TWO CONCAVE CYLINDRICAL REFLECTORS AND A ROTATABLE CONCAVE QUADRANT REFLECTOR REFLECTING SUNLIGHT ON AN ABSORBER�

摘要

ABSTRACT OF THE INVENTION The present invention named as Two concave cylindrical reflectors and a rotatable concave quadrant reflector reflecting sunlight on an absorber� is a solar thermal energy collection device. The said device comprises of following components. 1) A framed structure� provided to hold and support two concave cylindrical sunlight reflectors, and a rotatable quadrant sectioned concave cylindrical sunlight reflector mounted on a shaft, and a means for solar energy absorption� in predefined relative positions. Said framed structure is fitted with wheels (20) for allowing ˜linear movement and rotation™ of said framed structure� to do orientation of said device towards direction of incidence of sunlight. 2) A shaft mounted on said framed structure either by means of ˜pedestal type ball bearings or any other suitable bearings™ fixed over gusset plates provided to said framed structure. Said shaft is used to ˜support, and allow turning of a ˜quadrant sectioned concave cylindrical sunlight reflector™ for orientation of said reflector such that it is capable of reflecting most of the incident sunlight on bottom side face of a solar energy absorber fixed on said framed structure. 3) A rotatable quadrant sectioned concave cylindrical sunlight reflector� is held and supported by said shaft such that said reflector can be turned and rotated around longitudinal axis of said shaft. Said quadrant sectioned concave cylindrical sunlight reflector� is provided to serve the purpose of reflecting most of the incident sunlight on a ˜means for solar thermal energy absorption™ provided along top side face of its supporting framed structure. Said reflector comprises of ˜a rotatable means having concave cylindrical surface suitable for holding and supporting sunlight reflective material so as to form quadrant sectioned concave cylindrical sunlight reflector™. It is fitted with ˜means for specular reflection of most of the incident sunlight™. 4) Two concave cylindrical sunlight reflectors™ supported on said framed structure on either side of said quadrant reflector such that said each one concave reflector™s one side outer lower flat end is adjacent to outer lower end of said bottom side quadrant reflector when said quadrant reflector is rotated towards that side such that one of its outer radial plane is ˜parallel and adjacent™ to bottom side face of said absorber. In this position ˜one concave cylindrical sunlight reflector adjacent to a vertical side of absorber facing the Sun™ is capable of reflecting most of incident sunlight on said quadrant reflector (80) and also on adjacent faces of said absorber. Said each one ˜concave cylindrical sunlight reflector™ comprises of an ˜acute angle concave cylindrical frame or surface™ and fitted with ˜good quality sunlight reflective material™ on their concave surfaces to form a concave cylindrical sunlight reflector for specular reflection of most of incident sunlight�. 5) A means for solar energy absorption� supported at suitable elevation on top side face of said framed structure (used to support all components of the device) in predefined position such that said absorber is capable of intercepting and receiving most of sunlight reflected by said all reflectors. 6) Detachable flat mirrors provided separately along either side outer vertical planes of above said each one reflector (among above said all reflectors), to serve the purpose of reflecting the sunlight tending to move outwards through vertical outer planes of said reflectors, towards said solar energy absorber.