CA1121799A - Heat exchanger of the tube and plate type - Google Patents
Heat exchanger of the tube and plate typeInfo
- Publication number
- CA1121799A CA1121799A CA000330779A CA330779A CA1121799A CA 1121799 A CA1121799 A CA 1121799A CA 000330779 A CA000330779 A CA 000330779A CA 330779 A CA330779 A CA 330779A CA 1121799 A CA1121799 A CA 1121799A
- Authority
- CA
- Canada
- Prior art keywords
- bundle
- shell
- heat exchanger
- shrouding
- tube bundle
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000006872 improvement Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000004888 barrier function Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
- F28D7/1638—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
- F28D7/1638—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one
- F28D7/1646—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one with particular pattern of flow of the heat exchange medium flowing outside the conduit assemblies, e.g. change of flow direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular 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
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
HEAT EXCHANGER OF THE TUBE AND PLATE TYPE
ABSTRACT OF THE DISCLOSURE
A heat exchanger having an outer shell with an elongated, semi-circular fluid duct plate mounted in the shell. A tube bundle slidable between the duct plate and the shell is fixed at one end relative to the shell. The fluid inlet and outlet configuration, and transverse fluid flow pattern, are typical of those described in United States patent 3,532,160. The exterior of the tube bundle is partially covered with a shrouding to contain the fluid flow within the tube bundle by allowing the fluid to exit only through the outlet side.
Sealing mechanisms running longitudinally between the shrouding and the upper duct plate, and between the shrouding and the shell, provide a seal which restricts the fluid flow to a transverse flow through the tube bundle. A seal between the supported end of the tube bundle and the shrouding confines the fluid flow in the bundle and allows for relative ex-pansion of the shrouding and the bundle. Drains are pro-vided in the shell wall on each side of the lower sealing mechanism to allow for moisture run-off from the heat exchanger.
ABSTRACT OF THE DISCLOSURE
A heat exchanger having an outer shell with an elongated, semi-circular fluid duct plate mounted in the shell. A tube bundle slidable between the duct plate and the shell is fixed at one end relative to the shell. The fluid inlet and outlet configuration, and transverse fluid flow pattern, are typical of those described in United States patent 3,532,160. The exterior of the tube bundle is partially covered with a shrouding to contain the fluid flow within the tube bundle by allowing the fluid to exit only through the outlet side.
Sealing mechanisms running longitudinally between the shrouding and the upper duct plate, and between the shrouding and the shell, provide a seal which restricts the fluid flow to a transverse flow through the tube bundle. A seal between the supported end of the tube bundle and the shrouding confines the fluid flow in the bundle and allows for relative ex-pansion of the shrouding and the bundle. Drains are pro-vided in the shell wall on each side of the lower sealing mechanism to allow for moisture run-off from the heat exchanger.
Description
7~'~
1 B~CKGROU~D OF THE I~VENTIO~
This invention relates to heat exchangers and, more particularly, to heat exchangers of the tube and plate type.
Heat exchangers of the type described in ~.S. patent 3,532,160 have been extensively and successfully used and offer many advantages, including high efficiency and the ability to position the inlet and outlet ports at any location lengthwise o~ the shell within a range equalling approximately half the shell lengbh. This invention retains the advantages of the construction described in the aforesaid patent, and further increases the efficiency of this type of heat ex-changer.
SUMMARY OF THE ~MVENTIO~ -Accordingly, an object of the present invention is to provide an even more efficient heat exchanger of the type generally described in UOS. patent 3,532,160 wherein the f].uid flow is restricted and confined to enter the inlet side of the bundle and flow transversely through the bundle, exiting only through the outlet side thereof.
~nother object of the invention is to provide the foregoing in a heat exchanger having protective means to allow for handling of the tube bundle with a minimum of possible damage to the plates and tubes~ithin the bundle.
~ further object of the invention is to provide a heat exchanger having means to more easily slide the tube bundle into posikion within the heat exchanger shell.
Still another object of the invention is to proviae the foregoing in a heat exchanger having means to allow relative expansi.on throughout without allowing any leakage of the restricted and confined fluid flow.
1 B~CKGROU~D OF THE I~VENTIO~
This invention relates to heat exchangers and, more particularly, to heat exchangers of the tube and plate type.
