[go: up one dir, main page]

WO2011067570A2 - Poutre de réfrigération présentant un élément compressible et appareil de réfrigération comportant celle-ci - Google Patents

Poutre de réfrigération présentant un élément compressible et appareil de réfrigération comportant celle-ci Download PDF

Info

Publication number
WO2011067570A2
WO2011067570A2 PCT/GB2010/002220 GB2010002220W WO2011067570A2 WO 2011067570 A2 WO2011067570 A2 WO 2011067570A2 GB 2010002220 W GB2010002220 W GB 2010002220W WO 2011067570 A2 WO2011067570 A2 WO 2011067570A2
Authority
WO
WIPO (PCT)
Prior art keywords
refrigeration
outer casing
phase change
pipes
change material
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.)
Ceased
Application number
PCT/GB2010/002220
Other languages
English (en)
Other versions
WO2011067570A3 (fr
Inventor
Peter Maitland Jackson
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.)
Le Jackson (coachworks) Ltd
Original Assignee
Le Jackson (coachworks) 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 Le Jackson (coachworks) Ltd filed Critical Le Jackson (coachworks) Ltd
Publication of WO2011067570A2 publication Critical patent/WO2011067570A2/fr
Publication of WO2011067570A3 publication Critical patent/WO2011067570A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/005—Devices using other cold materials; Devices using cold-storage bodies combined with heat exchangers
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention relates to an improved refrigeration beam that can be used as part of a refrigeration apparatus to cool a space.
  • an elongate refrigeration beam is located in a space to be cooled.
  • the refrigeration beam typically has a hollow metal or plastic outer casing of rectangular cross-section with metal pipes for carrying a refrigerant gas (such as an HFC or a CFC/HCFC gas) running longitudinally through the interior.
  • a refrigerant gas such as an HFC or a CFC/HCFC gas
  • the space between the outer surface of the pipes and the inner surface of the outer casing is filled with a phase change material.
  • the phase change material is a freezing mixture that can be formed from a combination of non-toxic salts and organic compounds in an aqueous solution. It can be presented either as a liquid or converted to a gel by using one of a number of different proprietary gelling agents.
  • An electrically powered condensing unit is used to compress the refrigerant gas which is then passed through the pipes to lower the temperature of the phase change material. Once the temperature of the phase change material has been reduced to below its freezing point the liquid or gel is converted into a solid. Once the flow of refrigerant gas is stopped, the phase change material will eventually start to thaw and return back to a liquid or gel. The temperature of the phase change material will not alter during the change of state (due to the well known principle of latent heat) and the refrigeration beam will therefore remain at a low temperature for a certain period of time during which it will cool the space.
  • the condensing unit is mounted in the loading space of a transport vehicle, for example, then it is usual for the condensing unit to be operated during the night to reduce the temperature of the phase change material to below its freezing point. The refrigeration beam is then able to cool the loading space when the transport vehicle is used during the daytime.
  • a spaced array of refrigeration beams are mounted in the loading space and the metal pipes running longitudinally through the interior of each beam are connected together to form a closed piping network that is connected to the inlet and outlet of the condensing unit.
  • the present invention provides a refrigeration beam for use with a refrigeration apparatus, the refrigeration beam having an outer casing, a first pipe for carrying cooling fluid, a second pipe for carrying cooling fluid, and wherein the space between the outer surfaces of the first and second pipes and the inner surface of the outer casing contains a phase change material, wherein the outer casing includes a first arcuate section that is shaped to partly enclose a first substantially cylindrical volume and a second arcuate section that is shaped to partly enclose a second substantially cylindrical volume, wherein the first and second sections of the outer casing are joined together by arcuate intermediate sections that extend inwards to reduce the amount of space therebetween (and most preferably to minimise, as far as possible, the amount of space between the outer surfaces of the first and second pipes and the inner surface of the outer casing that lies outside the first and second substantially cylindrical volumes), wherein the first and second substantially cylindrical volumes are substantially tangent, wherein the first and second pipes are located substantially at a centre of the first and second substantially cylindrical volumes, respectively, and wherein the refrigeration beam
