Brightsource Industries (israel), Ltd.

Solargik Ltd

Gil Kroyzer

Israel Kroizer

Yoel Gilon

Rotem Hayut

Efrat Zocher Arica

Gideon Goldwine

Arnold J Goldman

Ophir Chernin

Eyal Rosenwein

Dan Franck

Ziv Aumann

Morag Am Shallem

Hadas Weisz

Boaz Grosman

Bryon Roos Gomberg

Morag Am-Shallem

Yehoshua Grantz

In a solar energy system, a photovoltaic (PV) assembly includes a frame subassembly and an array of PV panels joined to and pivotable with the frame assembly. A support pylon comprises a hollow member open on a first side. A drive system includes an electric motor and a pivot-wheel assembly comprising a drive chain joined to a hoop portion. The pivot-wheel assembly is arranged to transfer a torque from the electric motor to the frame subassembly. The electric motor is at least partly disposed within the hollow member and is mounted to a wall of the hollow member. A gearing arrangement includes a drive shaft passing through an aperture in the wall so as to place the motor in geared communication with the drive chain via a sprocketed drive wheel.

Drive system for photovoltaic trackers

Various implementations described herein are directed to an apparatus including an assembly for supporting a plurality of photovoltaic panels above a ground. The assembly may be supported by one or more poles. Each of the plurality of poles may include a fixed portion configured to be fixed on the ground and a moveable portion configured to be moveably coupled to at least one of the fixed portion or the assembly. The moveable portion may have a closed configuration. At the closed configuration, the moveable portion may support the assembly by being coupled to the fixed portion, and an open configuration. At the open configuration, the moveable portion may be detached from at least one of the fixed portion and the assembly.

Adjustable supporting structure for one or more photovoltaic panels

A solar energy system comprising a photovoltaic array, an inverter, and an energy storage device is operated according to the following steps: (a) accessing irradiance data for a past time period; (b) acquiring an irradiance forecast for a future time period having a length of not more than 15 minutes and having a cumulative irradiance forecast of between 20% and 80% of clear-sky irradiance; (c) calculating a smoothed energy target-value for an imminent time step within the future time period, using the irradiance data for the past time period and the forecasted irradiance for the future time period; and (d) during the time step, delivering a quantity of energy to the inverter based on the calculated smoothed energy target-value. The energy storage device stores energy when more is produced than delivered, and discharges energy when more is delivered than is produced.

Methods and systems for smoothing output of a solar energy system

A solar energy system includes a photovoltaic (PV) assembly and a drive system. The PV assembly comprises a support subassembly and an array of PV panels pivotable therewith about a longitudinal axis of the PV assembly. The drive system comprises a motor assembly comprising an electric motor and a gearing arrangement, and a pivot wheel comprising a hoop-portion and joined to the PV assembly. The hoop portion includes an outer circumferential channel, and two opposing catches defining a maximum pivot range. A chain resides partly within the circumferential channel, is engaged with the two opposing catches, and is also in geared communication with the motor assembly such that the motor is operable to rotate the pivot wheel. In some embodiments, the opposing catches define a maximum pivot range through an arc of more than &#x3c0; radians and less than 2&#x3c0; radians.

Solar energy system and geared drive system

Images representative of cloud shadows with respect to a field of heliostats can be used to adjust operation of a solar energy system. For example, images of a field of heliostats and shadows produced by the clouds can be obtained. Additionally or alternatively, images of the sky and clouds can be obtained. The images can be analyzed to determine a shading parameter. Based on the shading parameter, an operating parameter of the solar energy system can be changed or maintained. For example, the operating parameter may include aiming directions for one or more of the heliostats. Cloud characteristics in addition to the location of the cloud shadow can be used in determining the shading parameter. Such characteristics can be used in determining if and/or how to change the operating parameter of the solar energy system.

Method and apparatus for operating a solar energy system to account for cloud shading

Systems and methods for directly monitoring energy flux of a solar receiver in a solar energy-based power generation system include measuring infrared radiation emanating from the solar receiver. Such measurement can be achieved using one or more infrared thermography detectors, such as an IR camera. Resulting thermal data obtained by the imaging can be used to determine energy flux distribution on the receiver. A user or a system controller can use the determined flux distribution to adjust heliostat aiming to achieve a desired operation condition. For example, heliostats can be adjusted to achieve a uniform energy flux distribution across the external surface of the receiver and/or to maximize heat transfer to a fluid flowing through the receiver within system operating limits.

Systems and methods for control of a solar power tower using infrared thermography

Adherence to flux or resultant measurable parameter limits, ranges, or patterns can be achieved by directing heliostat mounted mirrors to focus on aiming points designated on the surface of a solar receiver. Different heliostats can be directed to different aiming points, and a heliostat can be directed to different aiming points at different times. The cumulative flux distribution resulting from directing a plurality of heliostats to any aiming point on a receiver surface can be predicted by using statistical methods to calculate the expected beam projection for each individual heliostat or alternatively for a group of heliostats. Control of the heliostats in a solar power system can include designating aiming points on a receiver from time to time and assigning heliostats to aiming points from time to time in accordance with an optimization goal.

Devices, methods, and systems for control of heliostats

A solar energy collection system includes a primary solar receiver and a secondary solar receiver. The secondary solar receiver generates steam using energy from solar radiation incident thereon. The primary solar receiver receives the generated steam from the secondary solar receiver and superheats the steam using energy from solar radiation incident thereon. A plurality of heliostat-mounted mirrors reflects incident solar radiation onto one of the primary and secondary solar receivers. A controller aims a portion of the heliostat-mounted mirrors at the primary solar receiver such that a predetermined thermal profile is provided on a surface of the primary solar receiver.

Method and control system for operating a solar power tower system

A solar energy collection system has a solar receiver with an external surface configured for high absorption of light incident thereon. The solar receiver also has a plurality of light-reflecting elements arranged on the external surface. The light-reflecting elements produce at least partially diffuse reflection of light energy incident thereon. Heliostats concentrate solar radiation onto the external surface of the solar receiver. An imaging device provides a digital image of at least a portion of the external surface of the solar receiver. A controller can control the heliostats in response to apparent brightness of the light-reflecting elements as represented in the digital image.

Solar receiver with energy flux measurement and control

A multi-mode solar power generation system can include a first energy conversion system that generates electricity from a working fluid heated by a portion of solar radiation focused by a plurality of heliostats. The multi-mode solar power generation system can also include a second energy conversion system that generates electricity from an unused portion of the focused solar radiation using a different energy conversion mode than that of the first energy conversion system. The second energy conversion system can include one or more photovoltaic converters, which directly convert solar radiation to electricity. The unused radiation from the first energy conversion system can include radiation spillage or dumped radiation from a thermal receiver of the first energy conversion system.

Growing community of inventors

Jerusalem, Israel

Gil Kroyzer