Heat exchangers of the type described in ~.S. patent 3,532,160 have been extensively and successfully used and offer many advantages, including high efficiency and the ability to position the inlet and outlet ports at any location lengthwise o~ the shell within a range equalling approximately half the shell lengbh. This invention retains the advantages of the construction described in the aforesaid patent, and further increases the efficiency of this type of heat ex-changer.
SUMMARY OF THE ~MVENTIO~ -Accordingly, an object of the present invention is to provide an even more efficient heat exchanger of the type generally described in UOS. patent 3,532,160 wherein the f].uid flow is restricted and confined to enter the inlet side of the bundle and flow transversely through the bundle, exiting only through the outlet side thereof.
~nother object of the invention is to provide the foregoing in a heat exchanger having protective means to allow for handling of the tube bundle with a minimum of possible damage to the plates and tubes~ithin the bundle.
~ further object of the invention is to provide a heat exchanger having means to more easily slide the tube bundle into posikion within the heat exchanger shell.
Still another object of the invention is to proviae the foregoing in a heat exchanger having means to allow relative expansi.on throughout without allowing any leakage of the restricted and confined fluid flow.
-2- ~.
1'799 Broadly speakirlg -the above objects are achieved by -the present invention which provides in a heat exchanger of the type comprising a shell having a fluid inlet and a fluid outlet, a tube bundle longitudinal].y positioned in a spaced relation to the shell, and means directing fluid flow trans-versely through the tube bundle ~rom an inlet side to an outlet side thereof, the improvement comprising: a) means for restrict-ing the transverse fluid flow to a flow only through the bundle;
and b) means ~or confining the transverse fluid flow within the bundle to exit only through the outlet side thereof, the means for confining the transverse fluid flow within the bundle com-prising shrouding parti.ally covering the exterior of the bundle the shrouding extending longitudinall~ of the bun~le substantially the full length thereof and also extending from the inlet side of the bundle to the outlet side thereof to enclose the bundle between the sides while leaving the sides open for the entrance and e~i~ing, respectively, of fluid passing transversely through the bundle in heat exchange relation therewith.
Thus, in one form thereof, the heat e~changer of the present invention comprises a cyl.indrical shell having a duct plate and a tube bundle slidable between the duct plate and shell and mounted within the shell for relative movement therein.
Two longitudinally extendi.ng sealing mechanisms are provided, one positioned between the shrouding and the duct plate and the other positioned between the shrouding and the shell wall, each comprising in the .illustrat:Lve embodiment a seal bar attached to the shrouding and Eitting between paired runner bars, attached to the shell and to the upper duct plate, to compress a resilient seal positioned between the runner bars, ~orming an effecti.ve barrier to fluid leakage. Guide feet attached to the shrouding adjacent to each seal bar position ~' ~
sd/ ~ -3-tne latter relative to the runner bars and seal elements.
The runner bars allow for easy positioning of the seal bar and provide support for the leading end of the tube b-undle as it is slid into position. A resilient strip be-tween the shrouding and the supported end of the tube bundle allows for expansion of the shrouding, thereby relieving any stress on the tubes within the bundle, and maintains the seal against fluid bypass of the bwldle. Drainage outIets are provided for removal of liquid condensed from the fluid as it is cooled to produce a moisture free effluent.
- sd/~
1 The foregoiny and other objects, advantages and characterizing features of the present invention will become clearly apparent from the ensuing detailed description of an illustrative embodiment thereof, taken together with the accompanying drawing wherein like reference numerals denDte like parks throughout the various views.
BRIEE' ~ESCRIPTIO~ OF THE DRA~I~G
Fig. 1 is a side elevational view of a heat exchanger of the present invention with portions broken away and shown partially in section to more clearly illustrate the internal structure thereof, the supported end of the tube bundle prior to assembly being shown in phantom;
Fig. 2 is a transverse sectional view, taken about on line 2-2 of Fig. l;
Fig. 3 is a fragmentary transverse sectional view, on an enlarged scale, of the shell mounted portion of the flow restricting mechanism;
Fig. 4 is a ~ragmentary transverse section view of the entire flow restricting mechanism; and Fig. 5 is a fragmentary view in longitudinal section illustratin~ an expansion detail.
DESCRIpTIo~ OF THE PREFERRED EMBODIME~T
Re~err:iny to Figs. 1 and 2, there is shown a heat exchanger constructed in accordance with the present inventlon comprising an outer cylindrical shell 10 supported on bracket feet 12 and having e~d p~ates 14 and 16 at opposite ends thereof. End plate 16 is beveled forming surface 61 which 1 allows for passage of tube sheet 34 later described herein.
