초록 ▼

An improved solar apparatus for heating above 100°C. is disclosed. Said apparatus comprises a solar collector means for heating a heat transferring gas, ducting means extending from said solar collector means for permitting moving of said gas past a heat storage medium whereby heat in said gas will

An improved solar apparatus for heating above 100°C. is disclosed. Said apparatus comprises a solar collector means for heating a heat transferring gas, ducting means extending from said solar collector means for permitting moving of said gas past a heat storage medium whereby heat in said gas will be transferred to said heat storage medium by directly contacting said heat storage medium, flow control means provided in said ducting whereby to permit said gas to flow to said heat storage medium when said solar collector means is radiated by the sun, and to permit said gas to pass through said heat storage medium for recovery of heat therefrom when said solar collector means is not radiated by the sun. The solar collecting means includes a plurality of collectors, each collector comprising two elongate concentric tubes connected together at each end to provide an annular space therebetween, said annular space being evacuated and wherein the outer surface of the inner tube has a selective surface to enhance solar energy absorption, said inner tube providing a passageway for said gas to be heated by said collector, and wherein said plurality of collectors are interconnected with others at their ends and to said ducting means so that said gas can pass therethrough and be heated and then passed into said ducting means at a temperature in excess of 100°C.

대표청구항 ▼

A solar steam generating apparatus for generating process steam in the temperature range of 100°C. to 200°C., said apparatus comprising: (a) a solar collector comprised of a plurality of tubular collectors from each of which air has been evacuated, each tubular collector comprising two elongated and

A solar steam generating apparatus for generating process steam in the temperature range of 100°C. to 200°C., said apparatus comprising: (a) a solar collector comprised of a plurality of tubular collectors from each of which air has been evacuated, each tubular collector comprising two elongated and concentric tubes connected together at each end to provide an evacuated annular space therebetween, the outer surface of the inner tube having a nickel black selective surface to enhance solar energy absorption, said inner tube providing a passageway for air to be heated by said tubular collector, a plurality of evacuated tubular collectors being serially interconnected at their adjacent ends so that said air can pass serially therethrough and be solar heated to a temperature in the range of 100°C. to 200°C., said evacuated tubular collectors being connected to form at least one return loop; (b) heat storage means, and first duct means communicating with said solar collector and with said heat storage means to permit the transfer of heat from said air heated by said solar collector to said heat storage means; (c) a steam generating heat exchanger, and water and steam lines directed to and from said heat exchanger; (d) second duct means communicating with said first duct means, said heat exchanger being mounted in said second duct means, (e) fan means associated with said first and second duct means for circulating air through said solar collector and said first and second duct means; (f) flow control means provided in said first and second duct means to selectively control the flow of air to and from said solar collector, said heat exchanger, and said heat storage means, the selective passage of heated air from said solar collector to said heat storage means transferring heat to the latter and the selective passage of heated air at the designated temperature over said heat exchanger and through said second duct means serving to generate steam in said heat exchanger, said flow control means permitting air passing through said second duct means over said heat exchanger to bypass said solar collector and pass from said second duct means upwardly through said heat storage means and back to said second duct means, thereby effecting steam generation from stored heat during periods when sun radiation on the solar collector is insufficient for steam generation, and wherein (g) said air passing through said solar collector, said first and second duct means and said heat storage means is at substantially atmospheric pressure during operation of the apparatus, whereby said apparatus provides 60-80% of the annual energy required for steam generation by said heat exchanger.