  • the phase change material will typically expand as it freezes.
  • the incorporation of a compressible strip within the space can therefore help to eliminate the risk of the refrigeration beam being damaged or fractured by the expansion as described further below.
  • the compressible strip can have any convenient size and shape and will typically be large enough to accommodate or absorb most, if not all, of the phase change material expansion.
  • the compressible strip is preferably supported at or near the centre of the refrigeration beam and typically extends along substantially the entire axial length of the refrigeration beam.
  • the compressible strip may be made of any suitable compressible, resilient material such as rubber, synthetic rubber or the like.
  • the compressible material must be chemically compatible with the phase change material in which it is immersed.
  • the present invention further provides a refrigeration apparatus comprising at least one refrigeration beam as described above, and a source of cooling fluid (optionally a refrigeration gas) connected to the first and second pipes.
  • the source of cooling fluid can be a condensing unit, for example.
  • the refrigeration beam will be located in a space to be cooled.
  • cooling fluid is passed through the first and second pipes to lower the temperature of the surrounding phase change material below its freezing point, including any margin for super-freezing. Any expansion of the phase change material is absorbed by the compressible strip to avoid any undue stresses being placed on the outer casing, for example. Once all of the phase change material inside the outer casing is frozen solid, the flow of cooling fluid can be stopped.
  • the intermediate sections of the outer casing are considered to be important to the operation of the refrigeration beam.
  • radial cooling occurs working outwardly from the outer surface of the pipes.
  • the radial cooling has frozen solid the phase change material within the first and second substantially cylindrical volumes and only the phase change material that lies in the space outside the first and second substantially cylindrical volumes remains in the liquid or gel state.
  • the refrigeration beam will only operate correctly if all of the phase change material is frozen solid.
  • the susceptibility of the refrigeration beam to complete freezing is therefore improved by minimising the space that lies outside the first and second substantially cylindrical volumes and this is achieved by the configuration of the intermediate sections of the outer casing which extend inwardly to reduce the space therebetween.
  • the configuration of the intermediate sections or the 'waisting' of the outer casing must not compromise the strength or rigidity of the refrigeration beam.
  • Positioning the strip of compressible material at or near to the centre of the refrigeration beam means that it undergoes compression at the critical time when substantially all of the phase change material in the first and second substantially cylindrical volumes is frozen solid and when only the phase change material in the space between the intermediate sections of the outer casing remains in the liquid or gel state.
  • the 'waisting' of the outer casing that is provided by the intermediate sections means that the refrigeration beam is at its narrowest at the point where the compressible strip is located and where it would otherwise suffer significant stresses as the final part of the phase change material expands as it freezes solid.
  • the addition of the compressible strip therefore allows the refrigeration beam to maximise the technical benefit that comes from minimising the amount of space that lies outside the first and second substantially cylindrical volumes and results in a refrigeration beam that provides significantly better cooling performance while maintaining its strength and rigidity.
  • the phase change material is a freezing mixture that can be formed from a combination of non-toxic salts and organic compounds in an aqueous solution. Before being cooled to below its freezing point, the phase change material can be a liquid but in some cases improved results have been obtained using a gel.
  • first and second volumes are most preferably perfectly cylindrical such that they receive uniform radial cooling from cooling fluid passing through the first and second pipes, which are centrally located within the first and second volumes, respectively, it will be readily appreciated that the benefits of the present invention can still be realised if the first and second volumes are a reasonable deviation from perfectly cylindrical, or if the first and second pipes are not perfectly located at the centre of the first and second volumes.