~n upperfluid ductplate 18 spaced from the shell wall extends substantially the length of shell 10 and is arcuately shaped in cross section. The opposite ends of plate 18 are secured to plates 14 and 16, and a barrier wall 2 parallel to end plates 14 and 16 subdivide the space into inlet and outlet chambers 4 and 6. A first barrier wall 8 extends from wall 2 to end plate 16 on one side of plate 18, and a second barrier wall 8' extends from wall 2 to end plate 14 on the opposite side of plate 18, completing the inlet and outlet chambers. A
slidable tube bundle 30 is inserted in spaced relation between the shell 10 and the upper duct plate 18. The flow pattern ; within the shell 10, briefly described, is characterized by a fluid inlet 22 and a fluid outlet 24, both positioned on the same side of the heat exchanger as the upper duct plate 18. The entering fluid flow A is through the fluid inlet 22 into the inlet side of the shell 10 from which the fluid passes transversely through the tube bundle 30, once and throughout the full length thereof. The exiting fluid flow B leaves the kube bundle 30 through a perforated exiting plate 26, and flows to the fluid autlet 24. The tube bundle 30 positioned in spaced relation within the shell 10 has tubesheets 34 and 36 affixed to opposite ends thereof.
Tubesheet 36 is firmly attached to shell 10 and as such is stationary with respect to shell 10. Tubesheet 34 is supported within shell 10 and therefore allows for relativ,e expansion of the tube bundle 30 with respect to shell 10.
For a more detailed descr ption o-E the foregoing construction 1 and operation reference is made to United States patent
1'799 Broadly speakirlg -the above objects are achieved by -the present invention which provides in a heat exchanger of the type comprising a shell having a fluid inlet and a fluid outlet, a tube bundle longitudinal].y positioned in a spaced relation to the shell, and means directing fluid flow trans-versely through the tube bundle ~rom an inlet side to an outlet side thereof, the improvement comprising: a) means for restrict-ing the transverse fluid flow to a flow only through the bundle;
and b) means ~or confining the transverse fluid flow within the bundle to exit only through the outlet side thereof, the means for confining the transverse fluid flow within the bundle com-prising shrouding parti.ally covering the exterior of the bundle the shrouding extending longitudinall~ of the bun~le substantially the full length thereof and also extending from the inlet side of the bundle to the outlet side thereof to enclose the bundle between the sides while leaving the sides open for the entrance and e~i~ing, respectively, of fluid passing transversely through the bundle in heat exchange relation therewith.
Thus, in one form thereof, the heat e~changer of the present invention comprises a cyl.indrical shell having a duct plate and a tube bundle slidable between the duct plate and shell and mounted within the shell for relative movement therein.
Two longitudinally extendi.ng sealing mechanisms are provided, one positioned between the shrouding and the duct plate and the other positioned between the shrouding and the shell wall, each comprising in the .illustrat:Lve embodiment a seal bar attached to the shrouding and Eitting between paired runner bars, attached to the shell and to the upper duct plate, to compress a resilient seal positioned between the runner bars, ~orming an effecti.ve barrier to fluid leakage. Guide feet attached to the shrouding adjacent to each seal bar position ~' ~
sd/ ~ -3-tne latter relative to the runner bars and seal elements.
The runner bars allow for easy positioning of the seal bar and provide support for the leading end of the tube b-undle as it is slid into position. A resilient strip be-tween the shrouding and the supported end of the tube bundle allows for expansion of the shrouding, thereby relieving any stress on the tubes within the bundle, and maintains the seal against fluid bypass of the bwldle. Drainage outIets are provided for removal of liquid condensed from the fluid as it is cooled to produce a moisture free effluent.
- sd/~
1 The foregoiny and other objects, advantages and characterizing features of the present invention will become clearly apparent from the ensuing detailed description of an illustrative embodiment thereof, taken together with the accompanying drawing wherein like reference numerals denDte like parks throughout the various views.
BRIEE' ~ESCRIPTIO~ OF THE DRA~I~G
Fig. 1 is a side elevational view of a heat exchanger of the present invention with portions broken away and shown partially in section to more clearly illustrate the internal structure thereof, the supported end of the tube bundle prior to assembly being shown in phantom;
Fig. 2 is a transverse sectional view, taken about on line 2-2 of Fig. l;
Fig. 3 is a fragmentary transverse sectional view, on an enlarged scale, of the shell mounted portion of the flow restricting mechanism;
Fig. 4 is a ~ragmentary transverse section view of the entire flow restricting mechanism; and Fig. 5 is a fragmentary view in longitudinal section illustratin~ an expansion detail.
