WO2026025822A1 - Dispositif d'échange de chaleur antigel - Google Patents

Dispositif d'échange de chaleur antigel

Info

Publication number
WO2026025822A1
WO2026025822A1 PCT/CN2025/071769 CN2025071769W WO2026025822A1 WO 2026025822 A1 WO2026025822 A1 WO 2026025822A1 CN 2025071769 W CN2025071769 W CN 2025071769W WO 2026025822 A1 WO2026025822 A1 WO 2026025822A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
medium
heat exchange
exchange device
side plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/071769
Other languages
English (en)
Chinese (zh)
Inventor
赵博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY Co Ltd
Original Assignee
HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY Co Ltd filed Critical HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY Co Ltd
Publication of WO2026025822A1 publication Critical patent/WO2026025822A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding

Definitions

  • This application relates to the field of heat exchange technology, specifically to an antifreeze heat exchange device.
  • the technical problem to be solved by this application is to overcome the defects of wall frost and hot-side freezing in the process of using printed circuit board heat exchangers to exchange heat with liquefied natural gas, which seriously restrict the efficient and continuous operation of printed circuit board heat exchangers.
  • an antifreeze heat exchange device comprising:
  • the cold side plate has a first channel in which a first medium flows; during the process of the first medium flowing from the input end to the output end of the first channel, the first medium changes from a liquid state to a gaseous state.
  • An intermediate plate is attached to one side of the cold side plate.
  • the intermediate plate has a second channel, which is connected to the output end of the first channel through a connecting hole, so as to fill all or part of the gaseous first medium in the first channel into the second channel.
  • a hot side plate is attached to the other side of the middle plate.
  • a third channel is provided on the hot side plate, and a second medium flows in the third channel.
  • the temperature of the liquid first medium is lower than the freezing point of the second medium.
  • the temperature of the first medium that has absorbed heat and vaporized is higher than the freezing point of the second medium.
  • another intermediate plate through which a gaseous first medium flows is symmetrically attached to the other side of the cold side plate; and a hot side plate through which a second medium flows is symmetrically attached to the outside of the other intermediate plate.
  • the input end of the second channel is connected to the output end of the first channel, and the output end of the second channel is adapted to output the first medium in its entirety in gaseous state.
  • a portion of the gaseous first medium in the first channel is filled into the second channel, and the remaining gaseous first medium in the first channel is output from the output end of the first channel.
  • the first medium is natural gas.
  • the second medium is an aqueous solution of ethylene glycol.
  • the first channel, the second channel, and the third channel are all microchannels.
  • the antifreeze heat exchange device is a printed circuit board type heat exchanger.
  • the microchannels are fabricated by brazing or diffusion welding.
  • the microchannels of the first channel, the second channel, and the third channel are multiple parallel microchannels.
  • the antifreeze heat exchange device includes: a cold side plate with a first channel in which a first medium flows; during the process of the first medium flowing from the input end to the output end of the first channel, the first medium changes from a liquid state to a gaseous state; an intermediate plate attached to one side of the cold side plate, with a second channel in the intermediate plate, the second channel being connected to the output end of the first channel through a connecting hole to fill all or part of the gaseous first medium in the first channel into the second channel; and a hot side plate attached to the other side of the intermediate plate, with a third channel in the hot side plate in which a second medium flows; the temperature of the liquid first medium is lower than the freezing point of the second medium; the temperature of the first medium that has absorbed heat and vaporized is higher than the freezing point of the second medium; the present application adopts the above technical solution, forming a buffer layer through the intermediate plate to protect the hot side plate, preventing direct heat transfer between the cold and hot sides, preventing the second medium in
  • PCB printed circuit board
  • another intermediate plate through which a gaseous first medium flows is symmetrically attached to the other side of the cold side plate; and a hot side plate through which a second medium flows is symmetrically attached to the outside of the other intermediate plate.
  • the intermediate plate and the hot side plate form a longitudinal wrapping structure, which can make the flow rate and temperature distribution more uniform and achieve the purpose of antifreeze; it has a better internal heat exchange effect, avoids freezing caused by uneven local temperature, and improves heat exchange efficiency.
  • the second medium in this application is an aqueous solution of ethylene glycol; this application adopts the above technical solution to prevent the aqueous solution of ethylene glycol in the hot side plate from freezing, and further prevents the aqueous solution of ethylene glycol in the LNG heat exchanger in the prior art from freezing, which would lead to the failure of the heat exchanger.
  • microchannels of the first channel, the second channel and the third channel of this application are multiple parallel microchannels; the above technical solution is adopted in this application to further improve the heat exchange efficiency.
  • Figure 1 is a schematic diagram of the antifreeze heat exchange device provided in the embodiment of this application.
  • FIG. 2 is a schematic diagram of the antifreeze heat exchange device provided in the embodiment of this application.
  • FIG. 3 is a schematic diagram of the antifreeze heat exchange device provided in the embodiments of this application.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components.
  • One specific embodiment of the antifreeze heat exchange device shown in Figures 1 to 3 includes: a cold side plate 1, an intermediate plate 2, and a hot side plate 3.
  • the antifreeze heat exchange device described in this application is widely used in low-temperature heat exchange applications such as petrochemicals and shipbuilding.
