EP1146307A2 - Wärmetauscher - Google Patents

Wärmetauscher Download PDF

Info

Publication number
EP1146307A2
EP1146307A2 EP01303404A EP01303404A EP1146307A2 EP 1146307 A2 EP1146307 A2 EP 1146307A2 EP 01303404 A EP01303404 A EP 01303404A EP 01303404 A EP01303404 A EP 01303404A EP 1146307 A2 EP1146307 A2 EP 1146307A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
heat exchange
heat
fluid
fins
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.)
Withdrawn
Application number
EP01303404A
Other languages
English (en)
French (fr)
Other versions
EP1146307A3 (de
Inventor
Roy Bratley
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.)
CARADON IDEAL Ltd
Original Assignee
CARADON IDEAL 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 CARADON IDEAL Ltd filed Critical CARADON IDEAL Ltd
Publication of EP1146307A2 publication Critical patent/EP1146307A2/de
Publication of EP1146307A3 publication Critical patent/EP1146307A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media

Definitions

  • This invention relates to heat exchangers, and particularly to heat exchangers cast in one piece, i.e. monoblock heat exchangers.
  • the invention is mainly concerned with heat exchangers for domestic gas boilers.
  • a known form of heat exchanger has upright passages for the flow of hot gases from a gas burner.
  • the passages are in heat exchange relationship with one or more horizontal conduits through which flows a fluid to be heated.
  • a plurality of parallel heat exchanger fins are located in the passages and extend longitudinally from opposed walls of the passages to increase the efficiency of the heat exchange between the gases and the fluid.
  • the present invention aims to improve the efficiency of known cast heat exchangers, and it provides a cast monoblock heat exchanger comprising a body having at least one primary passageway for the flow of a gaseous heat exchange medium, at least one conduit for the passage of a fluid to be heated by the heat exchange with the gaseous medium between an inlet port and an associated outlet port and a plurality of generally parallel heat exchange fins spanning the gap between opposed walls of the primary passageway.
  • the fin arrangement of the invention maximises the fin surface area, and thereby provides an improvement in heat exchanger efficiency.
  • the interlinking of the fins also increases the structural rigidity of the heat exchanger and improves the transfer of stresses caused by the expansion and contraction of the heat exchanger during use. Further, as the heat exchange fins span the gap between opposed walls of the primary passageway heat can be transferred between opposed passageway walls to reduce thermal stress imposed by temperature imbalances across the body of the heat exchanger.
  • the heat exchange fins define an array of mutually isolated minor passageways.
  • the present invention also encompasses a gas boiler having a cast monoblock heat exchanger as described above.
  • the heat exchanger 1 is cast in one piece from iron, aluminium or any other suitable material.
  • the cast heat exchanger has one or more pairs of inlet and outlet ports 2,3 and defines between associated ports a serpentine-like path for the passage of the fluid to be heated.
  • Three parallel flueways 4 extend through the heat exchanger 1. Hot combustion gases from a gas burner (not shown) pass through the flueways 4, which are generally rectangular with an elongate cross-section. Heat exchange fins 5 extend in general parallelism between the major faces 6a,b of the flueways to bridge the gap between the major faces and to define an array of discrete generally rectangular minor flueways disposed at right angles to the major flueways 4. As shown in the right hand half of Figure 1, alternative fins are tapered below the level of fin interconnection.
  • the inter-fin spaces are generally in the region of 1.8 mm and 4.0 mm.
  • the available heat exchange area is maximised by the arrangement described above.
  • the fluid to be heated passes from an inlet port 2 to the associated outlet port 3 its temperature is gradually increased through heat exchange with the hot combustion gases from the gas burner.
  • the fluid temperature varies from a minimum at the inlet port 2 to a maximum at the associated outlet port 3, and the variation in temperature along the serpentine-like path through the heat exchanger can result in the fluid temperature in the conduit on one side of a flueway being a significantly different temperature from the fluid in the conduit on the other side of the flueway.
  • a significant variation in temperature across a flueway can result.
  • the thermal stresses on the one-piece casting that result from this temperature variation are reduced or minimised by the heat exchange fins 4 which span the gap between the major faces 6a,b of the flueway 4 to heat transfer therebetween.
  • the additional area of the heat exchange fins according to the invention is shaded in the drawings.
  • the fins 5 bridge the gap between the major faces 6a,b of the flueways 4 in the upper half of the heat exchanger, with the end of each fin in the lower half closely confronting the end of the complementary opposite fin. A greater area of the fins could be joined.

