WO2023115061A1 - Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system - Google Patents
Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system Download PDFInfo
- Publication number
- WO2023115061A1 WO2023115061A1 PCT/US2022/081946 US2022081946W WO2023115061A1 WO 2023115061 A1 WO2023115061 A1 WO 2023115061A1 US 2022081946 W US2022081946 W US 2022081946W WO 2023115061 A1 WO2023115061 A1 WO 2023115061A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- electromechanical
- adiabatic
- make
- water
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 43
- 238000001816 cooling Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 230000003134 recirculating effect Effects 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
Definitions
- the present invention relates to adiabatic air pre-cooling systems for air-cooled condensers and coolers.
- Adiabatic air pre-cooling systems used with air-cooled condensers and air-cooled fluid coolers typically require an established liquid flow rate, typically of water, distributed over the entire adiabatic air pre-cooling media surface area, where a reservoir captures the residual liquid flow rate after leaving the adiabatic air pre-cooling media surface area, for subsequent disposal or recirculation.
- the purpose of the adiabatic air pre-cooling media is to pre-cool the air entering the air-cooled condensing coil or air-cooled fluid cooling coil thereby increasing thermal heat rejection capability.
- There are multiple adiabatic air pre-cooling medias including but not limited to, corrugated cellulose paper pads, corrugated PVC pads, and wire type PVC pads.
- an adiabatic system water is distributed over the adiabatic media and the water that is not evaporated during the air pre-cooling process is disposed of down the drain.
- recirculated system designs are employed.
- the current technology for recirculating liquid over the adiabatic air pre-cooling media is to utilize an electromechanical pump which requires electrical input power to provide the required liquid supply flow rate to establish the intended evaporation and heat transfer rates.
- a limitation with utilizing an electromechanical pump is the requirement for both rotating and electrical components and rendering the equipment nonoperative in the event either one fails. Moreover, even partial operation of this electromechanical device may cause a significant reduction in the evaporation and heat transfer rates which in turn reduces the overall process efficiency.
- Current liquid pump technology leads to the eventual, random failure of either the mechanical or electrical components which typically occurs during the most critical process operating hours. Elimination of both mechanical and electrical components while maintaining desired liquid flow rate to the heat transfer component(s) would present a significant advantage. In addition, eliminating or reducing electrical costs (input power) as well as required maintenance are also beneficial. Finding a solution to eliminate rotating and electrical components as well as input power while providing the required liquid recirculation flow rate to the adiabatic air pre-cooling media has been particularly challenging.
- This invention solves this problem by providing a solution that does not require any mechanical or electrical components to induce liquid flow, while providing both liquid recirculated and make-up flow rates to the adiabatic air pre-cooling media.
- the inventors have discovered that driving a non-electromechanical, pumpless device (ejector) with an external, liquid make-up supply, coupled with the interconnecting piping, manual and modulating valves, electronic sensors, and liquid distribution system can successfully provide the necessary liquid flow rate onto the adiabatic air pre-cooling media for a wide range of operating conditions.
- This pumpless device coupled with an external, liquid make-up supply/pressure compliments one another to eliminate the requirement for an electromechanical device (i.e., pump).
- the recirculation system requires no motor or motorized pump.
- the volume of entrained/recirculating fluid passing through the pumpless device in any time interval equals or exceeds the volume of the driving/motive fluid.
- Figure l is a representation of a prior art air cooled heat exchanger with adiabatic pads mounted on the upstream air side of the heat exchange coils over which pre-cooling water is circulated via electromechanical pump.
- Figure 2 is a schematic of a non-electromechanical, pumpless ejector device according to an embodiment of the invention.
- Figure 3 is a schematic of how a non-electromechanical, pumpless ejector device according to one embodiment of the invention may be used to replace an electromechanical pump in an otherwise standard adiabatic pre-cooled air cooled heat exchanger.
- Figure 4 is a schematic of how a non-electromechanical, pumpless ejector device according to an embodiment of the invention may be used to replace an electromechanical pump in an adiabatic pre-cooled air cooled heat exchanger without a controller or PLC.
- the non-electromechanical pumpless ejector device of the invention 1 features primary nozzle 3.
- Primary nozzle 3 is surrounded by an annular chamber 5.
- Recirculating fluid is introduced to the annular chamber 5 via side port 7.
- Recirculating fluid reservoir or “recirculation tank” 9 may be located upstream of side port 7 for providing recirculating liquid flow to the side port 7 and annular chamber.
- Makeup fluid is introduced to the primary nozzle 3 via end port 10.
- a mixing chamber 11 is located downstream of the primary nozzle 3.
