Summary report:  concentrating solar collector test results, Collector Module Test Facility

Dudley, V.E.; Workhoven, R.M.

doi:10.2172/7012726

Cited by 12 publications

(8 citation statements)

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“…and shows how this factor must be combined with an• end-loss factor to account for spilling of radiation over the end in line focus collectors of finite length. The method is illustrated with test results for parabolic troughs that have been obtained at Sandia Laboratories (5) and SERI.…”

Section: I~itroduc':'ionmentioning

confidence: 99%

Incidence-Angle Modifier and Average Optical Efficiency of Parabolic Trough Collectors

Gaul

Rabl

1980

Journal of Solar Energy Engineering

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The incidence-angle modifier for parabolic troughs is investigated in order to clarify the connection between collector tests and prediction of long-term energy delivery by collector arrays. The optical efficiency of a parabolic trough collector decreases with incidence angle for several reasons: the decreased transmission of the glazing and the absorption of the absorber; the increased width of the solar image on the receiver; and the spillover of the radiation from troughs of finite length. In order to be able to apply test results from a short collector module to collector arrays of arbitrary length, it is necessary to separate analytically the end loss from the first two effects. This analysis is applied to several collectors that have been tested at Sandia Laboratories and at the Solar Energy Research Institute (SERI). The measurements of the incidence-angle modifier at SERI were, carried out at low temperature with an open water test loop for improved accuracy. The results are presented in two forms: as a polynomial fit to the data; and as a single number, the all-day average optical efficiency for typical operating conditions.

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Section: I~itroduc':'ionmentioning

confidence: 99%

Incidence-Angle Modifier and Average Optical Efficiency of Parabolic Trough Collectors

Gaul

Rabl

1980

Journal of Solar Energy Engineering

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“…The SRTA has been analyzed in several studies [3][4][5]. The FMSC was analyzed during the 1970s [6][7][8][9], and recently the authors of this paper presented an optical study using a ray-tracing procedure [10].…”

Section: Introductionmentioning

confidence: 99%

Optical analysis of a curved-slats fixed-mirror solar concentrator by a forward ray-tracing procedure

Pujol-Nadal

Martínez-Moll

2013

Appl. Opt.

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Fixed-mirror solar concentrators (FMSCs) use a static reflector and a moving receiver. They are easily installable on building roofs. However, for high-concentration factors, several flat mirrors would be needed. If curved mirrors are used instead, high-concentration levels can be achieved, and such a solar concentrator is called a curved-slats fixed-mirror solar concentrator (CSFMSC), on which little information is available. Herein, a methodology is proposed to characterize the CSFMSC using 3D ray-tracing tools. The CSFMSC shows better optical characteristics than the FMSC, as it needs fewer reflector segments for achieving the same concentration and optical efficiency.

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“…~~~~--~~~~--~4~00~~44~0--~~--~--~--~6~00----64~0~°FFLUID OUTPUT TEMPERATUREComparison of Collector Efficiency Versus OutputTemperature for Line-Focus Solar ConcentratorsFigures 22,23,24 show typical line-focus collector types (parabolic trough, fixed mirror/tracking focus and fixed focus/tracking mirror, respectively). The parabolic trough concentrator has been used in a number of SIPH demonstration projects.Figure 25shows a comparison of thermal efficiencies of the parabolic dish, the line-focus and the evacuated tube collectors (from Ref 25)…”

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confidence: 99%

Solar Industrial Process Heat

2020

Solar Engineering of Thermal Processes, Photovoltaics and Wind

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The purpose of the assessment of the involved in energy others interested future. Solar Technology Assessment Project is to present an state of solar energy technology for individuals research, industry, legislation and policy, and to in a better understanding of the nation's energy This project was organized and ~oordinated by the Florida Solar Energy Center under •sponsorship of the Office of Policy, Planning and

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Summary report: concentrating solar collector test results, Collector Module Test Facility

Cited by 12 publications

References 0 publications

Incidence-Angle Modifier and Average Optical Efficiency of Parabolic Trough Collectors

Incidence-Angle Modifier and Average Optical Efficiency of Parabolic Trough Collectors

Optical analysis of a curved-slats fixed-mirror solar concentrator by a forward ray-tracing procedure

Solar Industrial Process Heat

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