  • the cross-section of the first arcuate section preferably defines the arc of a first circle having a centre and a first radius and more uniform freezing of the phase change material in the first volume can be obtained if the first pipe is located substantially at the centre of the first circle.
  • the cross-section of the second arcuate section preferably defines the arc of a second circle having a centre and a first radius and more uniform freezing of the phase change material in the second volume can be obtained if the second pipe is located substantially at the centre of the second circle.
  • the first and second pipes are preferably substantially parallel to each other and to a longitudinal axis of the outer casing along at least a significant proportion of the total length of the refrigeration beam. It will be readily appreciated that the first and second pipes may be two separate pipes connected independently to a source of cooling fluid. However, it is generally preferred that the so-called first and second pipes are in fact extensions of a single pipe that passes through the one of the volumes of the outer casing before being reversed so that it passes through the other one of the volumes of the outer casing.
  • Figure 1 is a cross-section through a refrigeration beam according to the present invention.
  • a refrigeration beam includes a metal or plastics outer casing 2 having two distinct rounded sections or 'lobes' 2a and 2b that are joined together by rounded intermediate sections 2c. When considered along the length of the refrigeration beam, each of the sections 2a and 2b partly encloses and defines a substantially cylindrical volume 4a and 4b.
  • the section 2a is formed to follow an arc of a first circle and the section 2b is formed to follow an arc of a second circle.
  • the first and second circles are tangent to each other so that the distance between their centres is equal to the sum of the radius Ri of the first circle and the radius R 2 of the second circle.
  • a first pipe 6 for carrying refrigerant gas supplied by a condensing unit (not shown) is located in the cylindrical volume 4a at the centre of the first circle.
  • a second pipe 8 for carrying refrigerant gas supplied by the same or a different condensing unit (not shown) is located in the cylindrical volume 4b at the centre of the second circle.
  • the first and second pipes 6, 8 are therefore positioned parallel to each other and to a longitudinal axis of the outer casing 2 along the length of the refrigeration beam.
  • phase change material such as a combination of non-toxic salts and organic compounds in an aqueous solution.
  • Compressed refrigerant gas is passed through the first and second pipes 6, 8 from the condensing unit (not shown).
  • the first and second pipes 6, 8 have good thermal conductivity and by a process of conduction they lower the temperature of the phase change material working radially outwards from the outer surfaces of the pipes.
  • the refrigeration beam of the present invention provides a much more uniform freezing of the phase change material as compared to a conventional refrigeration beam.
  • Forming the outer casing 2 with two distinct rounded sections 2a and 2b and a 'waisted' part defined by the intermediate sections 2c has the additional beneficial effect of increasing the surface area of the refrigeration beam that is available for cooling as well as minimising the space that lies outside the first and second cylindrical volumes 4a and 4b.
  • a strip 10 of compressible, resilient material such as rubber is supported at the centre of the refrigeration beam.
  • the strip 10 extends along substantially the entire axial length of the refrigeration beam. Positioning the strip 10 at the centre of the refrigeration beam means that it is at the meeting point of the two cooling zones which originate at the first and second pipes 6, 8 and can undergo compression at the critical time when substantially all of the phase change material in the cylindrical volumes 4a and 4b is frozen and only the phase change material in the intervening regions adjacent the strip 10 remains in the liquid or gel state.
  • the refrigeration beam is also at its narrowest at this point and may suffer significant stresses as the phase change material expands. These stresses are substantially eliminated by the addition of the strip 10 which is compressed as the surrounding phase change material expands as it freezes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

