EP0672235A1 - Heat exchanger of the desk type - Google Patents
Heat exchanger of the desk typeInfo
- Publication number
- EP0672235A1 EP0672235A1 EP94929456A EP94929456A EP0672235A1 EP 0672235 A1 EP0672235 A1 EP 0672235A1 EP 94929456 A EP94929456 A EP 94929456A EP 94929456 A EP94929456 A EP 94929456A EP 0672235 A1 EP0672235 A1 EP 0672235A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- end panels
- heat exchanger
- spacer
- tie rods
- 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- Withdrawn
Links
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
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
- F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart
-
- 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
- F28D9/0062—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 for one heat-exchange medium being formed by spaced plates with inserted elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
- F28F2250/104—Particular pattern of flow of the heat exchange media with parallel flow
Definitions
- the invention relates to a heat exchanger of the desk type, having a core made of planparallelly and mutually in distance arranged plates, defining passages for heat exchanging fluids, the core being compressed between end panels by means of tie rods.
- Heat exchangers of the known construction have a core consisting of plates compressed between rigid end panels by means of tie rods fixing their position and a rigidity of the whole assembly. Individual adjacent plates are mutually separated by spacing elements of various shapes, the elements defining pluralities of parallelly arranged channels for which it applies that channels in one layer are perpendicular to the channels in adjoining layers. Such embodiments with end panels in direct contact with the plate core are satisfactory for low temperature applications showing only low level of
- a heat exchanger of the desk type having a core made of planparallelly and mutually in distance arranged plates, defining passages for heat exchanging fluids, the core being compressed between end panels by means of tie rods in an embodiment in accordance with the present invention comprising spacers filled with insulation, the spacer being arranged between the core and each of the end panels.
- the end panels are sprung away from the core, advantageously by means of elastic elements located between the end panels and the spacers and/or located on the tie rods.
- the spacer comprises a plurality of crossbars and in a preferred embodiment the the spacer is of a honeycomb construction.
- the spacer further provides for uniform distribution of the temperature gradient between the core and the end panel. It results in negligible temperature difference between- the spacer and the adjoining core plate and the end plate respectively, which practically eliminates friction and fretting at contact surfaces of these parts. It is a further object of the invention to achieve a uniform distribution of compressiwe forces applied upon the core by the end panels which results in lower mechanical stress of tie rods and the core as well.
- FIG. 1 illustrates completely assembled heat exchanger.
- Fig. 2 shows the same in partially dismantled setup
- Fig- 3 presents particular parts of the heat exchanger
- Fig. 4 offers details of the core according to the Fig. 3-
- the heat exchanger similarly to those already existing ones, comprises plate core 1, which is compressed between two end panels 2 by means of tie rods.
- the tie rods are provided for by bolts 3 passing through sleeves 4 which are distributed along end panel 2 edges.
- the position of end plates 2 and pressure applied by them upon the core 1 are secured by nuts 5-
- Each end panel 2 is on its outside surface provided with crossbars 6-
- the core 1 consists of flat plates 7, arranged in a planparallel layout and mutually separated by spacing elements 8 being set apart at regular intervals.
- the spacing elements 8 define intermediate space between adjoining plates 7, thus allowing for flow of heat-exchanging fluids and preventing excessive mechanical stress and the plate 7 deformation.
- the edge bars 9 located along the plate 7 edges are well sealed against the adjoining plates 7, advantageously by welds, thus providing for enclosure of the inner core 1 space.
- Distribution heads 14 provide for particular inlets and outlets of heat-exchanging fluids into and out of the intermediate spaces of the core 1 plates 7.
- spacers IO which are of a honeycomb construction. The said spacers IO are placed between the core 1 and respective end plates 2.
- Space between spacing bars 11 of the spacers IO is filled with thermal insulation 12-
- the spacers IO allow for uniform distribution of pressure forces applied upon the core 1 by the end panels 2 and for uniform distribution of a thermal gradient showing maximum values at the core 1 surface and minimum val es at the outer surface of the end panels 2.
- the temperature of the spacers IO and the core 1 in their contact area is nearly the same for both elements and their thermal expansion being virtually equal is thus accompanied by very little or no friction. This applies similarly for the spacers IO and the end panels 2.
- Uniform temperature gradient existing across the spacer IO provides for low thermal and mechanical stress not only of these parts but also of adjoining core 1 and the end plate 2.
- the core 1 can be sprung away from the end panels 2 also by resilient elements placed between the end panels 2 and the spacer IO- Bolts 3 or any similar tying rods can be attached to end panels 2 also by means of welding.
