Patent ID: 6244264
Filing Date: 2001-06-12
Classification: F24S,Y02E

Abstract:
A passive solar collector wherein the sun is taken as a point source, comprising:a) a tube that is at least partially transparent;b) a first end and a second end connected to the tube to form a housing that can sustain a partial vacuum inside the housing;c) a first reflector disposed within the housing to reflect light from the point source that enters the housing, said first reflector comprising a reflective surface having a two dimensional shape having a longitudinal axis, said shape defined by integrating a differential equation of polar coordinates defined by: ##EQU9##where R is a radius vector from an origin to a point of reflection of a light edge ray from a reflector surface and .phi. is an angle between the R vector and an exit aperture external point of said concentrator and coordinates (R, .phi.) represent a point on a reflector curve and a is an angle the light edge ray from an origin point makes with a normal to said reflector curve, said reflector surface defined by said reflector curve which allows said light edge ray on said reflector curve to vary as a function of position;d) a central tube disposed within the housing; ande) an absorber disposed within the housing so as to absorb light reflected by the first reflector and deliver absorbed light to the central tube.