# US 12,222,781 B2 · Heating system using heat extracted from a computer processing unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,781 B2 - Document ID: US12222781B2 - Status: Granted - Kind: B2 - Application number: 17/209,716 - Filed: 2021-03-23 - Published: 2021-09-02 - Granted: 2025-02-11 - Earliest claimed: 2019-05-07 - Assignees: 10130163 Manitoba Ltd. - Applicants: Stephane Gauthier; Oscar Miller; Hartley Torrealba; Anna Le Wong - Inventors: Stephane Gauthier; Oscar Miller; Hartley Torrealba; Anna Le Wong - Web page: https://patentgrep.com/patent/US12222781B2 ## CPC - G06F 1/20: Cooling means - H05K 7/20236: {by immersion} - H05K 7/20272: {Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds} - H05K 7/20772: {within server blades for removing heat from heat source} - G06F 2200/201: Cooling arrangements using cooling fluid - Y02B 30/52: Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Computer processing systems are cooled and the otherwise wasted heat is extracted for space heating by providing a cooling dielectric liquid in a tank which passes from a manifold at the bottom of the tank through an array of tubular housings each having open top and bottom ends and containing row of the circuit boards. The housings sit on a divider sheet which has arrays of openings aligned with the housings allowing the liquid to pass from the manifold under little or no pressure so that the liquid flows through the housings by convection and stratifies to generate a layer of heated liquid above the open tops of the housings which can be tapped off to a heat exchanger. A heat pump acts on the cooling liquid to transfer heat to a heat transfer liquid which can be further heated by a boiler and transferred to existing heat dissipating loads. ## Claims ### Claim 1 A method for heating comprising: generating a stream of a heat transfer liquid; passing the heat transfer liquid through a heat source so that the heat source is able to apply heat to the heat transfer liquid; passing the heat transfer liquid through one or more heat dissipating loads to transfer heat from the heat transfer liquid to said one or more loads; providing in a tank a cooling liquid formed of a dielectric material; the tank containing a plurality of computer processing units, each comprising at least one computer processing board carrying electrical components which operates to carry out computer processing operations while generating heat; causing the cooling liquid to pass through the tank while causing cooling of the computer processing units so that the liquid is heated while cooling the computer processing units so as generate a first stream of cool liquid upstream of the heating of the liquid and a second stream of heated liquid downstream of the heating; circulating the cooling liquid from the second stream through a refrigeration cycle heat pump to the first stream so that the heat pump extracts heat from the second stream to return to the first stream; the heat pump transferring the extracted heat from the cooling liquid to the heat transfer liquid so that the heat transfer liquid passes from an inlet stream entering the heat pump to an exit stream leaving the heat pump and so that the heat transfer liquid passes both through the heat source and the heat pump for receiving heat from both. ### Claim 2 (depends on 1) The method according to claim 1 wherein the heat pump uses CO2 as a refrigerant. ### Claim 3 (depends on 1) The method according to claim 1 wherein the temperature in the second stream of the cooling liquid is less than 60 degrees C. and the temperature in the exit stream of the heat transfer liquid is greater than 70 degrees C. ### Claim 4 (depends on 1) The method according to claim 1 wherein the temperature in the second stream of the cooling liquid is in the range 40 degrees C. to 60 degrees C. and the temperature in the exit stream of the heat transfer liquid is in the range 70 degrees C. to 95 degrees C. ### Claim 5 (depends on 1) The method according to claim 1 wherein the temperature in at least one of said one or more heat dissipating loads is at least 90 degrees C. ### Claim 6 (depends on 1) The method according to claim 1 wherein the temperature in the first stream of the cooling liquid is less than 45 degrees C. and the temperature in the inlet stream of the heat transfer liquid is greater than 50 degrees C. ### Claim 7 (depends on 1) The method according to claim 1 wherein the temperature in the first stream of the cooling liquid is in the range 20 degrees C. to 45 degrees C. and the temperature in the inlet stream of the heat transfer liquid is in the range 50 degrees C. to 70 degrees C. ### Claim 8 (depends on 1) The method according to claim 1 wherein the cooling liquid is circulated between the second and first streams by a liquid pump. ### Claim 9 (depends on 1) The method according to claim 1 wherein the cooling liquid is circulated between the second and first streams by convection currents. ### Claim 10 (depends on 1) The method according to claim 1 wherein the heat pump is located outside the tank. ### Claim 11 (depends on 1) The method according to claim 1 wherein the heat source comprises a boiler. ### Claim 12 (depends on 11) The method according to claim 11, wherein the boiler and said one or more heat dissipating loads comprise an existing installation and the tank, a cooling liquid, plurality of computer processing units and heat pump are added to the existing installation as a supplementary heat source. ### Claim 13 (depends on 1) The method according to claim 1 wherein the heat source uses a combustion source. ### Claim 14 (depends on 1) The method according to claim 1 wherein the cooling liquid is a vegetable oil. ### Claim 15 (depends on 1) The method according to claim 1 wherein the cooling liquid is soy bean oil or canola oil. ### Claim 16 (depends on 1) The method according to claim 1 wherein the cooling liquid has the one or more of the following characteristics: Density: in the range of 0.92 g/m3 (7.667 lbs/gal) Kinematic Viscosity: in the range of 33-35 mm?/s @ 40° C. or in the range of 15 cSt @ 70° C. Dielectric Breakdown: 2 mm [kV] 235 (ASTM D6871) Boiling point: ≥360° C. Flash point: ≥265° C. (Closed Cup) Auto/self-ignition temperature: 401-404° C. (ASTM E659) Vapor Pressure: in the range 0 PA @≤200° C. Thermal Conductivity: in the range of 0.15089 W/mK @ 70° C. Specific Heat: in the range of 2.3472 kJ/kgK@ 70° C. ### Claim 17 A method for heating comprising: generating a stream of a heat transfer liquid; passing the heat transfer liquid through one or more heat dissipating loads to transfer heat from the heat transfer liquid to said one or more loads; providing in a tank a cooling liquid formed of a dielectric material; the tank containing a plurality of computer processing units, each comprising at least one computer processing board carrying electrical components which operates to carry out computer processing operations while generating heat; causing the cooling liquid to pass through the tank while causing cooling of the computer processing units so that the cooling liquid is heated while cooling the computer processing units so as generate a first stream of cool liquid upstream of the heating of the liquid and a second stream of heated liquid downstream of the heating; circulating the cooling liquid from the second stream through a heat pump to the first stream so that the heat pump extracts heat from the second stream to return to the first stream; the heat pump transferring the extracted heat from the cooling liquid to the heat transfer liquid so that the heat transfer liquid passes from an inlet stream entering the heat pump to an exit stream leaving the heat pump; wherein the temperature in the second stream of the cooling liquid is less than 60 degrees C. and the temperature in the exit stream of the heat transfer liquid is greater than 70 degrees C.. ### Claim 18 (depends on 17) The method according to claim 17 wherein the heat pump uses CO2 as a refrigerant. ### Claim 19 (depends on 17) The method according to claim 17, wherein the temperature in at least one of said one or more heat dissipating loads is at least 90 degrees C.