- the present invention is designed for any application of heat exchangers operating at high temperatures and pressures-
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)
Abstract
For applications operating at high temperatures and pressures there is designed a heat exchanger comprising a core (1) made of plan parallely and mutually in distance arranged plates (7), defining passages for heat exchanging fluids, the core (1) being compressed between end panels (2) by tie rods. The heat exchanger further comprises a spacer (10) filled with insulation (12) and arranged between the core (1) and each of the end panels (2). The end panels (2) are sprung away from the core (1) by resilient elements located between the end panels (2) and the spacers (10) and/or located on the tie rods (3).
Description
HEAT EXCHANGER OF THE DESK TYPE
Technical Field
The invention relates to a heat exchanger of the desk type, having a core made of planparallelly and mutually in distance arranged plates, defining passages for heat exchanging fluids, the core being compressed between end panels by means of tie rods.
Background of the Invention
Heat exchangers of the known construction have a core consisting of plates compressed between rigid end panels by means of tie rods fixing their position and a rigidity of the whole assembly. Individual adjacent plates are mutually separated by spacing elements of various shapes, the elements defining pluralities of parallelly arranged channels for which it applies that channels in one layer are perpendicular to the channels in adjoining layers. Such embodiments with end panels in direct contact with the plate core are satisfactory for low temperature applications showing only low level of
•friction between the end panels and the core due to the low differential thermal expansion. Therefore the plates retain their structural rigidity and strength. Systems operating at high pressure and temperature manifest much complicated service conditions providing for a couple of problems. Due to the high temperature the panels loose their strength, particularly when they are covered by insulation allowing for reduction of heat losses and protection of personnel working in close vicinity. Under these conditions the difference of the thermal expansion of the end plate and the core respectively is large and results in an intense friction and fretting which very often damage the core-
Disclosure and Object of the Invention
The foregoing problems are solved by a heat exchanger of the desk type, having a core made of planparallelly and mutually in distance arranged plates, defining passages for heat exchanging fluids, the core being compressed between end panels by means of tie rods in an embodiment in accordance with the present invention comprising spacers filled with insulation, the spacer being arranged between the core and each of the end panels. Further in accordance with the present invention the end panels are sprung away from the core, advantageously by means of elastic elements located between the end panels and the spacers and/or located on the tie rods. Still further in accordance with the invention the spacer comprises a plurality of crossbars and in a preferred embodiment the the spacer is of a honeycomb construction.
It is an object of the invention to create thermal isolation layers protecting end panels from excessive heat from the core thus decreasing the panel temperature to the level only very little above the ambient temperature. The spacer further provides for uniform distribution of the temperature gradient between the core and the end panel. It results in negligible temperature difference between- the spacer and the adjoining core plate and the end plate respectively, which practically eliminates friction and fretting at contact surfaces of these parts. It is a further object of the invention to achieve a uniform distribution of compressiwe forces applied upon the core by the end panels which results in lower mechanical stress of tie rods and the core as well.
Brief Description of the Drawings
By way of examples the invention will be now described with reference to the accompanying drawing- Fig- 1 illustrates completely assembled heat exchanger.
while Fig. 2 shows the same in partially dismantled setup, Fig- 3 presents particular parts of the heat exchanger and Fig. 4 offers details of the core according to the Fig. 3-
Description of Preferred Embodiments
Referring to Fig- 3, the heat exchanger according to the invention, similarly to those already existing ones, comprises plate core 1, which is compressed between two end panels 2 by means of tie rods. In this embodiment the tie rods are provided for by bolts 3 passing through sleeves 4 which are distributed along end panel 2 edges. The position of end plates 2 and pressure applied by them upon the core 1 are secured by nuts 5- Each end panel 2 is on its outside surface provided with crossbars 6- The core 1 consists of flat plates 7, arranged in a planparallel layout and mutually separated by spacing elements 8 being set apart at regular intervals. The spacing elements 8 define intermediate space between adjoining plates 7, thus allowing for flow of heat-exchanging fluids and preventing excessive mechanical stress and the plate 7 deformation. The edge bars 9 located along the plate 7 edges are well sealed against the adjoining plates 7, advantageously by welds, thus providing for enclosure of the inner core 1 space. Distribution heads 14 provide for particular inlets and outlets of heat-exchanging fluids into and out of the intermediate spaces of the core 1 plates 7. Such solution constituting prior art of the problems in question, is according to the invention provided with spacers IO, which are of a honeycomb construction. The said spacers IO are placed between the core 1 and respective end plates 2. Space between spacing bars 11 of the spacers IO is filled with thermal insulation 12- The spacers IO allow for uniform distribution of pressure forces applied upon the core 1 by the end panels 2 and for uniform distribution of
a thermal gradient showing maximum values at the core 1 surface and minimum val es at the outer surface of the end panels 2. The temperature of the spacers IO and the core 1 in their contact area is nearly the same for both elements and their thermal expansion being virtually equal is thus accompanied by very little or no friction. This applies similarly for the spacers IO and the end panels 2. Uniform temperature gradient existing across the spacer IO provides for low thermal and mechanical stress not only of these parts but also of adjoining core 1 and the end plate 2. Stress due to different thermal expansion of the core and the bolts 3 is accommodated by springs 13 which simultaneously apply sufficient compressive force upon the core 1 under any operational conditions. The core 1 can be sprung away from the end panels 2 also by resilient elements placed between the end panels 2 and the spacer IO- Bolts 3 or any similar tying rods can be attached to end panels 2 also by means of welding.
