Abstract: A solar thermal energy collector includes a receptacle and a tube positioned within the receptacle and having a closed end. The tube includes a divider cross-sectionally bifurcating the tube. The divider is spaced apart from the closed end of the tube to allow fluid communication between two bifurcated portions of the tube. A fluid is circulated through the two bifurcated portions of the tube for transferring of the solar thermal energy.

Abstract: A solar thermal energy collector includes a receptacle and a tube. The tube is adapted to fit within the receptacle and defines a first region within the tube and a second region between the tube and an internal surface of the receptacle. A fluid is circulated between the first region and the second region for transferring of the solar thermal energy.

Abstract: An apparatus for collecting solar energy includes a receptacle adapted for receiving solar thermal energy, an insert adapted for counter-flow located within the receptacle, and an absorption device positioned proximate to and substantially conforming to at least a portion of an internal surface of the receptacle and thermally coupled to the insert.

Abstract: A nonimaging light concentrator system including a primary collector of light, an optical mixer disposed near the focal zone for collecting light from the primary collector, the optical mixer having a transparent entrance aperture, an internally reflective housing for substantially total internal reflection of light, a transparent exit aperture and an array of photovoltaic cells disposed near the transparent exit aperture.

Abstract: A nonimaging light concentrator system including a primary collector of light, an optical mixer disposed near the focal zone for collecting light from the primary collector, the optical mixer having a transparent entrance aperture, an internally reflective housing for substantially total internal reflection of light, a transparent exit aperture and an array of photovoltaic cells disposed near the transparent exit aperture.

Abstract: A solar concentrator device is disclosed. The device includes a solar concentrating panel having a longitudinal axis and defining a parabolic surface having a focal line substantially parallel to its longitudinal axis. The parabolic surface terminates in opposed longitudinal side edges. A mechanism is provided for rotating the panel about its longitudinal axis. Finally, an arrangement provides torsional support for the panel and includes a frame structure aligned obliquely to the longitudinal axis and extending between the opposed longitudinal side edges of the parabolic surface.