Yeda Research and Develpment & Co. Ltd

Ormat Turbines, Ltd.

Inksure Rf Inc.

The Weizmann Institute of Science

Ormat Turbines (1965) Ltd.

Ormat Systems Ltd

Yeda Research and Development Co., Ltd., Israeli Company of the Weizmann

Amnon Yogev

Vladimir Krupkin

Michael Epstein

David Mahlab

Shlomo Dukler

Jacob Karni

Harald Ries

Dan Yakir

Jakob Ehrensberger

Akiba Segal

Chengcai Yao

A radio frequency (RF) data carrier is presented. The RF data carrier comprises at least one diffraction element that has a dimension of the order of a wavelength of RF radiation and is responsive to RF irradiation, the response produced by the diffraction elements in the data carrier being indicative of machine-readable data carried by data carrier.

Radio frequency data carrier and method and system for reading data stored in the data carrier

A radio frequency (RF) data carrier and method and system for reading information stored in the data carrier are presented. The data carrier comprises a collection of circuitries defining together a predetermined information code. Each circuitry includes: (a) a code circuit configured to have a certain RF frequency response to a powering signal and thus defining a certain symbol of the predetermined information code, and (b) a delay circuit configured to provide a phase delay of a predetermined value to said powering signal associated with the respective code circuit to thereby define a location of this symbol in the information code. The data carrier further comprises a power unit operable to produce said powering signal to actuate the delay circuit. The power unit comprises at least one inductance coil responsive to alternation of an external magnetic field for generating said powering signal as an electromotive force voltage as a result of intersecting windings of the coil with magnetic flux lines of the external magnetic field.

Radio frequency data carrier and system for reading data stored therein

A solar energy system comprises a solar absorber in the form of a solar boiler tank with a lower working liquid region having a liquid inlet and filled with a working liquid capable of boiling under a predetermined pressure, and an upper vapor accumulation region having a vapor outlet for withdrawing from the tank a vapor created in the tank. The system further comprises vapor utilization means associated with the vapor outlet. The solar boiler tank has at least one transparent window to receive and pass towards the working liquid highly concentrated solar radiation. The system also comprises means for controlling the pressure of vapor in the vapor accumulation region to make the working liquid boil at the predetermined pressure.

Solar energy system with direct absorption of solar radiation

A solar radiation concentrating system ( ) comprises at least two reflectors ( ) successively arranged along an optical path ( ) of the system ( ) so that a first ( ) of the two reflectors ( ) reflects the radiation towards a second ( ) of the two reflectors ( ). The reflectors ( ) have such spectral characteristics as to be capable of highly reflecting the radiation in a reflection range of wavelengths and absorbing the radiation in an absorption range of wavelengths, wherein the absorption range of wavelengths of the first reflector ( ) substantially includes the absorption range of wavelengths of the second reflector ( ).

Solar energy plant

A transparent radiation delivery waveguide and a guided radiation receiver assembly using the same, which assembly comprises a first transparent medium with a first refractive index n,, a receiver chamber having an aperture and holding a second transparent medium having a second refractive index n,, and the transparent radiation delivery waveguide having a third refractive index n,substantially equal or greater than n,. The radiation delivery waveguide n,consists of a transparent vessel holding a transparent liquid medium and has a first radiation intake portion in optical contact with the first transparent medium and held tightly within the aperture of the receiver chamber, and a second, tapered radiation delivery portion of non-circular cross-sectional shape, projecting into the receiver chamber.

Guided radiation receiver assembly and a radiation delivery waveguide for use therewith

Photovoltaic cell system and an optical structure therefor

Production of metallic sodium and potassium by reaction of their hydroxides or carbonates with carbon. The carbon may be produced in situ by pyrolysis of a pyrolyzable carbonaceous material. There are further disclosed a process and installation for performing the production while using solar energy.

Carbothermal production of alkali metals

Bioreactor and system for improved productivity of photosynthetic algae

Solar process for the production of volatile elemental zinc, sodium, and potassium by reacting their oxides with a reducing metallic agent selected from Fe, Sn, Ni, Co and Mn, and in a second step, reacting carbon or hydrogen with the oxide of said reducing metallic agent so as to reduce it back to its metallic form.

Production of elementary volatile metals by thermal reduction of their

Control of a heliostat field in a solar energy plant

Delivery of radiation from a first transparent medium to a second

A two layer system for heat energy capture and storage with an upper or lower layer for heat extracting and the other layer for heat transfer. Either layer can function as a phase change material. Heat stored is conducted externally of the system and can be used directly in a converting system, i.e., heat to mechanical or electrical energy or transferred as heat for further applications.

Heat storage device

A laser apparatus of the end pumping kind in which an elongated transparent laser element is mounted in spaced relationship within a tubular waveguide which has a highly reflective inner surface. The arrangement is such that, at least along part of the laser element, the optical distances between different points on the surface of the laser element and the inner contour of the waveguide vary.

Optically pumped laser apparatus

The disclosure concerns various improvements in a solar energy plant of the kind in which incoming solar radiation is concentrated by a Fresnel reflector, i.e. a field of concentrating mirrors, and the concentrated radiation is focused into a solar receiver. By one improvement a dielectric mirror is provided at a suitable level above the solar collector, to reflect the concentrated solar radiation into the collector. By another disclosed improvement a plurality of non-imaging secondary concentrators arranged in concentric zones is provided intermediary between the dielectric mirror and receiver. By yet another improvement the solar receiver is directly attached to a heat storage system.

Modifications are made to the standard process for the manufacture of ammonia and related compounds, resulting in lower operating costs through reduced total energy consumption. In one aspect of the invention, this is achieved by directing ammonia gas through one feed line, and carbon dioxide gas and steam through another feed line, into a closed reaction chamber to form ammonium carbonate. The formation of this solid compound results in a reduced pressure in the chamber. This reduced pressure can be used to drive heat engines in the reactant feed lines. In another aspect of the invention, the cost of running the potassium carbonate loop while the rest of the system is down is reduced by constructing an alternate pathway along part of the loop. The carbon dioxide gas and water vapor formed by the heating of the potassium bicarbonate flow through a heat engine and are cooled. The cooled water vapor and carbon dioxide gas are then recycled. The reactant gases may be liquified and revaporized in the event of reactor shutdown, and heat-exchange means may be associated with the system to provide at least a portion of the heat of vaporization of the liquified reactants. The heat-exchange means can thus produce a refrigerating fluid as a result of the vaporization of the reactants.

Growing community of inventors

Rehovot, Israel

Amnon Yogev