DESCRIpTIo~ OF THE PREFERRED EMBODIME~T
Re~err:iny to Figs. 1 and 2, there is shown a heat exchanger constructed in accordance with the present inventlon comprising an outer cylindrical shell 10 supported on bracket feet 12 and having e~d p~ates 14 and 16 at opposite ends thereof. End plate 16 is beveled forming surface 61 which 1 allows for passage of tube sheet 34 later described herein.
~n upperfluid ductplate 18 spaced from the shell wall extends substantially the length of shell 10 and is arcuately shaped in cross section. The opposite ends of plate 18 are secured to plates 14 and 16, and a barrier wall 2 parallel to end plates 14 and 16 subdivide the space into inlet and outlet chambers 4 and 6. A first barrier wall 8 extends from wall 2 to end plate 16 on one side of plate 18, and a second barrier wall 8' extends from wall 2 to end plate 14 on the opposite side of plate 18, completing the inlet and outlet chambers. A
slidable tube bundle 30 is inserted in spaced relation between the shell 10 and the upper duct plate 18. The flow pattern ; within the shell 10, briefly described, is characterized by a fluid inlet 22 and a fluid outlet 24, both positioned on the same side of the heat exchanger as the upper duct plate 18. The entering fluid flow A is through the fluid inlet 22 into the inlet side of the shell 10 from which the fluid passes transversely through the tube bundle 30, once and throughout the full length thereof. The exiting fluid flow B leaves the kube bundle 30 through a perforated exiting plate 26, and flows to the fluid autlet 24. The tube bundle 30 positioned in spaced relation within the shell 10 has tubesheets 34 and 36 affixed to opposite ends thereof.
Tubesheet 36 is firmly attached to shell 10 and as such is stationary with respect to shell 10. Tubesheet 34 is supported within shell 10 and therefore allows for relativ,e expansion of the tube bundle 30 with respect to shell 10.
For a more detailed descr ption o-E the foregoing construction 1 and operation reference is made to United States patent
3,532,160 the disclosure of which is hereby incorporated herein by reEerence. Drains 20 are provided in the lower wall of shell 10 to allow for discharge of moisture within the shell 10.
The present invention confines the fluid flowing transversely within the bundle 30 to exit only through the perforated plate 26. In the illustrated embodiment, this is accomplished by a shrouding 32 and 33, externally placed around the tube bundle 30, extending the full length of the bundle and completely enclosing the bundle between the inlet and outlet sides thereof. The shrouding 32 and 33 is fastened in place about the bundle 30 by a series of three tie bars 28 which extend across the inlet side of the tube bundle centrally and adjacent th~ opposite ends thereof and by plate 26, all welded thereto. The shrouding is made of a non-porous material, typically metal which provides an effective seal against fluid leakage. Therefore, once fluid has entered the bundle from the inlet side it is confined to the bundle until it exits from the outlet side.
The invention further comprises a means for restricting the transverse 1uid flow A to flow only through the bundle 30, preventiny any bypassing of the bundle. In the illustrated embodiment this is accomplished by an arrange-ment including a first pair of runner bars ~0 and ~1 attached to the shell wall. Another pair of runner bars 38 and 39 are attached to the upper duct plate 18 on the side facing the tube bundle 30. Both pairs oE runner bars have a resilient, 79~
l compressible element 42 therebetween which is V-notched in its sides and when compressed, acts as an effective sealant against fluid flow. Other types of seal elements, including metallic seals, can be used with this invention.
The runner bars all extend longitudinally the length of the shell, and are bevelled at each end of the shell pro-viding surfaces 50. The runner bar at the supported end of the tube bundle is bevelled to allow for easy removal of the tube bundle by preventing possible catching of the tubesheet 34 on the end plate 16. The stationary end is bevelled to allow for easy positioning and sliding of the tube bundle 30 during assembly. ~ pair of seal bars 47 and 48 are welded to the shrouding 32 and 33 respectively Seal bars 47 and 48 e~tend the length of the bundle 30 and serve to compress the resilient ele~ents 42 between the respective runner bars. Each seal bar is bevelled at its leading and creating surfaces 58 which engage seal elements 42 upon inserting the tube bundle in the shell, and facilitate sliding of the tube bundle 30 within the shell 10 without tearing the seal elements.
