# US 10,766,792 B2 · Water-savings adiabatic spray system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,792 B2 - Document ID: US10766792B2 - Status: Granted - Kind: B2 - Application number: 15/608,319 - Filed: 2017-05-30 - Published: 2018-01-04 - Granted: 2020-09-08 - Earliest claimed: 2016-05-27 - Assignees: Evapco, Inc. - Applicants: Evapco, Inc. - Inventors: John W. Lane; Davey J. Vadder - Web page: https://patentgrep.com/patent/US10766792B2 ## CPC - C02F 1/441: {by reverse osmosis} - B67D 7/80: Arrangements of heating or cooling devices for liquids to be transferred - C02F 5/083: {Mineral agents} - C02F 9/00: Multistage treatment of water, waste water or sewage - C02F 1/32: with ultraviolet light - C02F 1/42: by ion-exchange (ion-exchange in general B01J) - C02F 1/58: by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00) - C02F 1/66: by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58) - C02F 5/086: {Condensed phosphates} - C02F 2103/023: {Water in cooling circuits} - Y02B 30/54: Free-cooling systems - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - B67D: DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR (cleaning pipes or tubes or systems of pipes or tubes B08B9/02; emptying or filling of bottles, jars, cans, casks, barrels, or similar containers, not otherwise provided for B67C; water supply E03; pipe systems F17D; domestic hot-water supply systems F24D; measuring volume, volume flow, mass flow or liquid level, metering by volume G01F; coin-freed or like apparatus G07F) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A water savings system and method for reducing the amount of water needed for adiabatic cooling including the use of a softener and a reverse osmosis device, in which tap water, softened if necessary, is delivered to a reverse osmosis device and softened water alone, reverse osmosis reject water, or softened water combined with reverse osmosis reject water is delivered to spray nozzles for cooling, and reverse osmosis pure water is stored and used periodically to flush the coils to inhibit and/or prevent corrosion from dissolved salts and other solids in the spray water. ## Claims ### Claim 1 A water supply system for delivering adiabatic pre-cooling water to an air flow entering a heat exchanger, comprising: a water softener configured to receive water from a water source; a reverse osmosis device configured to receive softened water from said water softener; an RO-permeate storage tank configured to receive RO-permeate water from said reverse osmosis device; a spray pump configured to deliver softened water to spray nozzles directed at said air flow; a flush pump configured to deliver RO-permeate water from said RO-permeate storage tank to an outside surface of a coil of said heat exchanger, said water supply system further comprising a RO-reject storage tank configured to receive RO-reject water from said reverse osmosis device; wherein said spray pump is configured to receive cooling water from said RO-reject storage tank for delivery to said spray nozzles. ### Claim 2 (depends on 1) A water supply system according to claim 1, wherein said system is piped to permit delivery of RO-permeate water in said RO-permeate storage tank to said spray nozzles via said spray pump. ### Claim 3 A water supply system for delivering adiabatic pre-cooling water to an air flow entering a heat exchanger, comprising: a water softener configured to receive water from a water source; a reverse osmosis device configured to receive softened water from said water softener; an RO-permeate storage tank configured to receive RO-permeate water from said reverse osmosis device; a spray pump configured to deliver softened water to spray nozzles directed at said air flow; a flush pump configured to deliver RO-permeate water from said RO-permeate storage tank to an outside surface of a coil of said heat exchanger, said water supply system further comprising a combining and storage tank configured to receive softened water directly from said softener, and RO-reject water from said reverse osmosis device, and wherein said spray pump is configured to deliver combined water softened and RO-reject water from said combining and storage tank to said spray nozzles. ### Claim 4 (depends on 1) A water supply system according to claim 1, wherein said RO-permeate storage tank is a pressurized tank. ### Claim 5 (depends on 1) A water supply system according to claim 1, further comprising piping connected to said reverse osmosis device to deliver RO-reject water to a drain, and wherein said spray pump receives softened water directly from said water softener. ### Claim 6 (depends on 5) A water supply system according to claim 5, further comprising an RO-reject pump connected to said reverse osmosis device for pumping RO-reject water to said spray pump. ### Claim 7 (depends on 3) A water supply system according to claim 3, wherein said RO-permeate storage tank is a pressurized tank. ### Claim 8 (depends on 3) A water supply system according to claim 3, further comprising piping connected to said reverse osmosis device to deliver RO-reject water to a drain, and wherein said spray pump receives softened water directly from said water softener. ### Claim 9 (depends on 8) A water supply system according to claim 8, further comprising an RO-reject pump connected to said reverse osmosis device for pumping RO-reject water to said spray pump.