Truncation of CPC solar collectors and its effect on energy collection

Carvalho, María Miguel; Collares-Pereira, Manuel; Gordon, Jeffrey M.; Rabl, Ari

doi:10.1016/0038-092x(85)90127-6

Cited by 103 publications

(26 citation statements)

References 7 publications

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“…1985, [33]; Rabl, 1976, [20]. The effects of truncation on the energy collection capability of the CPC with a tubular absorber have been studied extensively [33]. The reported type of modification in the angular acceptance function are shown in Figure 5.…”

Section: Does T H E Cpc Out-perform All Othermentioning

confidence: 99%

Symmetric and asymmetric linear compound parabolic concentrating solar energy collectors: The state-of-the-art in optical and thermo-physical analysis

Norton

Eames

Yadav

1991

International Journal of Ambient Energy

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Section: Does T H E Cpc Out-perform All Othermentioning

confidence: 99%

Symmetric and asymmetric linear compound parabolic concentrating solar energy collectors: The state-of-the-art in optical and thermo-physical analysis

Norton

Eames

Yadav

1991

International Journal of Ambient Energy

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Section: Annual Collectible Radiation On All-glass Evacuated Solar Tumentioning

confidence: 99%

“…In practical applications, CPCs are usually truncated due to the lesser contribution of the upper portion of reflectors to radiation collection [24], therefore, among the six CPCs investigated in this work, CPC-4 is the optimal design for concentrating solar radiation on the EST and CPC-1 is the most inferior solution in terms of annual collectible radiation. In practical applications, CPCs are usually truncated due to the lesser contribution of the upper portion of reflectors to radiation collection [24], therefore, among the six CPCs investigated in this work, CPC-4 is the optimal design for concentrating solar radiation on the EST and CPC-1 is the most inferior solution in terms of annual collectible radiation. …”

Section: Annual Collectible Radiation On All-glass Evacuated Solar Tumentioning

confidence: 99%

Design and Optical Performance of Compound Parabolic Solar Concentrators with Evacuated Tube as Receivers

Wang

Tang

2016

Energies

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Abstract:In the present article, six symmetric compound parabolic solar concentrators (CPCs) with all-glass evacuated solar tubes (EST) as the receiver are designed, and a comparative study on their optical performance is performed based on theoretical analysis and ray-tracing simulations. In terms of optical loss through gaps of CPCs and optical efficiency averaged for radiation over the acceptance angle, CPC-6, designed based on a fictitious "hat"-shaped absorber with a "V" groove at the bottom, is the optimal design, and CPC-1, designed based on the cover tube, is the worst solution, whereas from the point of view of the annual collectible radiation on the EST, it is found that CPC-4, designed based on a fictitious "ice-cream" absorber, is the optimal design and CPC-1 is the worst solution. CPC-6, commonly regarded as the best design in the past, is not an optimal design in terms of annual collectible radiation after truncation. Results also indicate that, for high temperature applications, CPC-6 and CPC-4 are advisable due to the high solar flux on the EST resulting from the high optical efficiency for radiation within the acceptance angle.

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“…This new design studied by [20] is integrated collector storage solar water heater (ICSSWH) with parabolic trough that is compare with the regular flat plate thermo-syphon unit. The important factor to be consider in ICSSWH is its depth, if the depth is more performance is low, therefore the depth of solar thermal devices that combine with Compound Parabolic Concentrating (CPC) reflector [18,[21][22][23]. The parabola trough gives the momentous improve in the thermal performance.…”

Section: ) Integrated Collector-storage Solar Water Heater (Icsswh) mentioning

confidence: 99%

A Review on Revolution of Flat Plate Collector for Solar Water Heater

Patil¹

2018

IJRASET

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Energy is the significant need of the world either for nutrition or for development of the society. The power bank of the earth is the sun, which has tremendous amount of energy in it and will never exhaust. The conversion of solar energy to thermal energy is the function of collector. Flat plate collector (FPC) are cost effective and more convenience in all collectors. The paper reveals the different design of the flat collectors used to enhance the efficiency of the collector. Effect of using phase change material, nanofluids, heat pipe, different geometry of the tubes and absorber discussed. This review deals with the suggestion for the research work in flat plate collector. Keywords: FPC Design; Solar Collectors; different collectors for SWH; Design of SWH I. INTRODUCTIONEnergy is the most important and a key factor in day-to-day life. The keen interest is towards the solar energy which is a pure green energy and available in plenty. The energy of Sun used to heat the water, which is the great need of each human being for various purposes. During review it is found that the various solar water heating system were made by many researchers with relatively high efficiency and reasonable cost, but the system does not meet the requirement of other countries due to climatic conditions and many other reasons. Today environment is the major issue and the awareness regarding the environment is increasing this promote solar and renewable energy system in world and decreases the dependencies' on fossil fuels. The solar water heating system consist of riser tubes, absorbers a dark surface plate, insulation and glazed glass. The system when exposed to the sun, the absorber absorbs the solar radiation and transfers a part of it to the fluid flowing over/under it [3][4][5][6][7]. The more is the collector area more will be the energy, but the law of thermodynamics state that no machine can gives 100% output therefore we even cannot get the 100% percent conversion. Now, the design goals were to have the collector that can convert the maximum solar energy to heat energy with a lesser amount of losses; and cost. The objective for the review of solar water heating system is to get the various designs available and invented by researchers at one place to get the idea of possible development in it with the future of design in Solar Water Heater (SWH). The review is limited to the flat plate collector and other similar to it. There are two broad categories of SWH (passive and active), each of them operating in either direct or indirect mode. The active systems give 35%-80% efficiency higher than those of the passive systems [3].

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Truncation of CPC solar collectors and its effect on energy collection

Cited by 103 publications

References 7 publications

Symmetric and asymmetric linear compound parabolic concentrating solar energy collectors: The state-of-the-art in optical and thermo-physical analysis

Symmetric and asymmetric linear compound parabolic concentrating solar energy collectors: The state-of-the-art in optical and thermo-physical analysis

Design and Optical Performance of Compound Parabolic Solar Concentrators with Evacuated Tube as Receivers

A Review on Revolution of Flat Plate Collector for Solar Water Heater

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