The “Porcupine”: A Novel High-Flux Absorber for Volumetric Solar Receivers

Karni, Jacob; Kribus, Abraham; Rubin, Rachamim; Doron, P.

doi:10.1115/1.2888060

Cited by 105 publications

(29 citation statements)

References 14 publications

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“…Kribus et al [16] designed and demonstrated the operation of the multistage receiver under elevated temperatures, which divided the aperture into separate stages according to the irradiation distribution, to achieve high working temperature and thermal efficiency. Karni et al [17] designed a volumetric solar receiver, nicknamed Porcupine. They demonstrated the capability of the Porcupine to endure concentrated solar flux of up to 4 MW/m2 and producing exist working fluid temperatures of up to 940 o C. Reddy and Kumar [18] analyzed the heat transfer behaviour of the modified cavity receiver with cone, CPC and trumpet reflector.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins

2015

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This study details the numerical modeling and optimization of natural convection heat suppression in a solar cavity receiver with plate fins. The use of plate fins attached to the inner aperture surface is presented as a possible low cost means of suppressing natural convection heat loss in a cavity receiver. In the first part of the study a three-dimensional numerical model that captures the heat transfer and flow processes in the cavity receiver is analyzed, and the possibilities of optimization were then established. The model is laminar in the range of Raleigh number, inclination angle, plate height and thickness considered. In the second part of the study, the geometric parameters considered were optimized using optimization program with search algorithm. The results indicate that significant reduction on the natural convection heat loss can be achieved from cavity receivers by using plate fins, and an optimal plate fins configuration exit for minimal natural convection heat loss for a given range of Raleigh number. Reduction of up to a maximum of 20% at 0 o receiver inclination was observed. The results obtained provide a novel approach for improving design of cavity receiver for optimal performance.

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Section: Introductionmentioning

confidence: 99%

Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins

2015

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“…For water/steam, molten salt or liquid metal get heat inside absorber tubes in two dimensions, and the heat transfer process between absorber and air takes place in the whole volume. Metal wire/mesh [2], porous ceramic [3] and porcupine ceramic tubes [4] have been tested. Until now, the maximum outlet air temperature is up to 1700 C [4].…”

Section: Introductionmentioning

confidence: 99%

“…Metal wire/mesh [2], porous ceramic [3] and porcupine ceramic tubes [4] have been tested. Until now, the maximum outlet air temperature is up to 1700 C [4]. The silicon carbide ceramic foams fabricated are highly versatile porous materials which are used primarily in catalysts support, molten metal filtration, hot gas filtration, and combustion, etc.…”

Section: Introductionmentioning

confidence: 99%

One dimensional thermal analysis of silicon carbide ceramic foam used for solar air receiver

Bai

2010

International Journal of Thermal Sciences

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“…Hischier et al [87] recommended that a minimisation of the cavity wall thickness in relation with its strength to withstand the operating pressures should be performed. Open volumetric receivers were described by Ávila-Marín [90] and Karni et al [91]. Karni et al [91] presented a "Porcupine" volumetric solar receiver and its ability to withstand a solar flux of up to about 4 MW/m 2 , while producing gas exit temperatures of up to 940 °C.…”

Section: Solar Receivermentioning

confidence: 99%

“…Open volumetric receivers were described by Ávila-Marín [90] and Karni et al [91]. Karni et al [91] presented a "Porcupine" volumetric solar receiver and its ability to withstand a solar flux of up to about 4 MW/m 2 , while producing gas exit temperatures of up to 940 °C. This receiver consists of an array of pinfins or elongated heat transfer elements, implanted in a base plate.…”

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

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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

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The “Porcupine”: A Novel High-Flux Absorber for Volumetric Solar Receivers

Abstract: A new Volumetric (Directly-Irradiated)

Cited by 105 publications

References 14 publications

Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins

Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins

One dimensional thermal analysis of silicon carbide ceramic foam used for solar air receiver

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

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