Numerical simulation and experimental analysis of an LCPV/T system under real operating conditions

Chen, Haiping; Liu, Haowen; Zhang, Heng; Liang, Kai; Guo, Xinxin; Yang, Boran

doi:10.1016/j.jclepro.2018.10.256

Cited by 35 publications

(12 citation statements)

References 24 publications

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“…The uncertainty analysis can be calculated by the maximum uncertainty of each parameter; the measured parameters include V I G C m T in T out . The maximum uncertainty of electrical efficiency and thermal efficiency can be calculated as 33,34

\frac{Δ η_{e}}{η_{e}} = \sqrt{{(- \frac{Δ G}{G})}^{2} + {(\frac{normalΔ V}{V})}^{2} + {(\frac{normalΔ I}{I})}^{2}}

\frac{Δ η_{t}}{η_{t}} = \sqrt{{(- \frac{Δ G}{G})}^{2} + {(\frac{normalΔ m}{m})}^{2} + {(- \frac{Δ T_{italicin}}{T_{in}})}^{2} + {(\frac{normalΔ T_{out}}{T_{italicout}})}^{2}}

where Δ η e , Δ η t , Δ G , Δ V , Δ I , Δ T in , Δ T out , Δ m , are the uncertainty of η e , η t , G , V , I , T in , T out , m , respectively.…”

Section: Methodsmentioning

confidence: 99%

Experimental study on active cooling for concentrating photovoltaic cells working at high concentration ratios

Cui

et al. 2021

Int J Energy Res

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Summary Concentrated photovoltaic (CPV) attracts a lot of attention recently because it can achieve much higher efficiency than traditional solar cells by concentrating sunray with an in‐expensive Fresnel lens or parabolic mirror. However, heat dissipation is a critical challenge for CPV solar cells particularly at a high concentration ratio (CR) since the concentrated solar irradiance also results in a large amount of excessive heat. Experimental studies about CPV working at high CR were documented by a few pieces of literature. In this study, the electrical and thermal behavior of active cooling heat sinks with multi‐stage channels for CPV solar cells at both indoor (248× CR) and outdoor (500× and 900× CRs) conditions were comprehensively investigated. The effects of water flow rate, water inlet temperature, season change, and CR on the performance of heat sinks with the different channel numbers and overall size were examined. Convection heat transfer coefficient, electrical, thermal, and cogeneration efficiencies of the heat sinks were evaluated. Results show that the maximum temperature of CPV is significantly reduced as the increase of water flow rate or decreases in the water inlet temperature, meanwhile, the output power is slightly enhanced. The benefits of channel numbers increase are limited, while heat sinks with a cooling area equal to the unpacked cell have higher overall efficiency. Moreover, the convection heat transfer coefficient of the recommended heat sink can reach above 10 kW/(m2 K), with the average CPV cell temperature can be maintained at 63.2°C under 500× CR on Summer Solstice, and 71.4°C under 900× CR on Frost's Descent. Highlights Indoor and outdoor tests of active cooling for CPV cells at high CR were studied. Influences of heat sink designs and operating parameters were analyzed. Convection heat transfer coefficient above 10 kW/(m2 K) is reached. CPV cell average temperature of 63.2°C is achieved on Summer Solstice.

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\frac{Δ η_{e}}{η_{e}} = \sqrt{{(- \frac{Δ G}{G})}^{2} + {(\frac{normalΔ V}{V})}^{2} + {(\frac{normalΔ I}{I})}^{2}}

\frac{Δ η_{t}}{η_{t}} = \sqrt{{(- \frac{Δ G}{G})}^{2} + {(\frac{normalΔ m}{m})}^{2} + {(- \frac{Δ T_{italicin}}{T_{in}})}^{2} + {(\frac{normalΔ T_{out}}{T_{italicout}})}^{2}}

where Δ η e , Δ η t , Δ G , Δ V , Δ I , Δ T in , Δ T out , Δ m , are the uncertainty of η e , η t , G , V , I , T in , T out , m , respectively.…”

Section: Methodsmentioning

confidence: 99%

Experimental study on active cooling for concentrating photovoltaic cells working at high concentration ratios

