Esolar, Inc.

Other

Porter Arbogast

Christian T Gregory

Dan Reznik

Michael Slack

Bill Gross

Quoc Pham

William Tod Gross

Steve Schell

A solar power plant includes central receiver modules arranged in a regular pattern. Each central receiver module includes a tower, a central receiver mounted on the tower, and a heliostat array bounded by a polygon. The heliostat array includes heliostats with mirrors for reflecting sunlight to the central receiver. The heliostats are grouped in linear rows and each of the rows is parallel to another row. The locations of the heliostats are staggered between adjacent rows. The power plant also includes a power block for aggregating power from the central receivers and power conduits for transferring power from the central receivers to the power block.

Heliostat array layouts for multi-tower central receiver solar power plants

A receiver system for harnessing solar radiation. Embodiments of a receiver system include a receiver including one or more receiver elements, each receiver element including: a plurality of transparent tubes including a first tube and at least one second tube at least partially within the first tube; a first passage interposed between the first tube and the at least one second tube, the first passage having an inlet and an outlet; a second passage within the at least one second tube, the second passage having an inlet and an outlet; and an absorber in the at least one second tube, the absorber adapted to absorb the solar radiation. In some embodiments, a receiver further includes a housing having at least one transparent portion, the housing configured to enclose the plurality of receiver elements, whereby a third passage is formed between the first tube and the housing.

Solar thermal receiver for medium- and high-temperature applications

A mirror assembly for use with a focusing or concentrating solar collector or the like has rows and columns of individual rectangular mirrors mounted by means of flexible cords passing through eyelets on the edges of each of the mirrors, with the cords secured to an open rectangular frame. The cords are selectively tensioned; and when the cords are under tension, all of the mirrors are maintained in a substantially flat orientation in a plane parallel to the plane of the frame. The frame is secured to the top of a support structure which has mirror mounts located beneath each of the mirrors in the mirror assembly. Magnets are provided of on the side of the mirrors which face the underlying support structure; and when the tension in the cords is released, the mirrors drop into place on top of each of the mirror mounts of the support structure, and are held in place by means of the magnets. The angular orientation of the mirrors then is controlled by the operation of the solar collector mechanism. Subsequent retensioning of the cords overcomes the magnetic attraction of the mirrors to the mirror mounts; and the mirrors are removed from the support structure and held in place on the frame by means of the flexible cords. The entire frame of mirrors then may be removed for subsequent storage or replacement.

Multiple mirror assembly for solar collector

Multiple mirrored apparatus utilizing solar energy can be utilized to direct the rays of the sun in a concentrated and steadily directed fashion to one spot during the whole of the period of sunshine. Such apparatus can be termed a heliostat. As disclosed, the heliostat includes a plurality of mirrors which are arranged in an array of rows and columns, wherein each mirror has a reflective surface and a rear surface and a central axis through each surface. Each elongated rod of a like plurality is coupled at one end thereof to the rear surface of the corresponding mirror and oriented along the central axis thereof. Means are provided for pivoting each rod near the one end with respect to a plurality of support structures. First guide rails are coupled to the support structures, each pair being spaced apart to form a track therebetween for receiving depending portions of the rods so that the rods traverse pivotable paths within the tracks, within planes each perpendicular to a first common fixed plane, such as a north-south plane. Each of a plurality of pairs of second guide rails, each pair being spaced apart to form a track therebetween, receive depending portions of the rods near their opposite ends so that the rods traverse pivotable paths within the tracks within planes each perpendicular to a second common fixed plane, such as, for example, the east-west plane. The second common fixed plane is perpendicular to the first fixed plane. A plurality of arms couple the second guide rails to a frame so that the arms are pivotable with respect to the frame. First means are provided for pivoting all of the first guide rails along loci parallel to the first fixed plane, and second means are provided for pivoting all of the second guide rails along loci parallel to the second fixed plane. One of the pivoting means can be reciprocated relative to the apparent east-west movement of the sun, whereas the other reciprocating means can be pivoted relative to the apparent north-south movement of the sun. In one form, the heliostat can include a mirror, means for pivoting the mirror about an east-west direction on a daily cycle and means for continuously (not intermittently) pivoting the mirror about a north-south direction on an annual cycle.

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Pasadena, CA, United States of America

Porter Arbogast