# US 2014/0360194 A1 · Toroidal heat exchanger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360194 A1 - Document ID: US20140360194A1 - Status: Published application - Kind: A1 - Application number: 14/466,360 - Filed: 2014-08-22 - Published: 2014-12-11 - Earliest claimed: 2008-10-30 - Assignees: Power Generation Technologies Development Fund, L.P. - Applicants: Power Generation Technologies Development Func L.P. - Inventors: Ernst BERGEN - Web page: https://patentgrep.com/patent/US20140360194A1 ## CPC - F23R 3/52: Toroidal combustion chambers - F01D 1/36: using fluid friction - F02C 3/165: {the combustion chamber contributes to the driving force by creating reactive thrust} - F02K 7/005: {the engine comprising a rotor rotating under the actions of jets issuing from this rotor} - F23R 3/06: Arrangement of apertures along the flame tube - F23R 3/28: characterised by the fuel supply (burners F23D) - F23R 3/34: Feeding into different combustion zones - F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00) ## Abstract A toroidal combustion chamber and a plurality of plates are disposed with respect to one another such that their labyrinthine walls are juxtaposed and form labyrinthine conduits leading from an exhaust outlet of the toroidal combustion chamber to an exit perpendicular to the exhaust outlet. ## Claims ### Claim 1 A device, comprising: a toroidal combustion chamber having an inner surface and an outer surface, wherein the inner surface of the toroidal combustion chamber comprises a plurality of combustible fluid inlets, and the outer surface comprises an exhaust outlet; and at least one plate disposed adjacent to the outer surface of the toroidal combustion chamber, the at least one plate comprising a labyrinthine wall circumscribing the exhaust outlet and in combination with the outer surface of the toroidal combustion chamber forms a labyrinthine conduit between the exhaust outlet and an opening on the perimeter of the at least one plate that is perpendicular to the exhaust outlet. ### Claim 2 (depends on 1) The device of claim 1, further comprising a labyrinthine wall on the outer surface of the toroidal combustion chamber which forms the labyrinthine conduit with the at least one plate. ### Claim 3 (depends on 1) The device of claim 1, further comprising a spacer ring disposed adjacent to the at least one plate and the toroidal combustion chamber such that a substantially cylindrical channel is formed through the spacer ring and the at least one plate. ### Claim 4 (depends on 3) The device of claim 3, wherein the spacer plate is between the toroidal combustion chamber and the at least one plate. ### Claim 5 (depends on 3) The device of claim 3, wherein the spacer plate is disposed on the face of the at least one plate not in contact with the toroidal combustion chamber. ### Claim 6 (depends on 1) The device of claim 1, wherein the labyrinthine wall of the at least one plate is a substantially circular spiral. ### Claim 7 (depends on 2) The device of claim 2, wherein the labyrinthine wall of the toroidal combustion chamber is a substantially circular spiral. ### Claim 8 (depends on 2) The device of claim 2, wherein the labyrinthine wall on the outer surface of the toroidal combustion chamber is complementary to the labyrinthine wall on the at least one plate. ### Claim 9 (depends on 1) The device of claim 1, wherein a combination of at least one plate and the toroidal combustion chamber is bolted together between a plurality of sandwich plates. ### Claim 10 (depends on 2) The device of claim 2, wherein a combination of at least one plate and the toroidal combustion chamber is bolted together between a plurality of sandwich plates. ### Claim 11 A device, comprising: a toroidal combustion chamber having a labyrinthine wall on its outer surface; a plurality of plates disposed over the labyrinthine wall of the toroidal combustion chamber creating at least one axial conduit and a plurality of perpendicular conduits extending from an exhaust outlet of the toroidal combustion chamber, wherein at least one of the plurality of plates has at least one labyrinthine wall on a surface facing the toroidal combustion chamber and aligned with the labyrinthine wall of the toroidal combustion chamber to form one of the plurality of perpendicular conduits from the exhaust outlet, wherein at least one plate terminates the axial conduit from the exhaust outlet. ### Claim 12 (depends on 11) The device of claim 11, further comprising at least one plate of the plurality of plates has labyrinthine walls on surfaces facing toward and away from the toroidal combustion chamber. ### Claim 13 (depends on 12) The device of claim 12, further comprising at least one plate without any labyrinthine walls on its surface disposed on the labyrinthine wall on the surface facing away from the toroidal combustion chamber. ### Claim 14 (depends on 11) The device of claim 11, wherein the perpendicular conduits have a cross-section that is circular, polygonal, or combinations thereof. ### Claim 15 (depends on 11) The device of claim 11, wherein the labyrinthine wall of the toroidal combustion chamber is substantially a circular spiral. ### Claim 16 (depends on 15) The device of claim 15, wherein the labyrinthine wall of at least one of the plurality of plates is substantially a circular spiral. ### Claim 17 (depends on 11) The device of claim 11, wherein at least one plate with a labyrinthine wall on a surface facing the toroidal combustion chamber and a labyrinthine wall on a surface facing away from the toroidal combustion chamber is disposed on the toroidal combustion chamber and at least one plate without a labyrinthine wall is disposed on the at least one plate with the labyrinthine walls. ### Claim 18 (depends on 11) The device of claim 11, further comprising a material selected from the group consisting of SiC, SiN, alumina, and graphite. ### Claim 19 (depends on 11) The device of claim 11, further comprising a disc pack disposed within the toroidal combustion chamber. ### Claim 20 (depends on 11) The device of claim 11, further comprising a sleeve circumscribing the toroidal combustion chamber and the plurality of plates.