... probability density function. 11 10 2010 01 03 2011 13 10 2011 13 10 2011 Gaussian distribution light reflection mirrors Monte Carlo methods optical design techniques optical dispersion ray tracing dispersion error Monte Carlo ray-tracing Rayleigh distribution...

.... Measuring slope deviations in the parabolic shape of the mirror panels in the accuracy and resolution required for these applications is a challenge as it is not required with the same characteristics in other industries. Photogrammetry and deflectometry are the two optical measurement methods...

... of a combination of mirror elements and a linear receiver with a fixed arrangement for a given collector model. In order to build large solar fields, the fixed trough design is duplicated numerous times. Typically, no modifications are made for the single trough element for a particular site, but the same design...

...Serhan M. Ardanuç; Amit Lal; Samuel C. Jones This paper presents a modular and scalable approach to concentrated solar power (CSP) harvesting by using low-profile, light-weight, sun-tracking, millimeter-to-centimeter-scale mirror arrays that can be wirelessly controlled to reflect the incident...

...Lifang Li; Andres Kecskemethy; A. F. M. Arif; Steven Dubowsky Parabolic concentrator mirrors are an important component of many solar energy systems, particularly solar mirror collectors. Precision parabolic mirrors are expensive to fabricate and to transport. Here, a new concept for designing...

... the analytical solution and investigate the effect of sun shape and mirror surface imperfections on the radiation uniformity and spillage. This design is pertinent to concentrating photovoltaics at moderate mean solar flux concentration ratios of up to 50 suns. Feuermann , D. , and Gordon , J. M...

... is dominated by mirrors brought into position by steel structures and drives that guarantee high accuracies under wind loads and thermal stress situations. A large fraction of costs is caused by the stiffness requirements of the steel structure, typically resulting in ∼ 20 kg / m 2 steel per mirror area...

... solids are involved or heavy equipment has to be placed on top of a conventional tower. The theory of this optics has been thoroughly studied and reported elsewhere. This paper details the development and experience gained with the mirror facets of the tower reflector. Thermal and stress analyses...

...R. Bader; P. Haueter; A. Pedretti; A. Steinfeld An innovative concept for fabricating solar trough concentrators based on pneumatic polymer mirrors supported on precast concrete frames is presented. Optical aberration is corrected by means of a secondary specular reflector in tandem with a primary...

...R. Buck; E. Teufel Heliostat canting (alignment of mirror facets) is known to have a major influence on the optical efficiency of heliostat fields and therefore on the power output of solar tower plants. In recent years several canting concepts were used, mainly on- and off-axis canting. Several...

...L. Amsbeck; R. Buck; A. Pfahl; R. Uhlig In standard heliostat design, the usual strategy of cost reduction is to increase the mirror area of the heliostats. This not only leads to a reduction of specific drive cost but also to an increase of the torques caused by the wind loads, resulting in higher...

... that is chemically compatible with liquid fluoride salts at high temperatures. About half the cost of a solar power tower is associated with the mirrors that focus light on the receiver, and less than one-third is associated with the power cycle and heat storage. Consequently, increasing the efficiency by 20–30% has...

...Richard B. Diver; Timothy A. Moss In this paper a new technique for parabolic trough mirror alignment based on the use of an innovative theoretical overlay photographic (TOP) approach is described. The technique is a variation on methods used to align mirrors on parabolic dish systems. It involves...

...C. E. Kennedy; K. Terwilliger Concentrating solar power (CSP) technologies use large mirrors to collect sunlight to convert thermal energy to electricity. The viability of CSP systems requires the development of advanced reflector materials that are low in cost and maintain high specular...

...S. Biryukov PETAL (Parabolic Energy Transformation and Astrophysics Laboratory) is a large multipurpose dish-shaped concentrator, located at Sede Boqer. Its 2-axis tracking paraboloidal surface, with aperture area in excess of 400 m 2 , is constructed from 216 adjustable mirror panels. The very...

... the work performed here is to match the two systems together for optimal performance. It is shown that a hollow, rectangular-shaped non-imaging (NI) device only 23 cm long can effectively distribute the IR flux incident on the TPV array mounted behind the secondary mirror. Results of the ray-tracing...

.... This unique facility serves principally as an experimental platform for investigating thermal and thermochemical processes at temperatures up to 3000°K. The light source is close-coupled to precision optical reflectors to produce an intense beam of concentrated radiant energy. The focusing mirrors...

...Mithra Sankrithi A proof-of-concept subscale prototype of a lightweight, low-cost inflatable heliostat features a spherical inflatable structure with a reflective Mylar membrane mirror on its equatorial plane. The reflective surface is protected from rain, dust, sand, and wind...

... solar energy concentrators mirrors In order to popularize the evacuated tubular collectors, we must decrease the price and weight per collector area as well as increase the collector efficiency. The evacuated double glass tube (EDGT) for ETC is composed of a cylindrical absorber tube...

..., and other researchers: 1) It allows the use of parabolic mirrors, which have a reflecting area much smaller for a given concentration ratio and acceptance angle. 2) Between the mirror and the absorber, there is a large gap so that conduction losses are reduced. Convection losses can be reduced, too...