Journal ArticleDOI
Optical analysis of a hemispheric concentrator with a manual tracking system for the declination
TLDR
In this article, a fixed hemispheric concentrator with a crescent receiver is presented, where the position of the receiver is adjusted every three days taking into account the declination.Abstract:
We present in this paper, a craft prototype of a fixed hemispheric concentrator, built from small square mirrors with a moon crescent receiver. The position of the receiver is adjusted every three days taking into account the declination. This system achieves a geometric mean concentration of 122 and the experimental measurements lead to temperatures varying between 120°C and 260°C in the plan for the least diffusion. The proposed improvements should allow for more competitiveness and convenience than the Scheffler system with its electromechanical sun tracking. KEYWORDS : hemispheric concentrator, Fixed Mirror Distributed Focus – FMDF, Solar bowl, Scheffler,read more
Citations
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Journal ArticleDOI
Optical and Thermal Performance Analysis of a Steady Spherical Collector with a Crescent-shaped Rotating Absorber
Thierry Sikoudouin Maurice Ky,Boureima Dianda,Moktar Ousmane,Magloire Pakouzou,Sié Kam,Dieudonne Joseph Bathiebo +5 more
TL;DR: In this paper, an optical analysis of spherical concentrator is made to determine the local and the global geometric concentration, as knowing the geometric concentration of a system can help predict what temperatures can possibly be obtained with it.
Journal ArticleDOI
Theoretical Optical Analysis of a Spherical or a Plat Diopter on a Hemispherical Concentrator
TL;DR: In this paper, a hemispherical concentrator with a flat diopter on its upper side is compared with the Rawlemon spherical concentrator, and a comparison of the local, global geometric and geometric mean concentrations curves of all these systems is made.
Journal ArticleDOI
Experimental Study of a Stationary Hot Air Solar Collector Built with Hemispherical Concentrators and Enhanced with Fresnel Lenses
Thierry Sikoudouin Maurice Ky,Salifou Ouedraogo,Moctar Ousmane,Boureima Dianda,Emmanuel Ouedraogo,Dieudonné Joseph Bathiebo +5 more
TL;DR: In this article, a solar collector made of hemispherical concentrators with Fresnel lenses axially-centered to those concentrators and placed on top of each one of them was used for natural convection.
References
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Journal ArticleDOI
Design principle and calculations of a Scheffler fixed focus concentrator for medium temperature applications
TL;DR: In this paper, the authors present a complete description of the design principle and construction details of an 8m2 surface area Scheffler concentrator with respect to equinox (solar declination) by selecting a specific lateral part of a paraboloid.
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Effect of micro-level and macro-level factors on adoption potential of solar concentrators for medium temperature thermal applications
TL;DR: In this article, a model is developed for estimation of market acceptance of a solar concentrator based on economics, illustrated for two commercially offered solar concentrators in India, namely, fixed focus 16m2 Scheffler concentrator and moving focus 160m2 ARUN concentrator with Fresnel arrangement of reflectors.
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Study of two types of cylindrical absorber of a spherical concentrator
TL;DR: In this paper, the main purpose of this work is the study of types of cylindrical canister with a spherical hub and our have two types of receptor, one closed and the other coil is a cylinear inside a receiver, we are particularly attached to the determination of operating characteristics, the temperature of the absorber, the various power and efficiency.
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Concentrating sunlight with an immobile primary mirror and immobile receiver: Ray-tracing results
TL;DR: In this article, a combination of custom computer code and commercially available ray-tracing software is used to explore variations of concentrator geometries where sunlight is first incident onto a stationary primary mirror of circular cross section.