Power generation of a thermoelectric generator with phase change materials

Jo, Sung Eun; Kim, Myoung Soo; Kim, Min Ki; Kim, Yong Jun

doi:10.1088/0964-1726/22/11/115008

Cited by 25 publications

(4 citation statements)

References 16 publications

(21 reference statements)

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“…The sensors in such networks are usually battery-powered, which is environmentally harmful and shortperiod [1]. Harvesting energy from surroundings has demonstrated the potential to replace batteries in WSN applications [2][3][4][5][6][7][8], while vibration energy has also attracted the attention of several scientists, because of its prevalence in the environment as a form of waste energy.…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis and general characteristics for nonlinear vibration energy harvesters

Wu¹,

Tao²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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In this paper, we present a systematic theoretical and numerical study of the output performance of nonlinear energy harvesters. The general analytical expression of output power for systems with different combinations of nonlinear stiffness and nonlinear damping, as well as symmetrical and asymmetrical systems, have been derived based on harmonic balance method, observing compliance with numerical results. We theoretically prove that there is a limit power for all nonlinear systems which is determined exclusively by the vibrator mass, excitation acceleration, and mechanical damping. The results also indicate that for symmetrical stiffness systems, the asymmetrical damping components have no effect on the output performance. Additionally, we derived semi-analytical solutions of the matching loads and numerically investigated the influence of nonlinear coefficients on the output power with matched load. When the load matches device parameters and is much larger than the internal resistance, the equivalent time-average damping is equal to the mechanical damping. Although the matching load and output power vary with the nonlinear coefficients, the normalized power and matching resistance ratio follow a power function, named matching power line, which is independent of the structural parameters. With the improvement of the equivalent time-average short-circuit damping in the vibration range, the normalized power moves to the right end of the matching power line, and the output power approach to the limit power. These conclusions provide general characteristics of nonlinear energy harvesters, which can be used to guide the design and optimization of energy harvesters.

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Section: Introductionmentioning

confidence: 99%

Theoretical analysis and general characteristics for nonlinear vibration energy harvesters

Wu¹,

Tao²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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“…PN TEGs are utilized as thermoelectric devices and two different PCM composites are connected to each side of PN TEGs [ 43 ]. PN TEGs possess a hot side and a cold side due to the internal structure of the N and P type semiconductors [ 44 , 45 ]. The electrons doped in the N type semiconductor start the excitation while absorbing the external thermal energy and move to the P type semiconductor [ 46 , 47 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermoelectric Energy Harvesting with Graphene Aerogel-Supported Form-Stable Phase Change Materials

Song

2021

Nanomaterials

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Graphene aerogel-supported phase change material (PCM) composites sustain the initial solid state without any leakage problem when they are melted. The high portion of pure PCM in the composite can absorb or release a relatively large amount of heat during heating and cooling. In this study, these form-stable PCM composites were used to construct a thermoelectric power generator for collecting electrical energy under the external temperature change. The Seebeck effect and the temperature difference between the two sides of the thermal device were applied for thermoelectric energy harvesting. Two different PCM composites were used to collect the thermoelectric energy harvesting due to the different phase transition field in the heating and cooling processes. The graphene nano-platelet (GNP) filler was embedded to increase the thermal conductivities of PCM composites. Maximum output current was investigated by utilizing these two PCM composites with different GNP filler ratios. The thermoelectric energy harvesting efficiencies during heating and cooling were 62.26% and 39.96%, respectively. In addition, a finite element method (FEM) numerical analysis was conducted to model the output profiles.

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“…A single IT-TEG could generate a maximum instantaneous power of 2.08 mW in the process of SSAT phase change transition. Jo et al [17] proposed a TEG which was embedded with PCM for harvesting wasted heat energy. The experimental results showed that the TEG could continue generate electrical energy when the heat source was removed by the heat energy stored in the PCM.…”

Section: Introductionmentioning

confidence: 99%

Effect of geometrical structure of embedded phase change material on the power generation of thermoelectric module

Liu¹,

Wu²,

Xie³

et al. 2018

THERM SCI

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Original scientific paper https://doi.org/10.2298/TSCI170215167AThe effect of geometrical structure of embedded phase change material (PCM) on the power generation of the thermoelectric module (TEM) was studied in this work. Paraffin wax with different geometrical structure was embedded in a polymer container which is adhered to the hot junction of the fabricated TEM. Since the PCM can used as the heat source and provide latent heat when the heat source stops providing heat, applying the PCM in the TEM is an efficiency method to enhance the power generation of the TEM. Our experimental results show that the energy harvesting time becomes 60 seconds longer in comparison with the case without the PCM when 4.3 g weight of paraffin wax is applied. At the same time, the power generation of the TEM increases by magnitude of 25%. Moreover, the output voltage and electrical energy generation of TEM with PCM increase with increasing both cross-area and height of the applied PCM.

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Power generation of a thermoelectric generator with phase change materials

Cited by 25 publications

References 16 publications

Theoretical analysis and general characteristics for nonlinear vibration energy harvesters

Theoretical analysis and general characteristics for nonlinear vibration energy harvesters

Analysis of Thermoelectric Energy Harvesting with Graphene Aerogel-Supported Form-Stable Phase Change Materials

Effect of geometrical structure of embedded phase change material on the power generation of thermoelectric module

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