Experimental validation of a heat transfer model for concentrating photovoltaic system

Kumar, Natarajan Sendhil; Katz, Matty; Ebner, R.; Weingaertner, Simon; Ortrun, Aßländer; Alex, Cole; Wertz, R.; Giesen, T.; Kumar, Mallick Tapas

doi:10.1016/j.applthermaleng.2011.09.031

Cited by 33 publications

(7 citation statements)

References 14 publications

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“…The filling factor is mainly closely related to the non-uniformity of concentration. In the case of non-uniform illumination, the current generated in the highly illuminated central area of the cell flows to the darker edge area through the grid line where the transverse current is generated and the effective series resistance is increased [23,44]. The conversion efficiency is lower than that in the case of current matching and the filling factor also decreases.…”

Section: Output Powermentioning

confidence: 98%

“…They artificially constructed a spectral non-uniform state by placing different filters at both ends of the cell surface and found that the greater the distance between the two regions, the lower the filling factor and open-circuit voltage. Kumar et al [23] explored the effect of cell temperature and concluded that the accumulation of thermal energy raises the temperature of the solar cells which will lead to a reduction in the cell conversion efficiency in turn and mechanical failures on the long-term operation of the cell.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Optical–Electrical–Thermal Coupling on the Performance of High-Concentration Multijunction Solar Cells

et al. 2022

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In the process of high-concentration photovoltaic (HCPV) power generation, multijunction cells work in the conditions of high radiation and high current. Non-uniformity of focusing, the mismatch between the focusing spectrum caused by the dispersion effect and the spectrum of multijunction solar cell design and the increase in cell temperature are the key factors affecting the photoelectric performance of the multijunction solar cell. The coupling effect of three factors on the performance of multijunction solar cell intensifies its negative impact. Based on the previous research, the light intensity and spectral characteristics under Fresnel lens focusing are calculated through the optical model, and the optical–electrical–thermal coupling model under non-uniform illumination is established. The results show that obvious changes exist in the concentration spectrum distribution, energy and non-uniformity along different optical axis positions. These changes lead to serious current mismatch and transverse current in the multijunction solar cell placed near the focal plane which decreases the output power. The lost energy makes the cell temperature highest near the focal plane. In the condition of passive heat dissipation with 500 times geometric concentration ratio, the output power of the solar cell near the focal plane decreases by 35% and the temperature increases by 15%. Therefore, optimizing the placement position of the multijunction cell in the optical axis direction can alleviate the negative effects of optical–electrical–thermal coupling caused by focusing non-uniformity, spectral mismatch and rising cell temperature, and improve the output performance of the cell. This conclusion is verified by the experimental result.

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Section: Output Powermentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effect of Optical–Electrical–Thermal Coupling on the Performance of High-Concentration Multijunction Solar Cells

et al. 2022

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“…An et al [5] deeply analyzed the five sources of heat losses in photovoltaic devices, including Joule heating, thermalization, bulk recombination heating, surface recombination heating, and Peltier heating, through photothermal simulation. Kumar et al [6] studied the influence of battery temperature and concluded that the accumulation of heat energy will increase the temperature of the solar cell, leading to a decrease in conversion efficiency and affecting its lifespan. However, it is difficult to measure the loss of various microscopic mechanisms in the experiment because of the lack of research on the optoelectro-thermal (OET) multi-physical field coupling of concentrating light on the whole solar cell.…”

Section: Introductionmentioning

confidence: 99%

The study of opto-electro-thermal coupling of concentrating solar cell

Zhu¹,

Fu²

2023

International Conference on Optoelectronic Information and Functional Materials (OIFM 2023)

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Solar cells can improve their photovoltaic conversion efficiency and output performance through concentration, but due to the non-ideal nature of concentrators, the uneven distribution of light on the surface of the cell can have negative effects. This can be reduced by adjusting the ratio of concentrator spot size to cell area to decrease the non-uniformity of illumination. Considering the actual temperature effect, the light distribution, carrier generation rate, temperature distribution, and output characteristics were studied using different spot coverage ratio schemes. The study showed that under 200-fold concentration, the maximum power increased by 42.47mW/cm for a concentrator spot coverage ratio of 3x compared to 0.2x, with a decrease in total illumination. Therefore, in practical applications, it is important to consider both the intensity and uniformity of illumination and to choose appropriate geometric concentration ratios and spot coverage ratios to improve solar cell performance.

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“…Numerous studies have sought to find the optimal size of a concentrated PV thermal system with respect to useable energy; however, only a few references have addressed all of the possible system configurations [19,20]. Desideri and Campana [21] and design parameters.…”

Section: Introductionmentioning

confidence: 99%

Parametric performance analysis of a concentrated photovoltaic co-generation system equipped with a thermal storage tank

Hussain

Lee

2015

Energy Conversion and Management

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Experimental validation of a heat transfer model for concentrating photovoltaic system

Cited by 33 publications

References 14 publications

Effect of Optical–Electrical–Thermal Coupling on the Performance of High-Concentration Multijunction Solar Cells

Effect of Optical–Electrical–Thermal Coupling on the Performance of High-Concentration Multijunction Solar Cells

The study of opto-electro-thermal coupling of concentrating solar cell

Parametric performance analysis of a concentrated photovoltaic co-generation system equipped with a thermal storage tank

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