Optical: systems and elements – Lens – Fluid
Patent
1998-03-30
2000-09-26
Dang, Hung Xuan
Optical: systems and elements
Lens
Fluid
359698, 359699, 359700, G02B 106, G02B 1514
Patent
active
061249807
DESCRIPTION:
BRIEF SUMMARY
OBJECT OF THE INVENTION
This descriptive report refers to a condenser of solar energy which incorporates a large size modular liquid lens, using the property possessed by fluids of refracting and concentrating light when they are delimited by curved transparent surfaces, i.e., this is a lens conformed by different transparent lenticular recipients of shapes, dimensions and curvatures which permit, in their combination, the configuration of a modular liquid lens with a focal distance which is appropriate and capacitated to be placed on a moving or fixed structure, with this structure adjusted to the characteristics of the modular liquid lens thus constituted, permitting its construction in large dimensions, without limitation of thicknesses and shapes, having at the same time the quality of being manufactured at low cost in comparison with other known lenses of similar optical characteristics, developed with other materials and providing the concentration of the solar flux corresponding to large surface areas.
It is also the object of the invention to permit the condensation of solar rays of a certain surface area on a heat absorber, and to provide sufficient energy to the fluid which circulates through the secondary circuit thereof, in order to raise its temperature beyond its boiling point with the object of permitting its use as thermal fluid in an electricity production turbine, in a water desalinization plant or in any other application which requires steam of high enthalpy.
The invention possesses a condensation system based on modular liquid lenses which considerably cheapens the cost of its installation compared with conventional lenses, also being provided with a tracking and guidance system which permits the total harnessing of the impinging rays, which always act in the most efficient form in the heat exchanger.
FIELD OF THE INVENTION
This invention has its field of application within the industry dedicated to the harnessing of solar energy by its concentration, both in the manufacturing of lenses, as elements and devices for that purpose, and within the optics industry and, in general, in all applications in which lenses of large dimensions are required, it being equally possible to use it in the industry dedicated to the manufacturing of condensers of solar energy.
BACKGROUND TO THE INVENTION
It is known that by means of the use of a transparent lenticular recipient with a refracting liquid in its interior, similar effects of concentration of solar light are achieved to those obtained with a conventional optical lens, but to date this physical principle has only been approached on a small scale, which is not viable for industrial usage due to its very high cost.
Since the objective of this invention is the harnessing of large magnitudes of solar flux, in order to obtain high temperatures and a great concentration of energy, it is necessary to use lenses of large dimensions, of an appropriate design, which optically, and with a low manufacturing cost, permit an economically viable use for industrial purposes, such as the obtainment of electrical energy, desalinization, depuration, treatment of wastes, applications in the field of medicine, optics in general, production of hydrogen, cogeneration of energy, etc.
The applicant also knows of the existence of patents which develop some of the elements which are used in condensers of solar energy on a moving structure, among which the following may be pointed out.
Spanish Patent No. 9101791, of Jul. 30, 1991, which sets forth the idea of being able to concentrate the solar flux by means of lenses which have the particularity of being configured as lenticular recipients of transparent material which, when filled with a transparent fluid, semi-solid material or solidifiable material, refract the direct or previously reflected light in a way which is similar to that achieved with an ordinary lens, with the consequent cheapening of costs, integrating these ideas in a body which is materialized in the so-called "liquid lens".
Spanish Patent No. 9402
REFERENCES:
patent: 4167937 (1979-09-01), Bergkvist
patent: 4249516 (1981-02-01), Stark
Dang Hung Xuan
Lucas Michael
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