Guiding and positioning means further help in the positioning of the tube bundle 30 in the shell. The means shown ~ comprise a pair of guide feet at the leading ends of seal bars 47 and 48, respectively, one such pair of guide feet, 43 and 44 being shown in Fig. 4, one of the other pair is shown at 46 in Fig. 1, the otherof that pair not shown but being the inverted counterpart of 43 and 7g9 1 identical to 46 but on the opposite side of bar 48. The guide feet also are bevelled, creating surfaces 54 on each which engage runner bar surfaces 50. The guide feet are attached to the shrouding 32 and 33 respectively, and are found adjacent to, and on opposite sides of, their respec-tive seal bar. The guide feet engage and ride on the outer edge surfaces of the runner bars and have the essential purpose of allowing the seal bars to compress the respective resilient elements ~2 only a llmited extent, sufficient to provide a fluid tight seal between elements 42 and seal bars 47, 48, by limiting the depth of insertion of seal bars 47,48 between the respective pairs of runner bars.
In the illustrated embodiment, elements 42 are compressed only to a height e~ual to the height of the respective runner bar plus the guide feet height minus the height of the respective seal bar. This then limits compression of the elements 42 to be compressed within their elastic limits and allows the seal bars 47 and 48 to slide smoothly along the resilient elements 42. The V-notched sides of elements 42 accommodate the compression of the seal elements.
Finally, referring to Figs. 1, 2 and 5, the invenkion ~ncorporates a resilient element 37 which is fitted between said shrouding 32 and 33 and khe supported tubesheet 34 of the tube bundle 30. This allows for e~pansion of the shrouding 32 and 33 relative to the tube bundle without application of significant stress upon the tubes within the tube bundle 30. This resilient element 37, typically rubber, also has the added advantage of simultaneously providing a leak proof 79~9 1 seal agalnst the escape of fluid from the bundle 30.
In operation, the flow restricting means is engaged and made operable upon sliding the seal bars 47 and 48 between and along the respective runner bars 40, 41 and 38, 39, thereby compr~ssing the resilient element 42 therebetween.
Seal bars 47 and 48 are guided by the respective guide feet which contact and slide upon the respective runner bars, positioning the seal bars in proper relation to the seal elements 42, Coacting surfaces 50 and 54 facilita~e engage-ment of guide feet and the respective runner bars, and relative sliding movement therebetween, and surface 58 acilitates relative sliding between seal bars 47, 48 and seal elements 42 without tearing the latter. During heat exchange operation, the fluid A entering the shell can only enter the tu~e bundle 30 on the inlet side and is effectively prevented from leaking around the bundle 30 by the restricting means comprising the seal bars, runners and elements 42. Once inside the bundle, the fluid flow qan only exit through the perforated plate 26 because of the non-porous shrouding 32 and 33 covering the rest of the tube bundle 30. Therefore, all of the fluid is constrained to pass transversely completely throuyh the tube bundle. As the tube bundle 30 becomes warmer the ~i~fering expansion coefficients between the shrouding 32, 33 and the tubes is compensated for by the resilient element 37 placed between the shrouding 32j33 and the tube bundle 30 tubesheet 34~
_g_ .
t7gg 1 Another feature of this invention is that the shrouding 32,33 in addition to confining fluid flow within the bundle, covers and protects the tube bundle during handling prior to being fitted within the shell.
From the foregoing, it is apparent that the objects of the present improvement have been fully accomplished. ~s a result of the present improvement a new and improved heat exchan~er of increased efficiency is provided. A preferred embodiment of the principles of this invention having been described and illustrated, it is to be realized that the same are not limited to the particular heat exchanger con-figuration sh~wn in the drawing, and that modifications thereof are contemplated and can be made without departing from the broad spirit and scope of this invention as defined in the appended claims.
The present invention confines the fluid flowing transversely within the bundle 30 to exit only through the perforated plate 26. In the illustrated embodiment, this is accomplished by a shrouding 32 and 33, externally placed around the tube bundle 30, extending the full length of the bundle and completely enclosing the bundle between the inlet and outlet sides thereof. The shrouding 32 and 33 is fastened in place about the bundle 30 by a series of three tie bars 28 which extend across the inlet side of the tube bundle centrally and adjacent th~ opposite ends thereof and by plate 26, all welded thereto. The shrouding is made of a non-porous material, typically metal which provides an effective seal against fluid leakage. Therefore, once fluid has entered the bundle from the inlet side it is confined to the bundle until it exits from the outlet side.
