Thermal management of thermoelectric generators for waste energy recovery

Fernández-Yáñez, Pablo; Romero, Vicente; Armas, Octavio; Cerretti, Giacomo

doi:10.1016/j.applthermaleng.2021.117291

Cited by 96 publications

(26 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermoelectric materials are the heart of thermoelectric generators, solid-state-direct heat to electricity devices that function through the Seebeck effect . The Seebeck effect takes place when a temperature gradient causes diffusion of charge carriers from hot to cold thereby generating current.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb_13–xCa_xBaMgSb₁₁ (x = 1–6)

et al. 2021

Self Cite

View full text Add to dashboard Cite

The band structure of Yb14MgSb11 is tuned by substituting the more earth-abundant cations, Ca and Ba, on the four crystallographically distinct Yb sites (Yb13–x Ca x BaMgSb11 (x = 1, 2, 3, 4, 5, 6)). Single crystals of composition Yb9.7(2)Ca3.85(5)Ba0.29(4)Mg1.13(3)Sb11.0(1) were grown from Sn flux revealing the cation site preferences. Magnetic measurements on this crystal show paramagnetic behavior consistent with the presence of ∼0.85 Yb3+. High-purity samples (>98%) with compositions close to nominal of Yb13–x Ca x BaMgSb11 (x = 1–6) were prepared by ball milling and spark plasma sintering. The carrier concentration can be rationalized with the presence of Yb3+ for all samples and decreases as a function of x in a systematic fashion at room temperature and increases above ∼600 K for x = 3–6. The temperature dependence of the carrier concentration can be understood considering the electronic structure with a light and heavy band valence band contributing to the properties and suggests the involvement of a localized flat band or impurity state that is active with increasing amounts of Ca. The effect of temperature leads to sustained high Seebeck coefficients with low electrical resistivity arising from the transitioning of the light to heavy band with localization of carriers in the flat band or impurity state for Ca-rich compositions. Speed of sound measurements show that the lattice stiffens with increasing x. Despite the stiffening lattice, the thermal conductivity decreases until x = 3, 4 at which point it increases slightly. The x = 4 sample reaches a peak figure of merit (zT) of 1.32 at 1273 K while being 16% lighter by the molar mass compared to Yb14MnSb11 thereby providing a more power dense material.

show abstract

Section: Introductionmentioning

confidence: 99%

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb_13–xCa_xBaMgSb₁₁ (x = 1–6)

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the first case, the TEG is generally coupled to the exhaust gas system once the primary waste energy flows from this vehicle device. Gasoline vehicles present a better power output than diesel vehicles, and * corresponding author:rfrancop@unal.edu.co this energy could be used to power the car's electrical devices and improve engine performance [6]. In the second application, photovoltaic cells, only the photons with energies close to the cell band gap contribute to an effective electric conversion, and the energy of the photons greater than the cell band gap is dissipated as heat.…”

Section: Introductionmentioning

confidence: 99%

“…A hybrid solution involves attaching a TEG to the back of the cell to convert the wasted heat into electric power. Some experimental results show that the electric efficiency of the PV-TE system should be enhanced at around 8% when compared with the PV solar system alone [6].…”

Section: Introductionmentioning

confidence: 99%

Universality and the thermoelectric transport properties of a double quantum dot system: Seeking for conditions that improve the thermoelectric efficiency

Cortes-Santamaria¹,

Landazabal-Rodríguez²,

Silva-Valencia³

et al. 2023

Preprint

View full text Add to dashboard Cite

Employing universal relations for the Onsager coefficients in the linear regime at the symmetric point of the single impurity Anderson model, we calculate the conditions under which the quantum scattering phase shift should satisfy to produce the asymptotic Carnot's limit for the thermoelectric efficiency. We show that a single quantum dot connected by metallic leads at the Kondo regime cannot achieve the conditions that cause the best thermoelectric efficiency. We study a system of serial double quantum dots without inter-dot correlations. We show that maintaining one dot in the electron-hole symmetric point makes it possible to obtain conditions for the quantum phase shift linked to charge fluctuations in the other quantum dot that satisfy the conditions associated with enhancing the thermoelectric efficiency.We also discuss the presence of bound states in the continuum (BICs) and quasi-BICs associated with the quantum scattering interference process that improves thermoelectric efficiency. We identify two types of quasi-BICs that occur at low and high temperatures: The first is associated with single Fano resonances, and the last is with several Fano processes. We also discussed possible temperature values and conditions that could be linked with the experimental realization of our results.

show abstract

“…Based on this, many scholars currently use semiconductor thermoelectric generation (Ge et al, 2021) technology to convert this waste heat into electricity. Thermoelectric generator (TEG) (Fernández-Yáñez et al, 2021), also known as waste heat power generation, is based on the theory of thermoelectric power generation, that is, using the temperature difference between high and low temperature heat sources, upon which low boiling point working fluid is used as the circulating work fluid. And then, on the basis of Rankine Cycle (RC), the steam generated by the high temperature heat source is heated and evaporated to generate electricity, which can directly convert the heat source into electricity, while the power generation process is vibration-free, pollution-free, highly reliable, long service life, etc.…”

Section: Introductionmentioning

confidence: 99%

Optimal Reconfiguration of Thermoelectric Generation System Under Heterogeneous Temperature Difference

Zheng

Zhang²,

2022

Front. Energy Res.

View full text Add to dashboard Cite

In view of the low efficiency of thermoelectric generation systems in different regions, this paper designs an optimization and reconfiguration of thermoelectric power generation system under heterogeneous temperature difference (HTD) based on particle swarm optimization (PSO) algorithm, so as to make full use of various thermal energy resources and obtain higher electrical output power, which realize multi-directional utilization of energy. In addition, PSO algorithm is a simple optimization strategy with a straightforward operation mechanism and fewer parameters to control during calculation. The research shows that when TEG array is in multiple HTD states, PSO algorithm has a stronger ability to get rid of local optimization, which can reduce power loss and improve energy conversion efficiency. On this basis, PSO algorithm is used to reconfigure the 15 × 15 symmetric TEG array. The experimental simulation analysis based on MATLAB platform is carried out to verify the feasibility of PSO algorithm.

show abstract

Thermal management of thermoelectric generators for waste energy recovery

Cited by 96 publications

References 125 publications

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb_13–xCa_xBaMgSb₁₁ (x = 1–6)

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb_13–xCa_xBaMgSb₁₁ (x = 1–6)

Universality and the thermoelectric transport properties of a double quantum dot system: Seeking for conditions that improve the thermoelectric efficiency

Optimal Reconfiguration of Thermoelectric Generation System Under Heterogeneous Temperature Difference

Contact Info

Product

Resources

About

Thermal management of thermoelectric generators for waste energy recovery

Cited by 96 publications

References 125 publications

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb13–xCaxBaMgSb11 (x = 1–6)

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb13–xCaxBaMgSb11 (x = 1–6)

Universality and the thermoelectric transport properties of a double quantum dot system: Seeking for conditions that improve the thermoelectric efficiency

Optimal Reconfiguration of Thermoelectric Generation System Under Heterogeneous Temperature Difference

Contact Info

Product

Resources

About

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb_13–xCa_xBaMgSb₁₁ (x = 1–6)

Evolution of Thermoelectric Properties in the Triple Cation Zintl Phase: Yb_13–xCa_xBaMgSb₁₁ (x = 1–6)