An effective method for hot spot temperature optimization in heat conduction problem

Zhang, Jiajun; Wu, Xiaoling; Song, Mengxuan; Chen, Kai

doi:10.1016/j.applthermaleng.2023.120325

Cited by 11 publications

(3 citation statements)

References 32 publications

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“…However, a lower forward voltage means a higher leakage current, raising the risk of thermal runaway. 48 Thus, the bypass diodes must conduct when one cell is shaded, and the shaded cell must be operating under its breakdown voltage. 48 In 2018, Shin et al, 49 studied the effect of operating conditions on the photovoltaic parameters of installed bypass diode on the back side of PV module in a closed junction box.…”

Section: Minimization and Prevention Of Shaded Cell And Hotspot Lossmentioning

confidence: 99%

“…48 Thus, the bypass diodes must conduct when one cell is shaded, and the shaded cell must be operating under its breakdown voltage. 48 In 2018, Shin et al, 49 studied the effect of operating conditions on the photovoltaic parameters of installed bypass diode on the back side of PV module in a closed junction box. The result gives insight into an easy heat dissipation and leakage current monitoring method under high temperature when designing a bypass diode junction box.…”

Section: Minimization and Prevention Of Shaded Cell And Hotspot Lossmentioning

confidence: 99%

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Influence of outdoor conditions on PV module performance – an overview

Ravindra¹,

Lin²,

Bora³

et al. 2023

MSEIJ

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The utilization of renewable sources of energy is of significant interest today. This is particularly the case due to the growing interest in addressing global warming, carbon footprint and the associated challenges for the environment. In this context, the enhanced use of solar panels is relevant and timely. With a view to understand and appreciate the fundamentals of the workings of the solar panels and the influence of the outdoor weather-related parameters on their operational characteristics, a study is presented in this paper. A detailed procedure for performance measurement of PV modules in outdoor conditions is reported. Improvement in the precision of outdoor performance measurements of photovoltaic (PV) modules is investigated for a wide range of outdoor conditions. A comparative performance evaluation of the currently available PV modules under the influence of humidity, irradiance and particle radiation is presented. PV parameters show strong dependence on these outdoor conditions. The instability in solar cell modules when reacting with water or under high humidity inhibits the high performance of solar cell modules. Irradiation results depict that the silicon-based PV modules show a decreasing trend of power conversion efficiency with increasing solar irradiance. The efficiency increases with increased solar irradiance for CdTe, GaAs and CIGS solar cells in the irradiance range of 200 to 1000 W•m-2. Tandem and multi-junction solar cells exhibit a high-power conversion efficiency when the solar irradiance increases from 0 - 70 suns. Perovskite solar cells have better particle radiation tolerance than silicon, III-V and CIGS solar cells. The shading problem is discussed briefly for solar cell modules. This study is aimed to provide valuable and comparable information on the degradation performance of solar cells as function of humidity, irradiance and particle radiation, and serves as the basis for future development.

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Section: Minimization and Prevention Of Shaded Cell And Hotspot Lossmentioning

confidence: 99%

Section: Minimization and Prevention Of Shaded Cell And Hotspot Lossmentioning

confidence: 99%

Influence of outdoor conditions on PV module performance – an overview

Ravindra¹,

Lin²,

Bora³

et al. 2023

MSEIJ

View full text Add to dashboard Cite

show abstract

“…In the field of electronic device cooling, heat sinks are important for thermal management, because heat can dissipate quickly to ensure the normal operation of core components. It is also necessary to optimize the heat conductive path and composite material layout [11,20]. In the field of solid-state refrigeration, materials with a high caloric effect have a low thermal conductivity and require the insertion of high-thermal-conductivity materials to improve heat transfer from the substrate to cold/hot ends and heat regeneration between substrates, thus establishing an adequate temperature span and achieving a sufficient cooling performance [12,21].…”

Section: Introductionmentioning

confidence: 99%

Equivalent Thermal Conductivity of Topology-Optimized Composite Structure for Three Typical Conductive Heat Transfer Models

Lu,

2024

Energies

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Composite materials and structural optimization are important research topics in heat transfer enhancement. The current evaluation parameter for the conductive heat transfer capability of composites is effective thermal conductivity (ETC); however, this parameter has not been studied or analyzed for its applicability to different heat transfer models and composite structures. In addition, the optimized composite structures of a specific object will vary when different optimization methods and criteria are employed. Therefore, it is necessary to investigate a suitable method and parameter for evaluating the heat transfer capability of optimized composites under different heat transfer models. Therefore, this study analyzes and summarizes three typical conductive heat transfer models: surface-to-surface (S-to-S), volume-to-surface (V-to-S), and volume-to-volume (V-to-V) models. The equivalent thermal conductivity ( ) is proposed to evaluate the conductive heat transfer capability of topology-optimized composite structures under the three models. A validated simulation method is used to obtain the key parameters for calculating . The influences of the interfacial thermal resistance and size effect on are considered. The results show that the composite structure optimized for the V-to-S and V-to-V models has a value of only 79.4 W m−1 K−1 under the S-to-S model. However, the values are 233.4 W m−1 K−1 and 240.3 W m−1 K−1 under the V-to-S and V-to-V models, respectively, which are approximately 41% greater than those of the in-parallel structure. It can be demonstrated that is more suitable than the ETC for evaluating the V-to-S and V-to-V heat transfer capabilities of composite structures. The proposed can serve as a characteristic parameter that is beneficial for heat transfer analysis and composite structural optimization.

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