Radiation performance of dish solar concentrator/cavity receiver systems

Shuai, Yong; Xia, Xin‐Lin; Tan, He‐Ping

doi:10.1016/j.solener.2007.06.005

Cited by 251 publications

(109 citation statements)

References 4 publications

Supporting

Mentioning

101

Contrasting

Unclassified

Order By: Relevance

“…Considering that errors behave as random variables with normal distributions, the irregularities at the concentrator surface can be characterized by the standard deviation σ [8]. In [10] it is pointed out that σ = 3.45mrad whereas in [8] σ = 6.7mrad. We choose this uncertain value to be the former, since it is considered to yield a more representative focal flux distribution of that observed in the concentrator already deployed.…”

Section: A Sunlight and Optical Errorsmentioning

confidence: 99%

Radiation performance of a cavity receiver for a parabolic dish solar concentrator system

López¹,

Arenas²,

Baños³

2016

REPQJ

View full text Add to dashboard Cite

Abstract. The radiation performance of a modified cavity receiver for a low-cost concentrating solar power plant is studied. The optical phenomenon taking place is modelled by using a ray tracing technique based on a finite element approach. This design is also compared to a flat receiver. Corrections for sunlight and optical errors of the parabolic dish are included. Its efficiency is analysed by varying some geometrical parameters of the receiver, maximizing the total power absorbed. It is found that the flux density on the cavity walls is less than on the flat receiver walls, hence decreasing heat losses. Also, in order to reach a maximum radiation performance the receiver is to be placed closer to the concentrator from the focal position. However, the aperture does not improve notably its efficiency, although it has an important role in the convection heat losses as shown in previous works. Finally by varying the cavity diameter it is possible to improve the efficiency when it is well adjusted to the radiation performance of the concentrator on the focal point.

show abstract

Section: A Sunlight and Optical Errorsmentioning

confidence: 99%

Radiation performance of a cavity receiver for a parabolic dish solar concentrator system

López¹,

Arenas²,

Baños³

2016

REPQJ

View full text Add to dashboard Cite

show abstract

“…The performance of different cavity receivers was investigated by various authors [92,95,96]. Shuai et al [92] investigated different classical cavity geometries and found that the shape of the cavity (geometry) has a significant effect on the overall distribution of the radiation flux in the cavity receiver. According to Shuai et al [92], an upside-down pear cavity might be an appropriate shape.…”

Section: Solar Receivermentioning

confidence: 99%

“…Shuai et al [92] investigated different classical cavity geometries and found that the shape of the cavity (geometry) has a significant effect on the overall distribution of the radiation flux in the cavity receiver. According to Shuai et al [92], an upside-down pear cavity might be an appropriate shape. Prakash et al [95] investigated heat losses from a cavity receiver at different inclination angles, with frontal and side winds.…”

Section: Solar Receivermentioning

confidence: 99%

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Roux

Bello‐Ochende

Meyer

2013

Renewable and Sustainable Energy Reviews

View full text Add to dashboard Cite

Many studies have been published on the performance and optimisation of the Brayton cycle and solar thermal Brayton cycle showing the potential, merits and challenges of this technology. Solar thermal Brayton systems have potential to be used as power plants in many sun-drenched countries. It can be very competitive in terms of efficiency, cost and environmental impact. When designing a system such as a recuperative Brayton cycle there is always a compromise between allowing effective heat transfer and keeping pressure losses in components small. The high temperatures required in especially the receiver of the system presents a challenge in terms of irreversibilities due to heat loss. In this paper, the authors recommend the use of the total entropy generation minimisation method. This method can be applied for the modelling of a system and can serve as validation when compared with first-law modelling. The authors review various modelling perspectives required to develop an objective function for solar thermal power optimisation, including modelling of the sun as an exergy source, the Gouy-Stodola theorem and turbine modelling.With recommendations, the authors of this paper wish to clarify and simplify the optimisation and modelling of the solar thermal Brayton cycle for future work. The work is applicable to solar thermal studies in general but focuses on the small-scale recuperated solar thermal Brayton cycle.2

show abstract

“…Hence, a relatively homogeneous temperature distribution on the absorber surface of the cavity receiver is one of the most important design objectives. In previous works, most of the attention has been focused on the cavity geometrical optimization to achieve a relatively uniform light flux distribution [2]. This study proposes an attempt to optimize the shape of a cavity receiver and concentrator based on fulfilling the requirements of flux distribution on the receiver walls set by the designer of the hybrid receiver.…”

Section: Introductionmentioning

confidence: 99%

Optical design and optimization of parabolic dish solar concentrator with a cavity hybrid receiver

Blazquez

Carballo

Silva

2016

AIP Conference Proceedings

View full text Add to dashboard Cite

Radiation performance of dish solar concentrator/cavity receiver systems

Cited by 251 publications

References 4 publications

Radiation performance of a cavity receiver for a parabolic dish solar concentrator system

Radiation performance of a cavity receiver for a parabolic dish solar concentrator system

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Optical design and optimization of parabolic dish solar concentrator with a cavity hybrid receiver

Contact Info

Product

Resources

About