The invention further comprises a means for restricting the transverse 1uid flow A to flow only through the bundle 30, preventiny any bypassing of the bundle. In the illustrated embodiment this is accomplished by an arrange-ment including a first pair of runner bars ~0 and ~1 attached to the shell wall. Another pair of runner bars 38 and 39 are attached to the upper duct plate 18 on the side facing the tube bundle 30. Both pairs oE runner bars have a resilient, 79~
l compressible element 42 therebetween which is V-notched in its sides and when compressed, acts as an effective sealant against fluid flow. Other types of seal elements, including metallic seals, can be used with this invention.
The runner bars all extend longitudinally the length of the shell, and are bevelled at each end of the shell pro-viding surfaces 50. The runner bar at the supported end of the tube bundle is bevelled to allow for easy removal of the tube bundle by preventing possible catching of the tubesheet 34 on the end plate 16. The stationary end is bevelled to allow for easy positioning and sliding of the tube bundle 30 during assembly. ~ pair of seal bars 47 and 48 are welded to the shrouding 32 and 33 respectively Seal bars 47 and 48 e~tend the length of the bundle 30 and serve to compress the resilient ele~ents 42 between the respective runner bars. Each seal bar is bevelled at its leading and creating surfaces 58 which engage seal elements 42 upon inserting the tube bundle in the shell, and facilitate sliding of the tube bundle 30 within the shell 10 without tearing the seal elements.
Guiding and positioning means further help in the positioning of the tube bundle 30 in the shell. The means shown ~ comprise a pair of guide feet at the leading ends of seal bars 47 and 48, respectively, one such pair of guide feet, 43 and 44 being shown in Fig. 4, one of the other pair is shown at 46 in Fig. 1, the otherof that pair not shown but being the inverted counterpart of 43 and 7g9 1 identical to 46 but on the opposite side of bar 48. The guide feet also are bevelled, creating surfaces 54 on each which engage runner bar surfaces 50. The guide feet are attached to the shrouding 32 and 33 respectively, and are found adjacent to, and on opposite sides of, their respec-tive seal bar. The guide feet engage and ride on the outer edge surfaces of the runner bars and have the essential purpose of allowing the seal bars to compress the respective resilient elements ~2 only a llmited extent, sufficient to provide a fluid tight seal between elements 42 and seal bars 47, 48, by limiting the depth of insertion of seal bars 47,48 between the respective pairs of runner bars.
In the illustrated embodiment, elements 42 are compressed only to a height e~ual to the height of the respective runner bar plus the guide feet height minus the height of the respective seal bar. This then limits compression of the elements 42 to be compressed within their elastic limits and allows the seal bars 47 and 48 to slide smoothly along the resilient elements 42. The V-notched sides of elements 42 accommodate the compression of the seal elements.
Finally, referring to Figs. 1, 2 and 5, the invenkion ~ncorporates a resilient element 37 which is fitted between said shrouding 32 and 33 and khe supported tubesheet 34 of the tube bundle 30. This allows for e~pansion of the shrouding 32 and 33 relative to the tube bundle without application of significant stress upon the tubes within the tube bundle 30. This resilient element 37, typically rubber, also has the added advantage of simultaneously providing a leak proof 79~9 1 seal agalnst the escape of fluid from the bundle 30.
In operation, the flow restricting means is engaged and made operable upon sliding the seal bars 47 and 48 between and along the respective runner bars 40, 41 and 38, 39, thereby compr~ssing the resilient element 42 therebetween.
Seal bars 47 and 48 are guided by the respective guide feet which contact and slide upon the respective runner bars, positioning the seal bars in proper relation to the seal elements 42, Coacting surfaces 50 and 54 facilita~e engage-ment of guide feet and the respective runner bars, and relative sliding movement therebetween, and surface 58 acilitates relative sliding between seal bars 47, 48 and seal elements 42 without tearing the latter. During heat exchange operation, the fluid A entering the shell can only enter the tu~e bundle 30 on the inlet side and is effectively prevented from leaking around the bundle 30 by the restricting means comprising the seal bars, runners and elements 42. Once inside the bundle, the fluid flow qan only exit through the perforated plate 26 because of the non-porous shrouding 32 and 33 covering the rest of the tube bundle 30. Therefore, all of the fluid is constrained to pass transversely completely throuyh the tube bundle. As the tube bundle 30 becomes warmer the ~i~fering expansion coefficients between the shrouding 32, 33 and the tubes is compensated for by the resilient element 37 placed between the shrouding 32j33 and the tube bundle 30 tubesheet 34~
_g_ .
t7gg 1 Another feature of this invention is that the shrouding 32,33 in addition to confining fluid flow within the bundle, covers and protects the tube bundle during handling prior to being fitted within the shell.
