Concentrating vacuum isolated solar energy collection apparatus employing reflector

An improved heat exchange means comprising:

• a pair of concentrically arranged inner and outer spaced, closed objects,
• said inner object comprising a material to be heated by solar rays impinging on at least a part of its outer periphery,
• the space between said objects containing less than atmospheric pressure therein,
• said outer object being at least partially transparent for transmitting solar rays to said inner object,
• an energy transfer means arranged within the space between said objects for selectively moving into contact with and away from the outer periphery of said inner object,
• a control means for selectively controlling the movement of said energy transfer means, and
• a cover spacedly positioned and coaxially arranged around said inner and outer objects,
• said cover defining between it and the outer periphery of said outer object a fluid conducting space.