# US 12,114,465 B1 · Conversion of immersion cooling systems for use with single-phase operating fluids > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,465 B1 - Document ID: US12114465B1 - Status: Granted - Kind: B1 - Application number: 18/416,572 - Filed: 2024-01-18 - Granted: 2024-10-08 - Earliest claimed: 2023-07-25 - Assignees: Marathon Digital Holdings, Inc. - Applicants: Marathon Digital Holdings - Inventors: Frederick G. Thiel; Jimil M. Shah; Ashu Swami; Neer Jain; Chandra Katta - Web page: https://patentgrep.com/patent/US12114465B1 ## CPC - H05K 7/203: {by immersion} - B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)} - 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 7/20318: {Condensers} - H05K 7/20327: {Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) ## Abstract A two-phase or hybrid immersive cooling system is converted to a one-phase immersive cooling system, by (1) modifying a structure of the two-phase immersive cooling system such that a cooled portion of a substitute operating fluid flows into the operating fluid reservoir from a direction other than from above the reservoir, and (2) using a high boiling point composition as the substitute operating fluid. In some embodiments the tube condensers of the two-phase or hybrid immersive cooling system are retained, and in other embodiments at least portions of the regions previously occupied by tube condensers are used for heat exchangers, and optionally fluid pumps. In still other embodiments at least portions of the regions previously occupied by tube condensers are used for hot fluid holding tanks. ## Claims ### Claim 1 A method of converting a pre-modification immersive cooling system to a post-modification immersive cooling system, the pre-modification immersive cooling system configured to flow a cooled portion of an operating fluid into a reservoir from above the reservoir, the method comprising: modifying a structure of the pre-modification immersive cooling system such that a cooled portion of a substitute operating fluid flows into the reservoir from a direction other than above the reservoir; and using a high boiling point operating fluid as the substitute operating fluid. ### Claim 2 (depends on 1) The method of claim 1 wherein the pre-modification immersive cooling system has a bellows, and, wherein the step of modifying comprises removing the bellows. ### Claim 3 (depends on 1) The method of claim 1, wherein the pre-modification immersive cooling system has a tube condenser, and, wherein the step of modifying comprises positioning a barrier such that at least some of the substitute operating fluid flows past the barrier to contact the condenser. ### Claim 4 (depends on 3) The method of claim 3, further comprising installing a pump fluidly coupled with one or more fluid conducting passageways configured to pump amounts of the operating fluid that contact the condenser into a bottom 30% of the reservoir. ### Claim 5 (depends on 3) The method of claim 3, further comprising installing a distribution network within the reservoir, and pumping amounts of the operating fluid that contact the condenser into the distribution network. ### Claim 6 (depends on 3) The method of claim 3, further comprising allowing amounts of the fluid that contacts the condenser to flow into a bottom 30% of the reservoir entirely under convective forces. ### Claim 7 (depends on 3) The method of claim 3, further comprising installing a distribution network within the reservoir, and pumping amounts of the operating fluid that contact the condenser into the distribution network. ### Claim 8 (depends on 1) The method of claim 1, wherein the pre-modification immersive cooling system has a condenser, and further comprising removing at least a portion of the tube condenser, and installing at least part of a heat exchanger in a region previously occupied by the removed portion of the tube condenser. ### Claim 9 (depends on 8) The method of claim 8, wherein the heat exchanger comprises a brazed plate heat exchanger. ### Claim 10 (depends on 8) The method of claim 8 further comprising installing at least a portion of a pump in the region previously occupied by the removed portion of the tube condenser, and configuring the pump to cooperate with one or more fluid conducting passageways to pump amounts of the substitute operating fluid from a higher level in the reservoir, through the heat exchanger, and back into a lower level in the reservoir. ### Claim 11 (depends on 1) The method of claim 1, wherein the pre-modification immersive cooling system has a condenser, and wherein the step of modifying comprises (1) removing at least a portion of the tube condenser, (2) utilizing as a hot fluid holding tank, a region previously occupied by the at least portion of the tube condenser, and (3) configuring a pump to pump amounts of the substitute operating fluid from the hot fluid holding tank into a heat exchanger, and then into the reservoir. ### Claim 12 (depends on 11) The method of claim 11, further comprising situating the heat exchanger external to the region previously occupied by the at least portion of the tube condenser. ### Claim 13 (depends on 11) The method of claim 11, wherein the heat exchanger comprises a brazed plate heat exchanger. ### Claim 14 (depends on 11) The method of claim 11, wherein a wall of the hot fluid holding tank at least partially separates a remaining portion of the reservoir from a lumen of the hot fluid holding tank. ### Claim 15 (depends on 1) The method of claim 1, further comprising raising by at least two inches, a height of at least one heat generating component disposed within the reservoir. ### Claim 16 (depends on 1) The method of claim 1, further comprising raising by at least two inches, a height of at least one crypto miner disposed within the reservoir.