Thermal performance of linear Fresnel reflecting solar concentrator with trapezoidal cavity absorbers

Singh, Panna Lal; Sarviya, R. M.; Bhagoria, J.L.

doi:10.1016/j.apenergy.2009.08.019

Cited by 146 publications

(54 citation statements)

References 13 publications

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“…Singh PL et al [15,16] analyzed a LFR with trapezoidal cavity receiver, which bundles multiple tubes as absorber. It showed that the thermal efficiency of the solar receiver with round pipe absorber is higher (up to 8%) than rectangular one.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a direct vapor generation supercritical ORC system driven by linear Fresnel reflector solar concentrator

Song

Xiao-hong

et al. 2015

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Performance evaluation of a direct vapor generation supercritical ORC system driven by linear Fresnel reflector solar concentrator

Song

Xiao-hong

et al. 2015

Applied Thermal Engineering

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“…However, for solar process heat or solar thermal cooling applications roof installations may be used requiring compact footprint. The design of the width, shape, spacing, and number of mirror elements of the LFR has been studied by several authors and optimised for various applications [10][11][14][15]. However, those authors chose the spacing arrangement of the mirror elements according to the method by Mathur et al [16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Typically a horizontal type is favoured over a vertical or angled receiver [9][10]. One particular design often utilized is the trapezoidal cavity receiver which comprises partially insulated absorber pipes with a reflector plate and cover glazing forming a cavity for the collection of rays and minimisation of heat losses [11][12].…”

Section: Introductionmentioning

confidence: 99%

Cost-exergy optimisation of linear Fresnel reflectors

Nixon

Davies

2012

Solar Energy

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This paper presents a new method for the optimisation of the mirror element spacing arrangement and operating temperature of linear Fresnel reflectors (LFR). The specific objective is to maximise available power output (i.e. exergy) and operational hours whilst minimising cost. The method is described in detail and compared to an existing design method prominent in the literature. Results are given in terms of the exergy per total mirror area (W/m 2 ) and cost per exergy (US $/W). The new method is applied principally to the optimisation of an LFR in Gujarat, India, for which cost data have been gathered. It is recommended to use a spacing arrangement such that the onset of shadowing among mirror elements occurs at a transversal angle of 45°. This results in a cost per exergy of 2.3 $/W. Compared to the existing design approach, the exergy averaged over the year is increased by 9% to 50 W/m 2 and an additional 122 hours of operation per year are predicted. The ideal operating temperature at the surface of the absorber tubes is found to be 300°C. It is concluded that the new method is an improvement over existing techniques and a significant tool for any future design work on LFR systems.

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“…Considering the requirement of the working fluid outlet temperature and concentration ratio, there are two main types of the receiving devices [12][13][14]. For the high temperature section (350 ∘ C∼400 ∘ C), a metal glass vacuum tube and a CPC secondary reflector are used, which may be more expensive; for a lower temperature section (200 ∘ C∼ 325 ∘ C), a trapezoid cavity receiver is used, which contains a tube bundle on upper surface of the cavity.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector

Lai

Che

et al. 2013

Advances in Mechanical Engineering

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A trapezoidal cavity absorber for a linear Fresnel reflector concentrator is analyzed and optimized via CFD simulation. The heat loss coefficient is introduced; the influences of ambient temperature, absorber temperature, cavity depth, inclination of side walls, insulation thickness, glass window, and emissivity of selective absorption coating have been studied. The results show that radiation dominates the cavity heat loss, and heat loss through the glass window is higher than through the insulation layer; among these factors, impact of emissivity of selective absorption coating and insulation layer is greater than that of the other factors. The simulation results via CFD prove that cavity with a 100 mm depth shows the best thermal performance among the parameters that have been taken into account.

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Thermal performance of linear Fresnel reflecting solar concentrator with trapezoidal cavity absorbers

Cited by 146 publications

References 13 publications

Performance evaluation of a direct vapor generation supercritical ORC system driven by linear Fresnel reflector solar concentrator

Performance evaluation of a direct vapor generation supercritical ORC system driven by linear Fresnel reflector solar concentrator

Cost-exergy optimisation of linear Fresnel reflectors

Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector

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