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)
EP01303404A 2000-04-14 2001-04-11 Wärmetauscher Withdrawn EP1146307A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0009380 2000-04-14
GB0009380A GB0009380D0 (en) 2000-04-14 2000-04-14 Heat exchanger

Publications (2)

Publication Number Publication Date
EP1146307A2 true EP1146307A2 (de) 2001-10-17
EP1146307A3 EP1146307A3 (de) 2004-01-21

Family

ID=9890018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01303404A Withdrawn EP1146307A3 (de) 2000-04-14 2001-04-11 Wärmetauscher

Country Status (2)

Country Link
EP (1) EP1146307A3 (de)
GB (1) GB0009380D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20100636A1 (it) * 2010-10-21 2012-04-22 Gas Point S R L Scambiatore di calore, in particolare per caldaie a condensazione

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000268A (en) * 1977-06-09 1979-01-04 Ass Eng Ltd Improvements in or relating to heat exchangers
DE19809859A1 (de) * 1998-03-07 1999-09-09 Mann & Hummel Filter Vorrichtung zur Kühlung von Gasen
NL1009225C1 (nl) * 1998-05-20 1999-11-24 Brabant Alucast Products B V Warmtewisselaar.
EP0971179A1 (de) * 1998-07-06 2000-01-12 Holding J.H. Deckers N.V. Wärmetauscher und Heizgerät mit verbessertem Wirkungsgrad

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000268A (en) * 1977-06-09 1979-01-04 Ass Eng Ltd Improvements in or relating to heat exchangers
DE19809859A1 (de) * 1998-03-07 1999-09-09 Mann & Hummel Filter Vorrichtung zur Kühlung von Gasen
NL1009225C1 (nl) * 1998-05-20 1999-11-24 Brabant Alucast Products B V Warmtewisselaar.
EP0971179A1 (de) * 1998-07-06 2000-01-12 Holding J.H. Deckers N.V. Wärmetauscher und Heizgerät mit verbessertem Wirkungsgrad

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20100636A1 (it) * 2010-10-21 2012-04-22 Gas Point S R L Scambiatore di calore, in particolare per caldaie a condensazione
WO2012052977A3 (en) * 2010-10-21 2012-06-21 Gas Point S.R.L. Heat exchanger, in particular for condensing boilers

Also Published As

Publication number Publication date
EP1146307A3 (de) 2004-01-21
GB0009380D0 (en) 2000-05-31

Similar Documents

Publication Publication Date Title
KR100645734B1 (ko) 난방/온수 겸용 콘덴싱 보일러의 열교환기
AU2010239899B2 (en) Heat exchanger
EP2160560B1 (de) Wärmetauscher für heizkessel
EP1872062B1 (de) Wärmetauscher für wandmontierten kondensatorkessel
EP2140208B1 (de) Wärmetauscher
GB1277872A (en) Improvements in and relating to heat exchangers
EP0085470B1 (de) Kessel mit Rauchgaskondensation
RU2511803C2 (ru) Секционный отопительный котел из чугуна или алюминия
RU2495336C2 (ru) Секционный отопительный котел из чугуна или алюминия
DE69923100D1 (de) Kessel
EP1146307A2 (de) Wärmetauscher
KR100473083B1 (ko) 콘덴싱보일러의 열교환기
KR960024210A (ko) 저탕식 가스보일러의 적층형 열교환기
EP1826520A2 (de) Wärmetauschelement und Wärmetauscher mit diesem Element
US2535047A (en) Air preheater for steam generating plants
RU2127853C1 (ru) Установка для водяного отопления и/или горячего водоснабжения
US6763786B2 (en) Equipment for water heater
CN210292336U (zh) 新型燃气锅炉用肋柱型硅铝合金热交换器
KR20060006159A (ko) 보일러용 평판형 연관
RU2199702C2 (ru) Теплообменник
SU941781A1 (ru) Конвективна поверхность теплообмена
KR200362832Y1 (ko) 콘덴싱보일러의 열교환기
SU1232915A1 (ru) Рекуператор дл нагревательных и термических печей
KR101692349B1 (ko) 바디 유닛 및 그 바디를 포함하는 열교환기
KR20030029206A (ko) 콘덴싱보일러의 열교환기

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030501