Optical design of a Fresnel concentrating solar system for direct transmission of radiation through an optical fibre bundle

Rahou, M.; Mojiri, Ahmad; Rosengarten, Gary; Andrews, John

doi:10.1016/j.solener.2015.11.019

Cited by 21 publications

(7 citation statements)

References 18 publications

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“…This experiment confirmed the probability of daylighting system with a corresponding mechanism and achieved efficacy of 250 lum/W which was twice that of natural light as it could efficiently filter out the infrared light [26]. M. Rahou et. al., (2016) In this paper the authors analyzed the feasibility of proficiently conveying the concentrated solar energy to a load capacity which was has been a difficult task to achieve in solar thermal applications with high temperature.…”

Section: Literature Reviewsupporting

confidence: 68%

“…From the simulation results it was estimated that about two third of the losses occurring at the entrance end of the optical fiber bundle are due to its padding material around the discrete fiber. The average transmission per meter length through the fiber bundle consisting of 15 mm diameter and 27,000 low OH fiber was around 52% with a fresnel lens [27].…”

Section: Literature Reviewmentioning

confidence: 99%

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Development of Solar Concentrator studded with Optical Fiber for Daylighting

Sharma¹,

Narwade²,

Nagarajan³

et al. 2021

IJSRP

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Over the years there has been an increase in the energy consumption pattern which has given rise to various environmental issues. Around 20% of the energy is used for lighting purpose and conferring to a U.S. Energy Information Administration 2007 & International Energy Agencies 2006 report lighting amounts for 7% of the CO 2 emissions globally and releases around 1900 metric tons of carbon dioxide (CO 2 ) into the atmosphere. Due to this issue an environment friendly solution which utilizes renewable form of energy so that even actions like lighting the buildings could be sustainable. About 50-80% of energy consumption for lighting can be saved through designing an efficient daylighting system to light the interior spaces in the buildings, which would provide various physiological and psychological benefits for the wellbeing of human beings. In this study a daylighting system is designed on the Cassegrain principle and evaluated through software's and experimental setup. A model of the daylighting system is constructed using simple and low cost materials, easily available and reliable. Maximum solar radiation point was ascertained by studying sun path diagrams. The model was tested for its lux intensity and temperature on 5 sunny days over a period of 6 hours. The daylighting system provides a lux intensity of above 1400 at its peak hour and 323 lux at its minimum through a bundle of 209 individual optical fibers enclosed in a circular pipe of 3/4 inch in diameter. The temperature attained was 60 ºC and 50 ºC which were well within the operating temperature limits of the optical fiber.

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Section: Literature Reviewsupporting

confidence: 68%

Section: Literature Reviewmentioning

confidence: 99%

Development of Solar Concentrator studded with Optical Fiber for Daylighting

Sharma¹,

Narwade²,

Nagarajan³

et al. 2021

IJSRP

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“…x=b (19) where q ′′ c is the rate (per unit time) at which heat is conducted in the x-direction at a point x = b, i.e., at the collector. Then, Eqs.…”

Section: A Statement Of Conceptmentioning

confidence: 99%

On the use of thermal conductive focusing for solar concentration enhancement

Arias

2016

International Journal of Thermal Sciences

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© 2016. This version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/We discuss the possibility for solar concentration enhancement via conductive heat transport. Here, we are concerned, as in orthodox approaches, about maximizing the solar concentration to obtain the highest receiver temperature possible, but with one important difference: In the proposed approach, the solar concentration enhancement is attained not by the use of lenses, mirrors, or funnels (i.e., by optical concentration based on radiative transport), but via thermal conduction, what we call thermal conductive focusing. Among the additional advantages of thermal conductive focusing is the capability to concentrate indistinct direct incidence as well as diffusive radiation. Thus, the concept is especially insensitive to cloudy days and particularly attractive in application to environments with important diffusive components of light. Utilizing a simplified geometrical model, an analytical expression for the temperature and concentration gain at the receiver was derived. The particular application for a parabolic solar trough was analysed. Additional research and development is required to explore the possibilities of solar flux enhancement by thermal conductive focusing as well as the optimization of several variables.Peer ReviewedPostprint (author's final draft

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“…Concentrated solar power technologies are extensively studied in the literature for various concentrators, i.e. parabolic dish [17], linear Fresnel reflectors [18,19], central tower [20,21] and parabolic trough [22,23], for various power generation cycles, i.e. pressurized air cycles [24], molten salt cycles [25] and direct steam cycles [26,27], and for various operating regimes [28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of efficient solar thermal power cycles for baseload power supply

Gençer

2017

Energy Conversion and Management

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Limited fossil fuel reserves and increasing greenhouse gas emissions from fossil fuels make it essential to develop alternative renewable energy conversion processes to meet energy needs. Advancements in renewable power production are especially important since electric power is the largest consumer of primary energy resources with the highest growth rate among alternate energy use sectors, and is currently responsible for greater than 40% of the global CO 2 emissions. Among the renewable energy sources, solar energy is prominent due to its abundance. Here, we introduce an efficient solar thermal power cycle, solar water power (SWP) cycle, with water as the working fluid, which undergoes reheats between expansions. SWP cycle is developed to maximize exergy efficiency, allow flexible operation and process intensification. Simulation and optimization of the SWP cycles are performed in an integrated Aspen Plus/MATLAB modeling environment. Modeling results predict that SWP cycle with 1 solar reheating stage has a potential to generate electricity with sun-to-electricity efficiencies greater than 30% at solar heat collection temperature as low as 750 K. The cycle also promises sun-to-electricity efficiencies in the unprecedented range of 40 to 46% for the corresponding temperatures above 1400K. Further efficiency increase is estimated by the addition of more reheating stages.

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Optical design of a Fresnel concentrating solar system for direct transmission of radiation through an optical fibre bundle

Cited by 21 publications

References 18 publications

Development of Solar Concentrator studded with Optical Fiber for Daylighting

Development of Solar Concentrator studded with Optical Fiber for Daylighting

On the use of thermal conductive focusing for solar concentration enhancement

Synthesis of efficient solar thermal power cycles for baseload power supply

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