- a high velocity constant flowing makeup liquid steam is directed thru primary nozzle 3 which generates a low static pressure in mixing chamber 11 directly downstream from the nozzle 3.
- FIGs 3 and 4 are schematics showing how the ejector device 1 of the invention is used to replace the electromechanical pump of the prior art adiabatic pre-cooled air-cooled heat exchanger of Figure 1.
- Adiabatic pads 13 are wetted by water distribution system 15 which may be a distribution trough, spray nozzles, slotted or perforated tubes, and the like.
- Water that is not evaporated from the adiabatic pads is collected in a collection device 17 (e.g., tray, drain channel, tube, pipe, etc.) at the bottom of the pads.
- a collection device 17 e.g., tray, drain channel, tube, pipe, etc.
- the present invention collects the not- evaporated water in a recirculation tank 9 from which it flows to side port 7 of the ejector 1. Flow of water from the recirculation tank 9 to side port 7 preferably requires no electromechanical pump and may be gravity or water pressure (by the height of the water in the recirculation tank) driven.
- the recirculation tank 9 may be provided with optional overflow feature and/or bleed valve 19.
- the motive force of the ejector of the invention is provided by the flow rate and pressure of the supply of make-up fluid.
- water filtration devices 21 and/or water softening and/or reverse osmosis devices may be provided (not shown).
- a water pressure regulator 23 may be provided to regulate the pressure of the make-up water.
- a modulating valve, “MV1” 25 is preferably provided to allow for adjustment of the make-up liquid supply (motive) flow rate to the pumpless ejector device 1 of the invention, which in turn drives the desired total liquid flow rate to the adiabatic pre-cooling media.
- the make-up fluid flow rate is equal to the evaporation rate of water from the adiabatic pads.
- the motive flow rate is adjusted using the modulating valve MV1 to match the adiabatic air pre-cooling media’s evaporation rate.
- a controller computer or programmed logic circuit 30 may be provided according to one embodiment to monitor water pressure via electronic water pressure sensor 27 and the rate of evaporation at electronic water level sensor 29 and to adjust water pressure and flow rate vie water pressure regulator 23 and modulating valve 25, respectively.
- Controller/PLC may be hardwired to sensor and regulator/modulator devices or connected wirelessly.
- a solenoid valve may be used in place of the computer controller/PLC, motorized valve MV1, pressure sensor and water level sensor of the embodiment of Figure 3.
- Inlet strainer 31 and recirculation tank strainer 33 may optionally be added as shown in Figure 4 to any embodiment.
- the total liquid flow rate at the outlet of the mixing chamber is the sum of the motive make-up supply liquid flow rate at a specific pressure, the recirculating liquid flow rate at side port 7 and the ejector’s entrainment ratio.
- the entrainment ratio is primarily a function of nozzle geometry and annulus diameter and may be adjusted by adjusting liquid supply pressure and back pressure.
- the non-electromechanical, pumpless liquid recirculation system will provide the total liquid flow rate to the adiabatic air pre-cooling media without any rotating or electrical components as well as comparable input power in comparison to an electromechanical pump.
- this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as outlined in the present disclosure and defined according to the broadest reasonable reading of the claims that follow, read in light of the present specification.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3241166A CA3241166A1 (en) | 2021-12-17 | 2022-12-19 | Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system |
CN202280083319.8A CN118524942A (en) | 2021-12-17 | 2022-12-19 | Non-electromechanical pumpless liquid recirculation system for adiabatic pre-cooling systems for air cooled condensers and coolers |
AU2022409865A AU2022409865A1 (en) | 2021-12-17 | 2022-12-19 | Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202163291101P | 2021-12-17 | 2021-12-17 | |
US63/291,101 | 2021-12-17 | ||
US18/068,238 | 2022-12-19 | ||
US18/068,238 US20230213285A1 (en) | 2021-12-17 | 2022-12-19 | Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023115061A1 true WO2023115061A1 (en) | 2023-06-22 |
Family
ID=86773656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2022/081946 WO2023115061A1 (en) | 2021-12-17 | 2022-12-19 | Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230213285A1 (en) |
AU (1) | AU2022409865A1 (en) |
CA (1) | CA3241166A1 (en) |
WO (1) | WO2023115061A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4187695A (en) * | 1978-11-07 | 1980-02-12 | Virginia Chemicals Inc. | Air-conditioning system having recirculating and flow-control means |
US4612778A (en) * | 1985-02-14 | 1986-09-23 | Medrano Michael V | Precooler for an evaporative cooler |
US5007582A (en) * | 1989-11-14 | 1991-04-16 | Tlv Company, Limited | Reduced pressure steam heat treating device |
US20090014156A1 (en) * | 2007-06-20 | 2009-01-15 | Jan Vetrovec | Thermal management system |
US20100281896A1 (en) * | 2009-04-26 | 2010-11-11 | Al Watban Alaa Abdulkareem | Evaporative Air Cooler With Multi Stages Cooling And Or Heating With Or Without Cooling Coil |
US20180231264A1 (en) * | 2017-02-08 | 2018-08-16 | Evapco, Inc. | Modulated water flow for once-through adiabatic cooling |
US20200141620A1 (en) * | 2018-11-06 | 2020-05-07 | Evapco, Inc. | Direct expansion evaporator with vapor ejector capacity boost |
-
2022
- 2022-12-19 AU AU2022409865A patent/AU2022409865A1/en active Pending
- 2022-12-19 CA CA3241166A patent/CA3241166A1/en active Pending
- 2022-12-19 WO PCT/US2022/081946 patent/WO2023115061A1/en active Application Filing
- 2022-12-19 US US18/068,238 patent/US20230213285A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4187695A (en) * | 1978-11-07 | 1980-02-12 | Virginia Chemicals Inc. | Air-conditioning system having recirculating and flow-control means |
US4612778A (en) * | 1985-02-14 | 1986-09-23 | Medrano Michael V | Precooler for an evaporative cooler |
US5007582A (en) * | 1989-11-14 | 1991-04-16 | Tlv Company, Limited | Reduced pressure steam heat treating device |
US20090014156A1 (en) * | 2007-06-20 | 2009-01-15 | Jan Vetrovec | Thermal management system |
US20100281896A1 (en) * | 2009-04-26 | 2010-11-11 | Al Watban Alaa Abdulkareem | Evaporative Air Cooler With Multi Stages Cooling And Or Heating With Or Without Cooling Coil |
US20180231264A1 (en) * | 2017-02-08 | 2018-08-16 | Evapco, Inc. | Modulated water flow for once-through adiabatic cooling |
US20200141620A1 (en) * | 2018-11-06 | 2020-05-07 | Evapco, Inc. | Direct expansion evaporator with vapor ejector capacity boost |
Also Published As
Publication number | Publication date |
---|---|
CA3241166A1 (en) | 2023-06-22 |
US20230213285A1 (en) | 2023-07-06 |
AU2022409865A1 (en) | 2024-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11596874B2 (en) | Water production, filtration and dispensing system | |
CN106662405B (en) | Combined convector | |
US9091485B2 (en) | Hybrid heat exchanger apparatus and method of operating the same | |
US20120324911A1 (en) | Dual-loop cooling system | |
US20180231264A1 (en) | Modulated water flow for once-through adiabatic cooling | |
CN211668307U (en) | Cooling tower with precooling apparatus | |
HU205989B (en) | Cooling system for condensating the dead steam of stema-turbine works particularly power-plants | |
CN105650927B (en) | Device | |
US20230213285A1 (en) | Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system | |
CN112960715A (en) | High-temperature sewage self-desalting multi-effect distillation equipment | |
EP3583998B1 (en) | Gas-water separation systems and methods | |
EP4098964B1 (en) | Cooling arrangement comprising a closed loop, a semi-open loop and at least one fan | |
KR20240124980A (en) | Non-electromechanical, pumpless liquid recirculation system for air-cooled condensers and chillers adiabatic precooling systems | |
US5084217A (en) | Apparatus and method for controlling the discharge or continuous bleed-off of the cooling water of evaporative coolers | |
CN118524942A (en) | Non-electromechanical pumpless liquid recirculation system for adiabatic pre-cooling systems for air cooled condensers and coolers | |
GB2230849A (en) | Air-cooled heat exchanger | |
US6644566B1 (en) | Water distribution conduit | |
US3759317A (en) | A heat exchanger | |
SU1688079A1 (en) | Oil separator | |
US1970296A (en) | Air conditioner | |
SU1314199A1 (en) | Device for heat and moisture treatment of air | |
RU2750513C1 (en) | Passive modular-type radiator | |
CN107099650A (en) | Quenching liquid enclosed cooling system | |
GB2027529A (en) | Improved method of evaporative cooling and device | |
JP3027682B2 (en) | Absorption chiller / heater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22908790 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022409865 Country of ref document: AU Ref document number: AU2022409865 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 3241166 Country of ref document: CA |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112024012022 Country of ref document: BR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022908790 Country of ref document: EP Ref document number: 2024116239 Country of ref document: RU |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022908790 Country of ref document: EP Effective date: 20240717 |