Cui

et al. 2021

Int J Energy Res

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“…The thermal power (P thermal ) extracted by the HTF is part of the energy balance of Equations ( 20) and (21); it is defined by Equation (39). This model is generally accepted and has been used in different studies: Ji [122], Haiping [83], Xinxin [85], Karathanassis [45] and Herez [25].…”

Section: Thermal Model Of the Htfmentioning

confidence: 99%

A Review of the Modeling of Parabolic Trough Solar Collectors Coupled to Solar Receivers with Photovoltaic/Thermal Generation

Chavarría-Domínguez,

De León-Aldaco,

Velázquez-Limón

et al. 2024

Energies

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This paper is a summary of the last ten years of work on the study of parabolic trough collectors (PTCs) and compound parabolic collectors (CPCs) coupled to photovoltaic and thermal solar receiver collectors (SCR-PVTs). While reviewing the state of the art, numerous review papers were found that focused on conventional solar receiver collector (SRC) technology for solar thermal generation. However, there is a lack of review papers summarizing SRC-PVT hybrid technology for solar electric/thermal generation, which would be beneficial for researchers interested in this area of research. This paper provides a review of SRC-PVT hybrid technologies. The theoretical foundations for analyzing and modeling PTC and CPC concentrators coupled to SRC-PVT are described, with an emphasis on modeling through thermal resistances and energy balances. Additionally, this section provides a concise overview of previous studies that have addressed the modeling of PTC and CPC collectors coupled to SCR-PVT, as well as experimental information useful for the validation of new mathematical models of SRC-PVT.

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“…8-a, each solar single-axis tracking system is made of six LCPV/T modules in series. The detailed mechanism of thermal transfer is summarized in [2]. In this study, polycrystalline silicon solar cells are used.…”

Section: B Experimental Systemmentioning

confidence: 99%

“…As shown in Fig. 9, the size of the slice cell is 0.156*0.039 m 2 . In addition, the design concentration ratio is 4.…”

Section: B Experimental Systemmentioning

confidence: 99%

“…The experimental result showed that the electric power and thermal power of the system with 4 times concentrating were 3 times and 1.9-2 times of the non-concentrating system, respectively. Moreover, the changing trend of power and efficiency of solar photovoltaic/thermal system's thermal and electrical with low-concentrating in operation was examined by Chen Haiping [2]. In addition, the solar single-axis and dual-axis tracking system adjust the position and angle of PV panels and the sun.…”

Section: Introductionmentioning

confidence: 99%

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Performance Comparison of Solar Single-Axis Tracking Low-Concentrating Photovoltaic/Thermal System With Different Axes

et al. 2021

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The study focuses on the performance comparison of solar single-axis tracking lowconcentration photovoltaic/thermal (LCPV/T) system with different axes. The axes of the single-axis tracking LCPV/T systems are arranged along the east-west (EW) axis, north-south (NS) axis, and southeast 18° (SE-18°) axis, respectively. The thermal performance of the single-axis tracking system with different axes is discussed through simulated and experimental methods. Simulation study shows that the EW tracking system receives the highest amount of radiation and produced highest electrical energy throughout the year. The experimental research demonstrates that low-concentrating technology significantly improves the performance of the system. Chiefly, the overall thermal efficiency maintains between 50%-70%, and the maximum thermal efficiency achieved in the experiment reaches 68%. The average overall efficiency and exergy efficiency of the NS axis, EW axis and SE-18° axis are 59% and 20%, 64% and 23%, 59% and 20%, respectively. Both the energy and exergy performance of the EW axis is better than the other two axes. The placement of the axis has a significant impact on the thermal and electrical performance of the LCPV/T system. Consequently, the combination of low-concentrating and single-axis tracking technologies has an excellent prospect in practical application.

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Numerical simulation and experimental analysis of an LCPV/T system under real operating conditions

Cited by 35 publications

References 24 publications

Experimental study on active cooling for concentrating photovoltaic cells working at high concentration ratios

Experimental study on active cooling for concentrating photovoltaic cells working at high concentration ratios

A Review of the Modeling of Parabolic Trough Solar Collectors Coupled to Solar Receivers with Photovoltaic/Thermal Generation

Performance Comparison of Solar Single-Axis Tracking Low-Concentrating Photovoltaic/Thermal System With Different Axes

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