Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1984-06-22
1985-08-13
Jones, Larry
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126428, 126446, 126448, F24J 302
Patent
active
045343365
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to improvements to solar collectors, i.e. to apparatus adapted for collecting the heat energy contained in solar radiation and transferring it, at least in part, to a heat-carrying fluid. The aim of the invention is more particularly to improve solar collectors comprising, on the one hand, a heat absorbing wall formed by at least two panels made from a heat conducting material sloping with respect to each other so as to form a dihedron and, on the other hand, at least one duct for the heat-carrying fluid, formed from a heat-conducting material and extending to the bottom of the dihedron.
From the patent application FR 75 21 471 (published under the No. 2 316 553), a solar collector is already known comprising a heat absorber formed by a corrugated plate having a saw-tooth cross section, with ducts for the heat carrying fluid resting at the bottom of each hollow of the plate.
However, this document furnishes no practical embodiment of this general arrangement which, if applied as explained and shown in the document in question, could provide no interesting result because of the very poor heat conduction between the heat absorber and the heat carrying fluid ducts.
Furthermore, this known solar collector is intended in the position of use to be disposed horizontally, the plate of the heat absorber being turned towards the sky. No solution is proposed for recovering the solar radiation with a maximum of efficiency whatever the time of the year when the collector is used.
The invention has therefore essentially as its aim to remedy, as much as possible, the above outlined disadvantages and to provide a solar collector adapted so that a maximum of the heat accumulated in the absorber is transmitted to the heat-carrying fluid, and this whatever the time of the year, and so that the thus improved collector is of simple structure, easy to manufacture, to mount and to maintain and of a low overall cost.
To these ends, the solar collector in accordance with the invention is characterized by the combination of the following arrangements:
the two panels are joined together in the region of the apex of the dihedron, by a gutter opening inwards of the dihedron, made from a heat conducting material and taking on closely the outer form of the heat-carrying fluid duct which is housed thereinside and with which it is in heat-conducting contact,
and the two panels form therebetween an angle at least equal to the angle between the winter solstice and the summer solstice at the location where the collector is installed, the two panels being, in the operating position of the collector, situated in planes directed approximately respectively towards said solstices.
Preferably, the angle formed by the two panels is substantially greater than the angle between the winter and summer solstices and is between 65.degree. and 70.degree. (FIG. 1).
In a preferred embodiment, the two panels and the connecting gutter form a single piece.
To simplify the procedure for assembling the collector, the panels and the gutter are formed from an elastically deformable material so that the duct may be fitted into the gutter by resiliently urging the edges of this latter apart.
A preferred arrangement of the collector of the invention consists in the absorbing wall comprising a plurality of pairs of panels forming a plurality of dihedrons, in all the dihedrons being in heat conducting contact with each other and in all the panels being disposed one after the other in a saw-tooth configuration.
Advantageously, the collector further comprises a closed enclosure adapted to support the heat-absorbing wall, the wall--front wall--of the enclosure the closest to the dihedrons projecting from the heat-absorbing wall being made from a transparent material and the opposite wall--rear wall--being formed from a heat insulating material and, preferably, the inner surface of the rear wall is reflecting.
In a particular embodiment, the heat-absorbing wall and the rear wall of the enclosure define a space through which a gas to be heated
REFERENCES:
patent: 4014313 (1977-03-01), Pedersen
patent: 4114598 (1978-09-01), Van Leeuwen
patent: 4271819 (1981-06-01), Farrell
patent: 4296741 (1981-10-01), Harder
patent: 4337754 (1982-07-01), Conger
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