Industrial applications
The present invention is designed for any application of heat exchangers operating at high temperatures and pressures-
Claims
1. Heat exchanger of the desk type, having a core made of planparallelly and mutually in distance arranged plates, defining passages for heat exchanging fluids, the core being compressed between end panels by means of tie rods, characterized in, between the core (1) and each of the end panels (2) there is arranged a spacer (10) filled with insulation (12).
2. Heat exchanger according the claim 1, characterized in, that the end panels (2) are sprung away from the core (1) .
3. Heat exchanger according the claim 2, characterized in, that resilient elements are located between the end panels (2) and the spacers (10) and/or located on the tie rods (3).
4. Heat exchanger according the claim 1, characterized in, that the spacer (10) comprises a plurality of crossbars (11).
5. Heat exchanger according the claim 1, characterized in, that the spacer (10) is of a honeycomb construction.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ932153A CZ279891B6 (en) | 1993-10-13 | 1993-10-13 | Heat-exchange apparatus of panel-like type |
CZ2153933 | 1993-10-13 | ||
PCT/CZ1994/000023 WO1995010746A1 (en) | 1993-10-13 | 1994-10-12 | Heat exchanger of the desk type |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0672235A1 true EP0672235A1 (en) | 1995-09-20 |
Family
ID=5464456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94929456A Withdrawn EP0672235A1 (en) | 1993-10-13 | 1994-10-12 | Heat exchanger of the desk type |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0672235A1 (en) |
AU (1) | AU7851894A (en) |
CZ (1) | CZ279891B6 (en) |
WO (1) | WO1995010746A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT241092Y1 (en) * | 1996-12-23 | 2001-04-20 | Recuperator S R L | HEAT EXCHANGER |
ES2150395B1 (en) * | 1999-04-21 | 2001-06-01 | Cortes Jesus Esteban | HEAT EXCHANGER SYSTEM. |
CZ298773B6 (en) * | 2002-12-19 | 2008-01-23 | Moravia-Apex, S. R. O. | Heat exchanger |
SE532732C2 (en) | 2006-11-27 | 2010-03-23 | Alfa Laval Corp Ab | Clamping device for module plates, reactor plates or heat exchanger plates and method for closing / opening one, and a control system for pressure relief in such a flow module or plate reactor |
SE533546C2 (en) | 2008-05-21 | 2010-10-19 | Alfa Laval Corp Ab | clamping |
SE534745C2 (en) | 2009-04-15 | 2011-12-06 | Alfa Laval Corp Ab | Flow Module |
DE102013203095A1 (en) * | 2013-02-26 | 2014-08-28 | Mahle International Gmbh | Suction module of a fresh air system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1770936A (en) * | 1925-07-02 | 1930-07-22 | Surface Comb Company Inc | Recuperator |
FR1125663A (en) * | 1955-06-01 | 1956-11-05 | Cem Comp Electro Mec | plate heat exchanger |
US4139054A (en) * | 1977-10-28 | 1979-02-13 | Sea Solar Power | Plate-fin heat exchanger |
DE3010866A1 (en) * | 1980-03-21 | 1981-10-01 | Wacker-Chemitronic Gesellschaft für Elektronik-Grundstoffe mbH, 8263 Burghausen | Crystal discs cutting system from rod - uses rod rotation about external axis |
-
1993
- 1993-10-13 CZ CZ932153A patent/CZ279891B6/en unknown
-
1994
- 1994-10-12 WO PCT/CZ1994/000023 patent/WO1995010746A1/en not_active Application Discontinuation
- 1994-10-12 AU AU78518/94A patent/AU7851894A/en not_active Abandoned
- 1994-10-12 EP EP94929456A patent/EP0672235A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9510746A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995010746A1 (en) | 1995-04-20 |
AU7851894A (en) | 1995-05-04 |
CZ279891B6 (en) | 1995-08-16 |
CZ215393A3 (en) | 1995-06-14 |
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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: A1 Designated state(s): DE NL |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE NL |
|
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: 19951021 |