A comparison of compound parabolic and simple parabolic concentrating solar collectors

Grimmer, D. P.

doi:10.1016/0038-092x(79)90055-0

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…Compound parabolic concentrator is constructed like two meeting parabolic reflectors having application where temperature demand is over 100 °C [76]. These can collect nondirect radiation using less amount of material in the manufacturing of reflector, and reflectance is increased two-third times [77]. CPC can collect radiation received with large angular spread and then concentrate it on to linear receivers of lesser transverse width.…”

Section: Comparison Of Solar Collectormentioning

confidence: 99%

A Comparative Thermal Performance Assessment of Various Solar Collectors for Domestic Water Heating

Kalair

Seyedmahmoudian

Saleem

et al. 2022

International Journal of Photoenergy

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Growing population, depleting fossil fuels, economic expansions, and energy intensive life style demand are resulting in higher energy prices. We use energy as of heat and electricity, which can directly be obtained from sun using thermal collectors and solar cells. Solar thermal systems are gaining attention for water and space heating applications due to green aspects of solar energy. A solar thermal collector is a vital part of solar thermal energy system to absorb radiant energy from the sun. In this study, a solar water heating (SWH) system has been designed and simulated in the TRNSYS ® software using thermal and chemical properties of heat transfer fluids using REFPROP for dwellings located on ±31° latitudes (+31 Lahore in Pakistan and -31° Perth in Australia). We present an efficiency parametric optimization-based model for water and space heating. Simulation results for four types of solar thermal collectors are presented, and performance is analyzed on the basis of output temperature ( T out ), solar fraction ( f ), and collector efficiency ( η ). This study evaluates the comparative performance of evacuated tube collector (ETC), flat-plate collector (FPC), compound parabolic concentrator (CPC), and thermosiphon-driven systems. Our findings conclude the evacuated glass tube collector achieves the highest solar fraction, i.e., 50% of demand coverage during August in Pakistan and February in Australia, with an overall average of 43% annually.

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Section: Comparison Of Solar Collectormentioning

confidence: 99%

A Comparative Thermal Performance Assessment of Various Solar Collectors for Domestic Water Heating

Kalair

Seyedmahmoudian

Saleem

et al. 2022

International Journal of Photoenergy

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“…In Tables 2-4, the design values are determined using Eqs. ( 1), ( 3), ( 4), ( 14), ( 7), (10), (11), and (13) for focal length f , radius r E , height h, number of mirrors n M , angle ξ F j , number n Θ j , angle θ F j , and coordinates r F jk and z F jk , respectively.…”

Section: Single Elliptical Mirror and Multi-part Mirrorsmentioning

confidence: 99%

Performance Evaluation of Elliptical and Multi-part Mirrors for Concentrating Diffused Light onto Collector Surface from Half Celestial Sphere

Mitsuhiro

2021

JIIAE

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“…PTRs have been used to successfully degrade various water contaminants, including pesticides, metal complexes, and bacteria, ,,,,− and a significant number of the examples of pilot-scale demonstrations of photocatalytic technology have been based upon their use. These examples are largely from the earliest investigations into the use of photocatalysis for wastewater treatment, which used PTRs due to their familiarity and availability.…”

Section: Parabolic Trough Reactorsmentioning

confidence: 99%

“…No thorough investigations into the applicability of PTRs to these processes have yet been conducted to test this claim. While PTRs can be designed to collect some diffuse light by enlarging the absorber tube, 53 this eliminates one of their advantages, i.e. the use of small diameter absorber tubes.…”

Section: Parabolic Trough Reactorsmentioning

confidence: 99%

Review of Major Design and Scale-up Considerations for Solar Photocatalytic Reactors

Braham

Harris

2009

Ind. Eng. Chem. Res.

218

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Photocatalytic processes are applicable in wastewater treatment, energy production, chemical synthesis, and greenhouse gas mitigation and thus have the potential to address both the consumption of nonrenewable fossil fuels and global warming, two of the greatest problems facing humankind. The ability to achieve these outcomes using only solar energy as an input is particularly attractive. However, the implementation of most photocatalytic processes at an effective scale requires the use of a photoreactor, a device which brings photons, a photocatalyst and reactants into contact, as well as collecting the reaction products. In this work, we review the state-of-the-art in solar photoreactor design and assess those systems which are most applicable for industrialscale implementation. Designs for parabolic trough, compound parabolic, inclined plate, double skin sheet, rotating disk, water bell, fiber optic, and fixed/fluidized bed photoreactors are qualitatively discussed and compared. Compound parabolic photoreactors are most suited to near term applications at pilot-scale (>1000 L/day) due to their advantageous light collecting properties and well-known design methodology. Double-skin sheet photoreactors are also suited to near term applications; however, significantly less is known about their design and performance discrepancies between studies in the literature have been reported. Compared to other photoreactor designs, the significantly simplified design and low material cost of inclined plate photoreactors makes them particularly suitable for use in economically and logistically challenged areas where the volumes to be treated are small (<100 L/day). Fluidized bed photoreactors are highly efficient, but more research is needed into their design and operation for effective use with solar radiation. The other photoreactor designs reviewed are unlikely to see wide use due to, variously, high mechanical complexity, poor efficiency, and/or susceptibility to environmental conditions but may find limited use in specialized applications, e.g. in instances where it is advantageous to separate the light gathering and photocatalytic components of the photoreactor.

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A comparison of compound parabolic and simple parabolic concentrating solar collectors

Cited by 10 publications

References 3 publications

A Comparative Thermal Performance Assessment of Various Solar Collectors for Domestic Water Heating

A Comparative Thermal Performance Assessment of Various Solar Collectors for Domestic Water Heating

Performance Evaluation of Elliptical and Multi-part Mirrors for Concentrating Diffused Light onto Collector Surface from Half Celestial Sphere

Review of Major Design and Scale-up Considerations for Solar Photocatalytic Reactors

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