Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux

Kawasaki, Kota; Nakakura, Mitsuho; Matsubara, Koji

doi:10.1299/jtst.2020jtst0018

Cited by 2 publications

(1 citation statement)

References 19 publications

(26 reference statements)

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“…This research focused on solar power generation (SPG) systems. SPG is widely used in daily life, including electric vehicle charging stations [1], electric vehicles [2], energy storage systems [3], street lights [4], electric water heaters [5], artificial satellites [6], household electricity [7][8][9][10], heating equipment [11,12], renewable energy hybrid systems [13,14], etc.…”

Section: Introductionmentioning

confidence: 99%

Novel Global-MPPT Control Strategy Considering the Variation in the Photovoltaic Module Output Power and Loads for Solar Power Systems

Lin

Huang

et al. 2022

Processes

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This research proposed a novel global maximum power point tracking (global-MPPT) algorithm. The proposed algorithm eliminates the perturbation and observation (P&O) technique disturbance problem that the power point will be stuck at the local peak power point under a partial shading condition (PSC). The proposed global-MPPT algorithm detects the photovoltaic module (PV-M) environment irradiance level by the relationship between the output power and voltage of the PV-M. In the proposed algorithm, the important parameter w is determined by the PV-M output power and irradiance level, which is also the compensation parameter that corresponds to the relationship of temperature. The proposed global-MPPT algorithm is aimed to predict the best duty cycle of the global-MPPT based on the irradiance level, parameter w, PV-M output voltage, and load, and then achieve the maximum power point (MPP) quickly and accurately. The measurement results under UIC and PSC verify that the proposed global-MPPT technique performs better than the particle swarm optimization (PSO) and P&O techniques. This research contributes to the proposed method that can find the global-MPP in time based on the irradiance level, temperature, and load.

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Section: Introductionmentioning

confidence: 99%

Novel Global-MPPT Control Strategy Considering the Variation in the Photovoltaic Module Output Power and Loads for Solar Power Systems

Lin

Huang

et al. 2022

Processes

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Conjugate radiation-convection-conduction simulation of cubic lattice solar receiver with high porosity for high-temperature heat absorption

Maruyama

OCHIAI

Nakakura

et al. 2022

JTST

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Direct simulation was performed for the solar porous receiver having cubic lattice as elementary structure with high porosity (0.80 -0.98). The cell size was changed in four steps from 0.49 mm to 2.94 mm at three levels of the power over air mass (POM). Silicon carbide (SiC) was assumed as receiver material, and the absorptivity of the wall surface was assigned 0.9. The numerical data for the porous receiver was compared with the honeycomb receiver with low porosity. Such comparison proved the superiority of the highly porous receiver: the receiverexit temperature and the receiver efficiency surpass those of honeycomb receiver at the same level of POM. Regarding the size effects, the performance of the porous receiver improves as the cell size reduces. When the cell size is 0.98 mm at POM =1000 kJ/kg, the receiver exit temperature increases beyond 1000 K and the receiver efficiency 0.8. When the cell size is 0.49 mm at POM = 2000 kJ/kg, the receiver exit temperature exceeds 1700 K and the efficiency 0.8. The numerical results thus demonstrated that the smaller cell size maintains the efficiency at the higher levels of POM. The mechanism for superiority of the small cell size was investigated through analysis of the heat transfer loss. This investigation revealed that the convective heat transfer enhancement in the case of small cell size decreases the temperature in the inlet region and attenuates the thermal radiation loss. Therefore, the high performance of the small-cell size receiver is attributed to the cooling effect of the air stream with high heat transfer coefficient.

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Conjugate simulation of solar honeycomb receiver for high temperature heat absorption at constant incident heat flux

Cited by 2 publications

References 19 publications

Novel Global-MPPT Control Strategy Considering the Variation in the Photovoltaic Module Output Power and Loads for Solar Power Systems

Novel Global-MPPT Control Strategy Considering the Variation in the Photovoltaic Module Output Power and Loads for Solar Power Systems

Conjugate radiation-convection-conduction simulation of cubic lattice solar receiver with high porosity for high-temperature heat absorption

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