From the foregoing, it is apparent that the objects of the present improvement have been fully accomplished. ~s a result of the present improvement a new and improved heat exchan~er of increased efficiency is provided. A preferred embodiment of the principles of this invention having been described and illustrated, it is to be realized that the same are not limited to the particular heat exchanger con-figuration sh~wn in the drawing, and that modifications thereof are contemplated and can be made without departing from the broad spirit and scope of this invention as defined in the appended claims.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a heat exchanger of the type comprising a shell having a fluid inlet and a fluid outlet, a tube bundle longitudinally positioned in a spaced relation to said shell, and means directing fluid flow transversely through said tube bundle from an inlet side to an outlet side thereof, the improvement comprising:
a) means for restricting the transverse fluid flow to a flow only through said bundle; and b) means for confining said transverse fluid flow within said bundle to exit only through said outlet side thereof, said means for confining said transverse fluid flow within said bundle comprising shrouding partially covering the exterior of said bundle, said shrouding extending longitudinally of said bundle substantially the full length thereof and also extending from said inlet side of said bundle to said outlet side thereof to enclose said bundle between said sides while leaving said sides open for the entrance and exiting, respectively, of fluid passing transversely through said bundle in heat exchange relation therewith.
a) means for restricting the transverse fluid flow to a flow only through said bundle; and b) means for confining said transverse fluid flow within said bundle to exit only through said outlet side thereof, said means for confining said transverse fluid flow within said bundle comprising shrouding partially covering the exterior of said bundle, said shrouding extending longitudinally of said bundle substantially the full length thereof and also extending from said inlet side of said bundle to said outlet side thereof to enclose said bundle between said sides while leaving said sides open for the entrance and exiting, respectively, of fluid passing transversely through said bundle in heat exchange relation therewith.
2. A heat exchanger as defined in claim 1, said means for restricing said transverse flow within said shell comprising a pair of runner bars, longitudinally extending along an inner shell wall with a resilient element therebetween, a seal bar longitudinally extending along said tube bundle, and guide means adjacent to said seal bar, whereby said seal bar fits between said runner bars thereby compressing said resilient element, and said guide mean contact a runner bar to position said seal bar in sealing relation to said resilient element.
3. A heat exchanger as defined in claim 2, said means directing fluid flow including an upper fluid duct plate mounted longitudinally within said shell in spaced relation to said tube bundle and said inner shell wall, said fluid inlet and outlet being on the same side of said shell as said duct plate, and said runner bars being connected to said duct plate.
4. A heat exchanger as defined in claim 2, said runner bars being connected to said inner shell wall.
5. A heat exchanger as defined in claim 3, said restricting means including a second pair of runner bars longitudinally extending along an inner shell wall portion opposite said duct plate and connected to said shell wall portion and having a second resilient element therebetween, a second seal bar longitudinally extending along said tube bundle, and second guide means in contact with a second runner bar to position said second seal bar in sealing relation to said second resilient element, said restricting means being positioned between the inlet and outlet sides of said bundle in generally opposed relation.
6. A heat exchanger as defined in claim 3, said guide means comprising guide feet adjacent to and on either side of said seal bar, said guide feet contacting said runner bars and allowing said seal bar to compress said resilient element only a limited extent.
7. A heat exchanger as defined in claim 1 with means allowing expansion of said shrouding relative to said bundle.
8. A heat exchanger as defined in claim 7, said means for allowing shrouding expansion comprising a resilient element positioned between said shrouding and an end of said tube bundle.
9. A heat exchanger as defined in claim 3, a second pair of runner bars longitudinally extending along an inner shell wall portion opposite said duct plate and connected to said shell wall portion, a second resilient element between said second runner bars, a second seal bar longitudinally extending along said tube bundle, guide feet adjacent such seal bar and ?tacting said runner bars to limit the compression of said resilient elements by said seal bars, said restricting means being positioned between the inlet and outlet sides of said bundle in generally opposed relation, and a shrouding covering the exterior of said bundle between the inlet and outlet sides thereof to confine fluid flow therein.