  • the cold-side plate 1 has a first channel through which a first medium flows. During the flow of the first medium from the input end to the output end of the first channel, the first medium changes from a liquid state to a gaseous state.
  • One side of the intermediate plate 2 is attached to one side of the cold-side plate 1.
  • the intermediate plate 2 has a second channel, which is connected to the output end of the first channel through a connecting hole, allowing all or part of the gaseous first medium in the first channel to be filled into the second channel.
  • the arrows in Figures 1 and 3 indicate the flow direction of the first or second medium.
  • the first medium is natural gas
  • the second medium is an aqueous solution of ethylene glycol.
  • the antifreeze heat exchange device is a printed circuit board heat exchanger.
  • the hot side plate 3 is attached to the other side of the middle plate 2.
  • the hot side plate 3 is provided with a third channel, in which a second medium flows.
  • the temperature of the liquid first medium is lower than the freezing point of the second medium.
  • the temperature of the first medium that has absorbed heat and vaporized is higher than the freezing point of the second medium.
  • another intermediate plate 2 through which a gaseous first medium flows, is symmetrically attached to the other side of the cold side plate 1; and a hot side plate 3, through which a second medium flows, is symmetrically attached to the outside of the other intermediate plate 2.
  • a portion of the gaseous first medium in the first channel is filled into the second channel, and the remaining gaseous first medium in the first channel is output from the output end of the first channel.
  • Liquid cryogenic natural gas enters from the input end of the first channel of the cold side plate 1, continuously exchanging heat along the first channel to the connecting hole.
  • a small portion of the medium-temperature natural gas formed after vaporization enters the intermediate plate 2 adjacent to both sides along the connecting hole, forming medium-temperature gaseous natural gas.
  • This creates a temperature buffer layer between the high-temperature and low-temperature media, thereby reducing the temperature difference between the hot and cold sides and achieving an antifreeze effect.
  • the hot side of this structure constantly exchanges heat with the medium-temperature gaseous natural gas, minimizing the impact on the structure's heat exchange efficiency. The remaining gaseous natural gas flows out of the first channel.
  • the intermediate plate 2 continuously exchanges heat with the hot side plate 3, and the cold side plate 1 continuously exchanges heat with the intermediate plate 2, ultimately completing the heat exchange.
  • the antifreeze principle is briefly described as follows: When the ethylene glycol aqueous solution flows, heat is transferred to the medium-temperature gaseous natural gas. Simultaneously, the medium-temperature gaseous natural gas also constantly exchanges heat with the cryogenic liquid natural gas. At this time, the intermediate plate 2 acts as a temperature buffer layer, avoiding direct contact between the hot side and the cold side, thereby achieving antifreeze on the hot side through the intermediate plate 2.
  • the input end of the second channel is connected to the output end of the first channel, and the output end of the second channel is suitable for outputting all gaseous first medium.
  • the gaseous natural gas enters the intermediate plates 2 on both sides.
  • the intermediate plates 2 exchange heat with the hot side plate 3 and the cold side plate 1 simultaneously.
  • the ultra-low temperature liquefied natural gas flows through the cold side plate 1, it exchanges heat with the medium temperature gaseous natural gas flowing through the intermediate plate 2. Therefore, when all the low temperature natural gas enters the intermediate plate 2, it has already begun to heat up and vaporize.
  • the temperature gradient when the high temperature ethylene glycol aqueous solution exchanges heat with the medium temperature gaseous natural gas in the intermediate plate 2 is small, thereby achieving the purpose of antifreeze. Since the heat of the hot side plate 3 is always exchanging heat with the gaseous natural gas, the heat exchange efficiency of this structure is minimally affected. Furthermore, after the low temperature liquefied natural gas flows through the connecting hole of the cold side plate 1, it flows into the intermediate plates 2 on both sides. At this time, the first medium undergoes mixing, collision, and redistribution at the connecting hole, making the flow rate and temperature distribution more uniform.
  • the first, second, and third channels are all microchannels; these microchannels are fabricated using brazing or diffusion welding; each of the first, second, and third channels consists of multiple parallel microchannels.
  • the microchannels described in this application can be formed in one step through diffusion welding or brazing using laminated plates. There are no internal welding points, so any leakage is readily apparent, preventing media cross-contamination caused by leakage from the intermediate plate 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne un dispositif d'échange de chaleur antigel, comprenant : une plaque côté froid (1) pourvue d'un premier canal à travers lequel s'écoule un premier milieu, le premier milieu étant modifié, pendant le processus d'écoulement d'une extrémité d'entrée à une extrémité de sortie, depuis un état liquide vers un état gazeux ; des plaques intermédiaires (2), dont un côté est fixé à un côté de la plaque côté froid (1), les plaques intermédiaires (2) étant pourvues de deuxièmes canaux, qui sont en communication avec l'extrémité de sortie du premier canal par l'intermédiaire de trous de communication afin de remplir tout ou partie du premier milieu gazeux du premier canal dans les deuxièmes canaux ; et des plaques côté chaud (3), qui sont fixées aux autres côtés des plaques intermédiaires (2) et sont pourvues de troisièmes canaux à travers lesquels s'écoule un second milieu. Les plaques intermédiaires (2) forment des couches tampons permettant de protéger les plaques côté chaud (3), ce qui permet d'empêcher un transfert de chaleur direct entre des côtés chaud et froid, et d'empêcher le gel du second milieu à l'intérieur des plaques côté chaud (3) ; de plus, les seconds canaux ne reposent pas sur un milieu supplémentaire, ce qui permet d'éliminer le problème de contamination provoquée par des fuites et un mélange inter-cavités, et de réduire les coûts.
PCT/CN2025/071769 2024-07-30 2025-01-10 Dispositif d'échange de chaleur antigel Pending WO2026025822A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202411027911.3 2024-07-30
CN202411027911.3A CN118548726B (zh) 2024-07-30 2024-07-30 一种防冻换热装置

