conversion efficiency. Moreover, Zhang et al [13] investigated the problem of finite-size thermoelectric materials with an elliptical crack. They mainly explored the effect of crack size, crack location, and crack thermal conductivity on thermoelectric conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of the ratio of the radius of the hole and crack length on the multi‐field behaviors of thermoelectric materials under oblique loads

Jiang

Zhou

2022

Z Angew Math Mech

View full text Add to dashboard Cite

This paper establishes a defect model of thermoelectric materials that the oblique multi-field loads are applied along an arbitrary direction with the crack initiated from a circular hole, and gives both analytical solutions and finite element method (FEM) simulation. On the one hand, in virtue of the conformal mapping function and the Cauchy integral formula, the analytical solutions of electric current density, energy flux, and stress are obtained. Furthermore, the thermoelectric field intensity factors (TEIFs) and the stress intensity factors are also attained. Most notably, we apply the extreme value theorem of multivariate function to explore the effect of the ratio of the radius of the hole, R, and crack length, L, on the fields' intensity factors of thermoelectric materials under oblique multifield loads. Importantly, the maximum value of the mode-II stress intensity factor (SIF) is obtained when 𝑅∕𝐿 = √ 3∕8. On the other hand, the finite element simulation is used to explore the fracture behaviors of thermoelectric materials. The analytical solutions and the finite element simulation results are consistent. The effects of the oblique multi-field loads on the thermoelectric field and the stress field at the crack tip are detailed. The concentration phenomenon of the thermoelectric field and the stress field at the crack tip are influenced by the radius of the circular hole, the crack length, and the directions of the loads.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Moreover, Zhang et al. [13] investigated the problem of finite‐size thermoelectric materials with an elliptical crack. They mainly explored the effect of crack size, crack location, and crack thermal conductivity on thermoelectric conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

The effect of the ratio of the radius of the hole and crack length on the multi‐field behaviors of thermoelectric materials under oblique loads

Jiang

Zhou

2022

Z Angew Math Mech

View full text Add to dashboard Cite

show abstract

“…A thermoelectric generator (TEG) based on the Seebeck effect can convert temperature difference energy into electrical energy. The TEG has no moving parts and does not require chemical reactions [10], [11]. Absence of noise, a simple structure, long service life, safety, and reliability are some of the advantages of TEG.…”

Section: Introductionmentioning

confidence: 99%

A New Seafloor Hydrothermal Power Generation Device Based on Waterproof Thermoelectric Modules

Xie

Yang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

Submarine hydrothermal fluids contain substantial energy, and temperature differences with the surrounding cold seawater can provide energy for seabed observations and submarine operations. This study proposes a novel hydrothermal power generation device comprising a thermoelectric converter and an energy management system. Herein, a waterproof module with high-temperature and high-pressure resistance was designed. Heating and pressurization tests were performed to verify the structure's feasibility. The overall structure of the system based on the module was then designed, and laboratory performance tests were conducted. A computational fluid dynamics simulation was used to further analyze the heat transfer model. The simulation results are consistent with experimental data, validating the simulation model's accuracy. The new device reduces its own weight and solves low heat transfer efficiency problems. This study increases the temperature difference between the two ends of the thermoelectric generator in the thermoelectric converter by 76.2%.INDEX TERMS CFD simulation, energy conversion, heat transfer model, hydrothermal fluid, submarine energy.

show abstract

“…[32,33]. A theoretical model to analyze the energy conversion efficiency of a cracked thermoelectric material with finite height and width based on the nonlinearly coupled transport equations of electricity and heat was developed by Zhang et al [34] The three-dimensional ellipsoidal in-clusion problem in thermoelectric materials and the effective material properties of the matrix-inclusion system were studied by Wang et al [35] From Refs. [30,[32][33][34][35], it is also found that the effective figure of merit can exceed that of each constituent.…”

Section: Introductionmentioning

confidence: 99%

“…A theoretical model to analyze the energy conversion efficiency of a cracked thermoelectric material with finite height and width based on the nonlinearly coupled transport equations of electricity and heat was developed by Zhang et al [34] The three-dimensional ellipsoidal in-clusion problem in thermoelectric materials and the effective material properties of the matrix-inclusion system were studied by Wang et al [35] From Refs. [30,[32][33][34][35], it is also found that the effective figure of merit can exceed that of each constituent. A continuum linear theory for thermoelectric materials was developed by Liu under the conditions of small variations of temperature, electric potential, and their gradients, and this linear theory is further used to predict effective properties of thermoelectric composites.…”

Section: Introductionmentioning

confidence: 99%

Influence of spherical inclusions on effective thermoelectric properties of thermoelectric composite materials

Yan

Zhang

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

A homogenization theory is developed to predict the influence of spherical inclusions on the effective thermoelectric properties of thermoelectric composite materials based on the general principles of thermodynamics and Mori–Tanaka method. The closed-form solutions of effective Seebeck coefficient, electric conductivity, heat conductivity, and figure of merit for such thermoelectric materials are obtained by solving the nonlinear coupled transport equations of electricity and heat. It is found that the effective figure of merit of thermoelectric material containing spherical inclusions can be higher than that of each constituent in the absence of size effect and interface effect. Some interesting examples of actual thermoelectric composites with spherical inclusions, such as insulated cavities, inclusions subjected to conductive electric and heat exchange and thermoelectric inclusions, are considered, and the numerical results lead to the conclusion that considerable enhancement of the effective figure of merit is achievable by introducing inclusions. In this paper, we provide a theoretical foundation for analytically and computationally treating the thermoelectric composites with more complicated inclusion structures, and thus pointing out a new route to their design and optimization.

show abstract

Thermodynamics analysis of thermoelectric materials: Influence of cracking on efficiency of thermoelectric conversion

Cited by 43 publications

References 39 publications

The effect of the ratio of the radius of the hole and crack length on the multi‐field behaviors of thermoelectric materials under oblique loads

The effect of the ratio of the radius of the hole and crack length on the multi‐field behaviors of thermoelectric materials under oblique loads

A New Seafloor Hydrothermal Power Generation Device Based on Waterproof Thermoelectric Modules

Influence of spherical inclusions on effective thermoelectric properties of thermoelectric composite materials

Contact Info

Product

Resources

About