La présente invention concerne une poutre de réfrigération destinée à être utilisée avec un appareil de réfrigération. La poutre de réfrigération comprend un boîtier externe (2) qui contient un matériau à changement de phase et comprend des sections intermédiaires arquées (2c) qui s'étendent vers l'intérieur pour réduire la quantité d'espace entre elles. Une bande compressible (10) est située au niveau d'un centre de la poutre de réfrigération pour loger une quelconque expansion du matériau à changement de phase et empêcher la dégradation du boîtier externe (2).
PCT/GB2010/002220 2009-12-04 2010-12-03 Poutre de réfrigération présentant un élément compressible et appareil de réfrigération comportant celle-ci Ceased WO2011067570A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0921235A GB2475882B (en) 2009-12-04 2009-12-04 Refrigeration beam with a compressible member and refrigeration apparatus incorporating the same
GB0921235.8 2009-12-04

Publications (2)

Publication Number Publication Date
WO2011067570A2 true WO2011067570A2 (fr) 2011-06-09
WO2011067570A3 WO2011067570A3 (fr) 2011-12-15

Family

ID=41641912

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2010/002220 Ceased WO2011067570A2 (fr) 2009-12-04 2010-12-03 Poutre de réfrigération présentant un élément compressible et appareil de réfrigération comportant celle-ci

Country Status (2)

Country Link
GB (1) GB2475882B (fr)
WO (1) WO2011067570A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925822A (zh) * 2014-05-05 2014-07-16 哈尔滨工业大学 一种基于相变储热材料的热交换装置及其封装方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2513901A (en) * 2013-05-10 2014-11-12 L E Jackson Coachworks Ltd Housings for refrigeration beams
NL2011076C2 (en) * 2013-07-01 2015-01-05 Njord Holding B V Refrigerated storage compartment or container, and truck, van, trailer or storage system having such refrigerated storage compartment/container as a part thereof.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1834009A (en) * 1928-02-23 1931-12-01 James A Tillinghast Refrigerating system
FR2702270B1 (fr) * 1993-03-05 1995-04-28 Andre Churi Elément réfrigérant, notamment pour conteneurs mobiles.
JPH11294918A (ja) * 1998-04-06 1999-10-29 Zexel:Kk 蓄冷装置
ITTO20030415A1 (it) * 2003-06-04 2004-12-05 Cold Car S R L Accumulatore di frigorie
GB2432411B (en) * 2005-11-16 2011-02-16 L E Jackson Refrigeration beam and refrigeration apparatus incorporating the same
KR100888760B1 (ko) * 2007-08-23 2009-03-17 주식회사 이에스티 잠열재를 이용한 열교환모듈

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925822A (zh) * 2014-05-05 2014-07-16 哈尔滨工业大学 一种基于相变储热材料的热交换装置及其封装方法

Also Published As

Publication number Publication date
WO2011067570A3 (fr) 2011-12-15
GB2475882B (en) 2011-11-30
GB0921235D0 (en) 2010-01-20
GB2475882A (en) 2011-06-08

Similar Documents

Publication Publication Date Title
US20110214847A1 (en) Double pipe and heat exchanger having the same
US8505316B2 (en) Direct expansion evaporator
EP2677252B1 (fr) Réfrigérateur
CN102080903A (zh) 冷冻装置
US8534086B2 (en) Direct expansion evaporator
WO2011067570A2 (fr) Poutre de réfrigération présentant un élément compressible et appareil de réfrigération comportant celle-ci
CN202734633U (zh) 混合式冷藏系统
CN102914047B (zh) 空气源热泵热水器
US20200217572A1 (en) Ice maker
CN205227902U (zh) 一种二氧化碳载冷剂制冷机组
CN1074524C (zh) 蓄冷式不间断工作蒸发器
CN106461286A (zh) 超低温冷冻库
CN203177685U (zh) 内置油冷却器的冷凝器
CN109724190A (zh) 空调器
KR101049696B1 (ko) 히트펌프의 액열기
KR20120087646A (ko) 냉온수기의 냉수통 구조
CN204763185U (zh) 低温速冻冰棍机
GB2432411A (en) Refrigeration beam
CN209696954U (zh) 用于试验箱制冷系统内铜细管的冷却装置
EP2626657B1 (fr) Évaporateur à détente directe
CN205669900U (zh) 一种制冷设备的蒸发器安装结构
KR101939048B1 (ko) 2중관형 해수 샤베트 아이스 제조장치
KR100193437B1 (ko) 드라이어에 중간냉각기가 부착된 공기조화기의 냉동사이클
WO2016011090A1 (fr) Évaporateur avec échange de chaleur
CN105508242A (zh) 回转式压缩机及具有其的制冷循环装置

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: 10801197

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10801197

Country of ref document: EP

Kind code of ref document: A2