Method and apparatus for thermally circulating a liquid

Claim 2

Apparatus for transferring heat from an elevated location to a lower location, comprising: first and second stand pipes adapted to contain a fluid and extending from an elevated location to a lower location, the two stand pipes connected for flow therebetween at the lower ends thereof, means for supplying heat to one of the stand pipes at the elevated location, means for collecting liquid expelled from the stand pipe to which heat is added and conveying the collected fluid to the other stand pipe, and means for extracting heat from one of the stand pipes at the lower location, the stand pipes being in a mutual, thermal-conductive relationship at least over a substantial portion of the lengths thereof below the means to supply heat to a stand pipe and above the means to extract heat from the stand pipes, whereby heat may be pumped from the elevated location to the lower location with the use of a fluid and the fluid will be in approximate thermal equilibrium between the heat input and heat extraction means thereby enabling the heat to be so transferred over substantial heights.

Claim 3

Apparatus as set forth in claim 1 wherein the stand pipes are concentric over a substantial portion of their length and an expansion chamber is attached to the upper terminus of the outer stand pipe.

Claim 4

Apparatus as set forth in claim 2 wherein heat is supplied to the outer of the concentric stand pipes through the heat input means, and the inner of the concentric stand pipes includes a flared upper portion positioned below the expansion chamber and extending towards and being adjacent to but not in contact with the wall of the outer stand pipe to collect liquid expelled upward when heat is supplied to the outer stand pipe.

Claim 5

Apparatus as set forth in claim 2 wherein the outer stand pipe is concentric with the inner stand pipe above and below the means through which heat is supplied but bypasses the inner stand pipe at such means, and the inner stand pipe extends into the expansion chamber attached to the outer stand pipe.

Claim 6

Apparatus for transferring heat from an elevated location to a lower location, comprising: first and second concentric stand pipes, the first stand pipe being disposed concentrically within the second stand pipe and being in thermalconductive relationship so as to provide substantial thermal equilibrium between the fluids in the stand pipes, the bottom portion of the second stand pipe being closed and spaced from the open bottom portion of the first stand pipe to permit flow therebetween, the upper terminus of the first stand pipe being enlarged in a flared manner extending adjacent to but spaced from the wall of the second stand pipe, the upper terminus of the second stand pipe being enlarged into a closed expansion chamber above the flared portion of the first stand pipe, means to supply heat to the second stand pipe at an elevated location, and means to extract heat from the second stand pipe at a lower location whereby a fluid may be contained in the stand pipes with the level thereof below the flared portion of the first stand pipe and above the means to supply heat to the second stand pipe and, upon the input of sufficient heat through such means, the fluid will be expelled upward in the second stand pipe, collected by the flared portion of the first stand pipe and, as a result of the thus produced unequal levels in the stand pipes, flow downward in the first stand pipe into the second stand pipe at the bottom portion thereof, thus providing a flow of heat in the fluid at the heat extraction means.

Claim 7

Apparatus for transferring heat from an elevated location to a lower location, comprising: first and second concentric stand pipes, the first stand pipe being disposed concentrically within the second stand pipe and being in thermalconductive relationship so as to provide substantial thermal equilibrium between the fluids in the stand pipes, the bottom portion of the second stand pipe being closed and spaced from the open bottom portion of the first stand pipe to permit flow therebetween, the upper terminus of the first stand pipe being enlarged in a flared manner extending adjacent to but spaced from the wall of the second stand pipe, the upper terminus of the second stand pipe being enlarged into a closed expansion chamber above the flared portion of the first stand pipe, means to supply heat to the second stand pipe at an elevated location, and means to extract heat from the second stand pipe at a lower location whereby a fluid may be contained in the stand pipes with the level thereof below the flared portion of the first stand pipe and above the means to supply heat to the second stand pipe and, upon the input of sufficient heat through such means, the fluid will be expelled upward in the second stand pipe, collected by the flared portion of the first stand pipe and, as a result of the thus produced unequal levels in the stand pipes, flow downward in the first stand pipe into the second stand pipe at the bottom portion thereof, thus providing a flow of heat in the fluid at the heat extraction means.