CA1121336A - Tube shell heat exchanger with baffles and serpentine tubing - Google Patents
Tube shell heat exchanger with baffles and serpentine tubingInfo
- Publication number
- CA1121336A CA1121336A CA000362583A CA362583A CA1121336A CA 1121336 A CA1121336 A CA 1121336A CA 000362583 A CA000362583 A CA 000362583A CA 362583 A CA362583 A CA 362583A CA 1121336 A CA1121336 A CA 1121336A
- Authority
- CA
- Canada
- Prior art keywords
- baffles
- cover
- shell
- enclosure
- tube
- 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
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Tube and Shell Heat Exchanger with Baffles and Serpentine Tubing Abstract A tube and shell heat exchanger is provided having counter flow heat transfer. A shell assembly has a series of baffles located therein. A cover assembly having cover baffles is mounted to the shell assembly for coacting with the baffles of the shell to provide a serpentine flow path through the heat exchanger. A
serpentine shaped tube is placed within the heat exchanger such that the baffles form a counter flow path for fluid flowing within the shell and the tube forms a fluid flow path for heat transfer media flowing through the tubes.
serpentine shaped tube is placed within the heat exchanger such that the baffles form a counter flow path for fluid flowing within the shell and the tube forms a fluid flow path for heat transfer media flowing through the tubes.
Description
3~6 Tube and Shell Heat Exchanger with Baffles and Serpentine Tubing The present invention relates to a tube and shell heat exchanger.
More specifically, the present invention relates to an improved tube and shell heat exchanger having two sets of baffles and serpentine tubing for achieving a counter flow heat exchange relationship.
A typical tube and shell heat exchanger has a series of tubes throu~h which a heat transfer media flows and a shell containing both the tubes and a second heat transfer media in heat transfer relation with the first heat transfer media. A series of baffles and/or combination tub~ supports and baffles axe often provided for directing the ~low of the second heat transfer media within the shell in various directions in relation to the flow of heat transfer media through the tubes.
Many tube and shell heat exchangers provide for cross flow baffles such that the fluid flowing through the shell is directed perpendicular to the tubes therein.
Another type of tube and shell heat exchanger is a tube in tube heat exchanger having two coaxial tubes of different dia~eter, one located within the other. ~he first heat transfer media flows in the internal tube and the second heat transfer media flows within : i , ' 3~
the larger tube such that the two heat transfer media flow in opposite directions and heat energy is transferred between them through the inner tube.
The present invention concerns a tube and shell structure for accomplishing with a tube and shell heat exchanger the same counter flow relationship as a tube in tube heat exchanger. A
series of baffles located in a casing coact with a series of baffles secured to the cover such that a serpentine tube may be arranged within the heat exchanger. Flow through the tube is in a direction opposite to the flow through the shell such that a counter flow heat exchanger is provided.
The invention includes a casing or shell with a number of spaced parallel shell baffles. A serpentine tube is inserted within the shell such that a loop of the tubing extends between adjacent shell baffles~ A cover having a series of cover baffles is then inserted such that the cover baffles extend between the legs of each loop such that when assembled there is provided a serpentine tube and a serpentine path for fluid flowing in heat transfer relations with the tube by the combination of baffles from the shell and the cover.
This invention will now be described by way of example, with reference to the accompanying drawings in which Figure 1 is a view of the assembled heat exchanger with a portion of the casing removed to expose the two sets of baffles and the tubing.
~igure 2 is a perspective view of the cover assembly of the heat exchanger.
~igure 3 is a perspective view of ~he tube assembly of the heat exchanger.
~ ~$~36 Figure 4 is a perspective view of the shell assembly of the heat exchanger.
The embodiment of the invention described below is for use as a S chiller in a vapor compression refrigeration circuit and as such is used to cool a liquid for circulation to an enclosure to be conditioned. It is to be understood that this heat exchanger finds like applicability in other applications such as a condenser and that it is not limited in scope to this particular use.
Referring first to Figures 2, 3 and 4, perspective views of the three assemblies of the heat exchanger, it can be seen that these three principle components are assembled to comprise the heat exchanger.
In Figure 4 there is shown the shell assembly 20 having a casing 22 with an opening 25 at one end. Mounted within shell assembly 20 are shell baffles 24 spaced from each other and located in parallel planes. The shell baffles 24 divide the shell into a plurality of zones 70. Each zone 70 is the space between adjacent shell baffles. It can also be seen in Figure 4 that the shell baffles extend from one end of the casing to a termination point which is spaced from the opening of the casing.
In Figure 3, tube assembly 38 is shown wherein serpentine tubes 30 are manifolded to comprise the heat exchanger. Inlet tube 31 is connected to distributor 33, which distributes refrigerant to four capillary tubes 35 9 one capillary tube being connected to each serpentine tube 30. The tube is arranged in a serpentine co~figuration and connects to tube collectors 37. Refrigerant flow is then merged into collector 36 which results in a single refrigerant flow out of the heat e~changer through outlet 32.