10. A heat exchanger as defined in claim 1, wherein said means for restricting said transverse flow within said shell comprises sealing means between said bundle and said shell extending longitudinally of said bundle and located between the inlet and outlet sides thereof.
11. A heat exchanger as defined in claim 10, further including second sealing means between said bundle and said shell generally opposite said first-named sealing means, extending longitudinally of said bundle and located between the inlet and outlet sides thereof.
12. A heat exchanger as defined in claim 1, wherein said means for restricting the transverse fluid flow to a flow only through said bundle comprises sealing means between said shrouding and said shell, said sealing means extending Longitudinally of said bundle between said inlet and outlet sides thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US93463178A | 1978-08-17 | 1978-08-17 | |
| US934,631 | 1978-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1121799A true CA1121799A (en) | 1982-04-13 |
Family
ID=25465834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000330779A Expired CA1121799A (en) | 1978-08-17 | 1979-06-28 | Heat exchanger of the tube and plate type |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5528494A (en) |
| CA (1) | CA1121799A (en) |
| DE (1) | DE2932913A1 (en) |
| FR (1) | FR2433727B1 (en) |
| GB (1) | GB2027864B (en) |
| IT (1) | IT1122247B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3869136A1 (en) * | 2020-02-21 | 2021-08-25 | Mitsubishi Heavy Industries Compressor Corporation | Cooling device |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4548260A (en) * | 1983-03-11 | 1985-10-22 | American Precision Industries, Inc. | Heat exchanger |
| JPS61223491A (en) * | 1985-03-27 | 1986-10-04 | Babcock Hitachi Kk | Multi-tubular type heat exchanger |
| EP0297970B1 (en) * | 1987-06-28 | 1994-10-12 | Terumo Kabushiki Kaisha | Heat exchanger for medical treatment |
| US5704422A (en) * | 1995-05-19 | 1998-01-06 | Huntsman Specialty Chemicals Corporation | Shrouded heat exchanger |
| MX2009006110A (en) * | 2006-12-14 | 2009-06-17 | Shell Int Research | Assembly of baffles and seals and method of assembling a heat exchanger. |
| SE532506C2 (en) * | 2008-03-31 | 2010-02-09 | Lindab Ab | Method and apparatus for ventilating a space |
| JP5123834B2 (en) * | 2008-12-08 | 2013-01-23 | 株式会社神戸製鋼所 | Shell and tube heat exchanger |
| DE102011081031A1 (en) * | 2011-08-16 | 2013-02-21 | Behr Gmbh & Co. Kg | Exhaust gas heat exchanger |
| DE102013000766A1 (en) * | 2013-01-18 | 2014-07-24 | Man Diesel & Turbo Se | cooler |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1211918A (en) * | 1957-12-23 | 1960-03-18 | Foster Wheeler Ltd | advanced heat exchangers |
| GB1203233A (en) * | 1967-10-10 | 1970-08-26 | Xflo Heat Exchangers Ltd | Improvements in or relating to heat exchangers |
| FR2092687A1 (en) * | 1970-06-08 | 1972-01-28 | American Precision Ind | Tube and plate heat exchanger |
-
1979
- 1979-06-28 CA CA000330779A patent/CA1121799A/en not_active Expired
- 1979-07-16 GB GB7924704A patent/GB2027864B/en not_active Expired
- 1979-07-20 IT IT24538/79A patent/IT1122247B/en active
- 1979-08-10 JP JP10272979A patent/JPS5528494A/en active Pending
- 1979-08-13 FR FR7920594A patent/FR2433727B1/en not_active Expired
- 1979-08-14 DE DE19792932913 patent/DE2932913A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3869136A1 (en) * | 2020-02-21 | 2021-08-25 | Mitsubishi Heavy Industries Compressor Corporation | Cooling device |
| US11519644B2 (en) | 2020-02-21 | 2022-12-06 | Mitsubishi Heavy Industries Compressor Corporation | Cooling device |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1122247B (en) | 1986-04-23 |
| FR2433727A1 (en) | 1980-03-14 |
| GB2027864A (en) | 1980-02-27 |
| JPS5528494A (en) | 1980-02-29 |
| GB2027864B (en) | 1983-05-25 |
| IT7924538A0 (en) | 1979-07-20 |
| FR2433727B1 (en) | 1986-09-19 |
| DE2932913A1 (en) | 1980-03-06 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |