Inconsistent phenomenon of thermoelectric load resistance for photovoltaic–thermoelectric module

Li, Guiqiang; Zhou, Kai; Song, Zhiying; Zhao, Xudong; Ji, Jie

doi:10.1016/j.enconman.2018.01.079

Cited by 71 publications

(31 citation statements)

References 22 publications

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“…This is in line with what was reported in previous electrical hybridization studies [9,16,[20][21][22][23]. The behavior shown in Figure 2 also indicates that there is a minimum (and therefore a minimum ∆T) capable of compensating the decrease of the PV filling factor, giving thus = 1.…”

Section: Lossless Conditionssupporting

confidence: 79%

“…However, in this case their conclusions cannot be extended beyond the case of silicon PVs and to a specific set of TEGs. Similar remarks also apply to the interesting papers by Li et al [22] and by Verma et al [23]. The former discussed the optimal load resistance for the case of hybridized GaAs and silicon solar cells, and the latter proposed a maximum power point tracking (MPPT) system.…”

Section: Introductionmentioning

confidence: 67%

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Suitability of the Electrical Coupling in Solar Cell Thermoelectric Hybridization

Lorenzi¹,

Acciarri²,

Narducci³

2018

Preprint

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Abstract:It is well known that the major constraints to the efficiency of photovoltaic devices come from the generation of heat. In this context, thermoelectric generators have been proposed as a viable heat recovery solution, leading to an increase of the overall efficiency. Within this kind of hybrid solution, the photovoltaic and thermoelectric parts can be either electrically separated or connected in the same circuit. In the latter case, the presence of the thermoelectric generator in series to the solar cell may lead to electrical losses. In this work, we analyze the effect of several parameters on the output power of electrically hybridized thermoelectric-photovoltaic systems. Both electrical measurements and simulations are used. The results show that while an electrical lossless condition exists (as also reported in previous works), it does not necessarily lead to significant power gains compared to the sole photovoltaic case. In addition, the strong temperature sensitivity of the lossless condition makes electrical hybridization difficult to implement. Since solar irradiation varies over time, such sensitivity would make the system work mostly in a suboptimal regime. Therefore, this study provides clues on the actual applicability of electrically hybridized devices.

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Section: Lossless Conditionssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 67%

Suitability of the Electrical Coupling in Solar Cell Thermoelectric Hybridization

Lorenzi¹,

Acciarri²,

Narducci³

2018

Preprint

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“…Compared with the traditional one, this system enhanced the cooling performance by 27%. In terms of electrical characteristic, the electric feature synergy in the PV‐TE was investigated, and the inconsistent TE load resistance in PV‐TE module was also demonstrated . Yin et al took a comprehensive experiment and optimization on a solar concentrating PV‐TE module.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of electrical characteristic, the electric feature synergy in the PV-TE was investigated, 10 and the inconsistent TE load resistance in PV-TE module was also demonstrated. 11 Yin et al 12 took a comprehensive experiment and optimization on a solar concentrating PV-TE module. For operation and design optimization, the impacts of the optical concentration ratio on the module characteristic, the effects of the PV output parameters such as the voltage and the TE load resistance on the temperature and the output power, and the electric connection ways (series or parallel) of Thermoelectric coolor (TEC) were all illustrated.…”

Section: Introductionmentioning

confidence: 99%

Simulation and experiment of a PV‐MCHP‐TE system and ambient parameters impacts

Zhou

Liu

2020

Int J Energy Res

Self Cite

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Summary Combining the photovoltaic (PV) with the thermoelectric (TE) can obtain higher electrical outputs, because the thermal energy produced by the PV cells can be used to produce more electricity by the TE device. This paper built the mathematical model on the energy flow of the PV–microchannel heat pipe (MCHP)–TE system then verified the correctness of the model via the experiment. In addition, the impacts of the different wind speed, different solar radiation, and different ambient temperature on the PV‐MCHP‐TE system have been analysed. The result shows that the maximum difference value of the power output between the simulation and experiment is 0.16 W, so the simulated values and experimental values are in good agreement. At the same time, within the scope of the ambient parameters set in the simulation, when the solar radiation raises, the electrical efficiency of the PV‐MCHP‐TE system decreases, but when the wind speed raises, the electrical efficiency of this system will decrease more and more slowly. This work will lay the foundation for the performance forecasting of the system throughout the year.

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“…On the other hand, cost efficiency of photovoltaic is strongly decreased by stabilizers and other devices ensuring high quality of the obtained electricity. Efficiency of photovoltaic is also highly dependent on load resistance [3,4]. For heating of water load resistance can be used optimal for the photovoltaic and without any converters and stabilizers.…”

Section: Introductionmentioning

confidence: 99%

Use of PV panels for water heating in Ulbroka research centre

Pelece

Ziemelis

Putans

et al. 2018

Engineering for Rural Development

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Solar energy has been widely used not only in southern countries, but also in Latvia. In Latvia solar energy has been used mainly for heating of water and/or air in summer. In the Ulbroka Research Centre starting with summer of 2008 the vacuum tube solar collector Vitosol 200 SD2 is used for water heating in summer, when the central heating system does not work. Area of this collector is 3m 2 , and it works with 300 l hot water reservoir Vitocell B-100 CVB. Such collector satisfied the demand for hot water till 2013, when severe hail damaged the vacuum tubes of the collector. 9 tubes from 30 were broken. Now we propose photovoltaic (PV) panels for water heating. PV panels have some advantages in comparison with solar collectors: there is no need of the complicated system of heat exchanging and transporting of the heat from the roof of the house, where the solar collector is situated, to the rooms, where the hot water is used; there cooling is not going on, when the sun is covered by clouds; the heating power does not depend on the temperature in the hot water reservoir; it is more simple to ensure tracking to the sun for PV panels than for the solar collector. Measurements of water heating capacity of both stationary and sun tracking PV panels have been done to find out the necessary area of PV panels to satisfy the demand for hot water in the Ulbroka Research Centre. It was obtained that two PV panels Solet 60.6-WF-250, mounted on the tracker ensuring all day perpendicular striking of direct solar beams on the panel's surface, produce in average 4.66 kWh daily in summer. Such amount of energy is sufficient to warm 150 l of water to 26 Celsius degrees.

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Inconsistent phenomenon of thermoelectric load resistance for photovoltaic–thermoelectric module

Cited by 71 publications

References 22 publications

Suitability of the Electrical Coupling in Solar Cell Thermoelectric Hybridization

Suitability of the Electrical Coupling in Solar Cell Thermoelectric Hybridization

Simulation and experiment of a PV‐MCHP‐TE system and ambient parameters impacts

Use of PV panels for water heating in Ulbroka research centre

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