Radiative properties of a solar cavity receiver/reactor with quartz window

Shuai, Yong; Wang, Fuqiang; Xia, Xin‐Lin; Tan, He‐Ping; Ying-chun, Liang

doi:10.1016/j.ijhydene.2011.07.013

Cited by 70 publications

(10 citation statements)

References 18 publications

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“…The first step is to verify the flux distribution on the focal plane of Jeter's model [25] by using the OptisWorks simulation software based on MCRT. Through the comparison between the results of the OptisWorks simulation and Jeter's calculation [27], it is found that the two methods are highly consistent, and the verification process is shown in the previous work of the same research group [23]; the present paper will not elaborate. Because the receiver in the SDCR system analyzed in this paper is a cavity receiver with a quartz window, the model with a quartz window must be further verified by the method mentioned above.…”

Section: Methodology and Model Validationsupporting

confidence: 51%

“…Currently, the quartz windows that have been successfully applied are mainly planar [18,19], hemispherical [20,21], and semielliptical quartz windows [22] with equal thickness. Shuai et al [23] designed a planoconvexo quartz window on a cavity receiver. The research showed that the redistribution effect of the convex quartz window on the solar radiation can also improve the uniformity of the flux distribution on the receiver surface, but their research did not involve the detailed influence of the concave quartz window on the flux distribution of the receiver.…”

Section: Introductionmentioning

confidence: 99%

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Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window

Nie

Peng

Yan

et al. 2020

International Journal of Photoenergy

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A nonuniform and high-strength heat flux load would reduce the working efficiency, safety, and in-service life of a cavity receiver. Four types of concave quartz windows, including conical, spherical, sinusoidal, and hyperbolic tangent, were proposed to be used in the cylindrical cavity receiver of a solar dish concentrator system, which can improve the flux uniformity and reduce the peak concentration ratio of the receiver. For each concave quartz window, 36 structural schemes were offered. Based on the Monte Carlo ray-tracing method, the results showed that the nonuniformity coefficient of the receiver was 0.68 and the peak concentration ratio was 1320.21 by using a plane quartz window. At the same time, when the receiver is in the best optical performance, it is the receiver with sinusoidal, conical, spherical, and hyperbolic tangent quartz windows, respectively. The optical efficiency of the receiver with the above four types of quartz windows was basically the same as that of the receiver with the plane quartz window, but their nonuniformity coefficients were reduced to 0.31, 0.35, 0.36, and 0.39, respectively, and the peak concentration ratio was reduced to 806.82, 841.31, 853.23, and 875.89, respectively. Obviously, the concave quartz window was better than the plane quartz window in improving the flux uniformity. Finally, a further study on the sinusoidal quartz window scheme of all of the above optimal parameter schemes showed that when the installation position of the receiver relative to the dish concentrator was changed, the flux uniformity of the receiver could continue to improve. When the surface absorptivity of the receiver was reduced, the optical efficiency would be reduced. For the parabolic dish concentrator with different focal distance, the concave quartz window can also improve the uniformity of the flux distribution of the cylindrical cavity receiver.

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Section: Methodology and Model Validationsupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window

Nie

Peng

Yan

et al. 2020

International Journal of Photoenergy

View full text Add to dashboard Cite

show abstract

“…Uniformity can be significant for receivers achieving local flux densities up to 90 kW/m 2 [73,74], while cavities of non-classical shapes can attain more uniform flux distributions [75]. Secondary concentration by means of plano-convex windows is also used to increase attainable in-cavity temperature [76]. The increased radiative heat-loss at high flux intensities can be reduced with air curtain designs.…”

Section: Advances In Volume Receiversmentioning

confidence: 99%

Concentrating Solar Power Advances in Geometric Optics, Materials and System Integration

Arnaoutakis

Katsaprakakis

2021

Energies

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In this paper, the technological advances in concentrating solar power are reviewed. A comprehensive system approach within this scope is attempted to include advances of highly specialized developments in all aspects of the technology. Advances in geometric optics for enhancement in solar concentration and temperature are reviewed along with receiver configurations for efficient heat transfer. Advances in sensible and latent heat storage materials, as well as development in thermochemical processes, are also reviewed in conjunction with efficient system integration as well as alternative energy generation technologies. This comprehensive approach aims in highlighting promising concentrating solar power components for further development and wider solar energy utilization.

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“…Tan et al (2015) studied numerically the influence of aerowindow on the performance of SPSR and found that an aerowindow could significantly improve the efficiency of solar receivers. Yong et al (2011) installed a quartz glass window to separate the internal and external flow fields of a solar receiver at its aperture. Although a quartz glass window could effectively solve issues brought about by wind, it was very expensive due to large-area high transparency.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on influence of wind on thermal performance of a solid particle solar receiver

Wang

et al. 2022

Front. Energy Res.

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The effects of wind speed and wind attacking angle on the thermal performance of a solid particle solar receiver (SPSR) are studied by numerical simulation. In addition, the effect of aerowindow on the efficiency of the solar receiver is also explored. The results show that under different wind speeds and attack angles, wind can differently prevent hot air from flowing out and carry cold air into the solar receiver. These two effects compete with each other, resulting in the complex influence law of wind on receiver efficiency. Generally, the increasing wind speed will eventually lead to a negative effect on the thermal efficiency of the receiver. At the incident radiation aperture, the aerowindow formed by the air nozzle can effectively reduce convection heat loss and significantly improve the receiver efficiency. Under the simulation conditions of the present study, there is an optimal air jet velocity to maximize the protection effect of the aerowindow. The heat receiver efficiency increases from 41.7 to 58.2% when the wind is 2.5 m/s and the wind attacking angle is 135°. In the analysis of the energy balance inside the solar receiver, the proportion of radiation heat loss is about one-third, and it is not affected by the aerowindow. Thus, reducing radiation heat loss is very important for further improving the receiver’s efficiency of SPSR.

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Radiative properties of a solar cavity receiver/reactor with quartz window

Cited by 70 publications

References 18 publications

Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window

Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window

Concentrating Solar Power Advances in Geometric Optics, Materials and System Integration

Numerical study on influence of wind on thermal performance of a solid particle solar receiver

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