Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1977-11-07
1983-01-18
Yeung, James C.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126445, 126449, F24J 302
Patent
active
043687253
ABSTRACT:
A solar window which can alternatively act either as a passive solar heat collector or an active solar heat collector. A substantially transparent pair of panels are mounted in opposed position to each other and define a chamber therebetween. When it is desired to admit solar energy to the structure in which the window is mounted, air is permitted to be retained in the chamber and sunlight to pass through the window to thus heat the interior of the structure. When heat is not required in the structure, a second fluid which may be an optically dense solar energy absorbent or reflective fluid is passed through the chamber so as to respectively absorb or reflect the sunlight passing into the chamber, and in this way reduce the amount of solar heat passing through the window, and, in the case of an absorbent fluid, to retain the heat for later use. Pleasing architectural aesthetics or practical advantages in the case of greenhouses may further be obtained by passing colored fluid through the chamber which fluid may additionally achieve the selective absorption of light of certain wavelengths passing through the window. An alternative embodiment of the invention includes providing the inside window panel with grooves adjacent the chamber and disposed at such an angle thereto that radiation in a spectral region in which the material of said window is at least partially transparent attempting to pass outwardly through said window is substantially reflected back into said structure. Accordingly the angle at which the walls of such grooves are disposed must exceed the critical angle to support total internal reflection for the particular materials utilized.
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Rabl, Ari., "Prisms with Total Internal Reflection as Solar Reflectors", Solar Energy, vol. 19, pp. 555-565, Pergamon Press, 1977.
Doherty Robert J.
Yeung James C.
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