Publications (1)

Publication Number Publication Date
WO2026025822A1 true WO2026025822A1 (fr) 2026-02-05

Family

ID=92446794

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2025/071769 Pending WO2026025822A1 (fr) 2024-07-30 2025-01-10 Dispositif d'échange de chaleur antigel

Country Status (2)

Country Link
CN (1) CN118548726B (fr)
WO (1) WO2026025822A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118548726B (zh) * 2024-07-30 2024-10-29 杭州沈氏节能科技股份有限公司 一种防冻换热装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03286990A (ja) * 1990-03-30 1991-12-17 Tokyo Gas Co Ltd 二重管式オープンラック型気化装置
JPH07159061A (ja) * 1993-12-02 1995-06-20 Tokyo Gas Co Ltd 二重管式オープンラック型気化装置
JPH1151578A (ja) * 1997-07-28 1999-02-26 Kobe Steel Ltd プレートフィン熱交換器
CN105102800A (zh) * 2012-11-22 2015-11-25 阿法拉伐科尔赫斯有限公司 3-d通路气体热交换器
JP2016180552A (ja) * 2015-03-24 2016-10-13 住友精密工業株式会社 熱交換器および液化ガス蒸発器
JP2023038073A (ja) * 2021-09-06 2023-03-16 ドンファ エンテク シーオー．，エルティーディー アイシング防止及び除去が容易なプリント回路基板型熱交換器
CN115876022A (zh) * 2022-11-25 2023-03-31 杭州沈氏节能科技股份有限公司 一种换热芯体及lng汽化器
CN118548726A (zh) * 2024-07-30 2024-08-27 杭州沈氏节能科技股份有限公司 一种防冻换热装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102135051B (zh) * 2011-01-25 2012-07-25 西安交通大学 一种用于液化天然气汽车空调的无冻结换热器
CN204064064U (zh) * 2014-08-28 2014-12-31 华南理工大学 一种防冻结的lng换热装置
JP6757150B2 (ja) * 2016-03-17 2020-09-16 株式会社神戸製鋼所 積層型流体加温器及び積層型流体加温器による流体の加温方法
KR102589465B1 (ko) * 2018-11-01 2023-10-16 한화오션 주식회사 극저온 액화가스용 기화기

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03286990A (ja) * 1990-03-30 1991-12-17 Tokyo Gas Co Ltd 二重管式オープンラック型気化装置
JPH07159061A (ja) * 1993-12-02 1995-06-20 Tokyo Gas Co Ltd 二重管式オープンラック型気化装置
JPH1151578A (ja) * 1997-07-28 1999-02-26 Kobe Steel Ltd プレートフィン熱交換器
CN105102800A (zh) * 2012-11-22 2015-11-25 阿法拉伐科尔赫斯有限公司 3-d通路气体热交换器
JP2016180552A (ja) * 2015-03-24 2016-10-13 住友精密工業株式会社 熱交換器および液化ガス蒸発器
JP2023038073A (ja) * 2021-09-06 2023-03-16 ドンファ エンテク シーオー．，エルティーディー アイシング防止及び除去が容易なプリント回路基板型熱交換器
CN115876022A (zh) * 2022-11-25 2023-03-31 杭州沈氏节能科技股份有限公司 一种换热芯体及lng汽化器
CN118548726A (zh) * 2024-07-30 2024-08-27 杭州沈氏节能科技股份有限公司 一种防冻换热装置

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