The serpentine arrangement of this heat exchanger may be viewed as comprising hairpin sections 51 and return bend portions 55. The . ~
hairpin portion of tube 30 is that portion within the dotted line designated 51 and having leg portions 53 and connecting portion 54 connecting the two leg portions to each other. Additionally shown within a separate dotted line is return bend portion 55 which connects the legs oE the adjacent hairpin portions. Consequently, it may be thought of that the entire serpentine arrangement consists of a series of hairpins and return bends connected to each other. Of course it is understood that this may be but a single piece of tubing bent to this particular configuration.
Cover assembly 40 may be seen in Figure 2. Cover plate 42 is adapted to fit over opening 25 of the shell assembly to form a fluid tight container therewith. Cover plate 42 has openings 45 therein through which inlet tube 31 and outlet tube 32 extend.
Additionally, cover plate 42 has openings 46 and 47 through which the water or other fluid to be chilled may circulate through the heat exchanger. Cover baffles 44 are shown extending from the cover inwardly, said baffles terminating prior to reaching the far side of the casing.
Referrin8 now to Figure 1 there may be seen an assembled view of the heat exchanger. Therein it will be seen the corresponding relationship of baffles 44A through 44F extending from the cover and baffles 24A through 24~ extending from the casing. As can be seen in Figure 1, the baffles 24A through 24E divide the heat exchanger into six zones 70. Additionally? baffles 44A through 44F divide each of the zones 70 into two regions. Hence it can be seen that the serpentine tubing as arranged has a hairpin 51 located within each zone and a leg portion of each hairpin locatPd within a region of each zone.
Connecting portion 54 of hairpin 51 secures the two leg portions of the hairpin and extends in the space between the end of the cover baffles 44 and casing 22. Likewise return bend portion 55
More specifically, the present invention relates to an improved tube and shell heat exchanger having two sets of baffles and serpentine tubing for achieving a counter flow heat exchange relationship.
A typical tube and shell heat exchanger has a series of tubes throu~h which a heat transfer media flows and a shell containing both the tubes and a second heat transfer media in heat transfer relation with the first heat transfer media. A series of baffles and/or combination tub~ supports and baffles axe often provided for directing the ~low of the second heat transfer media within the shell in various directions in relation to the flow of heat transfer media through the tubes.
Many tube and shell heat exchangers provide for cross flow baffles such that the fluid flowing through the shell is directed perpendicular to the tubes therein.
Another type of tube and shell heat exchanger is a tube in tube heat exchanger having two coaxial tubes of different dia~eter, one located within the other. ~he first heat transfer media flows in the internal tube and the second heat transfer media flows within : i , ' 3~
the larger tube such that the two heat transfer media flow in opposite directions and heat energy is transferred between them through the inner tube.
The present invention concerns a tube and shell structure for accomplishing with a tube and shell heat exchanger the same counter flow relationship as a tube in tube heat exchanger. A
series of baffles located in a casing coact with a series of baffles secured to the cover such that a serpentine tube may be arranged within the heat exchanger. Flow through the tube is in a direction opposite to the flow through the shell such that a counter flow heat exchanger is provided.
The invention includes a casing or shell with a number of spaced parallel shell baffles. A serpentine tube is inserted within the shell such that a loop of the tubing extends between adjacent shell baffles~ A cover having a series of cover baffles is then inserted such that the cover baffles extend between the legs of each loop such that when assembled there is provided a serpentine tube and a serpentine path for fluid flowing in heat transfer relations with the tube by the combination of baffles from the shell and the cover.
This invention will now be described by way of example, with reference to the accompanying drawings in which Figure 1 is a view of the assembled heat exchanger with a portion of the casing removed to expose the two sets of baffles and the tubing.
~igure 2 is a perspective view of the cover assembly of the heat exchanger.
~igure 3 is a perspective view of ~he tube assembly of the heat exchanger.
~ ~$~36 Figure 4 is a perspective view of the shell assembly of the heat exchanger.
The embodiment of the invention described below is for use as a S chiller in a vapor compression refrigeration circuit and as such is used to cool a liquid for circulation to an enclosure to be conditioned. It is to be understood that this heat exchanger finds like applicability in other applications such as a condenser and that it is not limited in scope to this particular use.
Referring first to Figures 2, 3 and 4, perspective views of the three assemblies of the heat exchanger, it can be seen that these three principle components are assembled to comprise the heat exchanger.
In Figure 4 there is shown the shell assembly 20 having a casing 22 with an opening 25 at one end. Mounted within shell assembly 20 are shell baffles 24 spaced from each other and located in parallel planes. The shell baffles 24 divide the shell into a plurality of zones 70. Each zone 70 is the space between adjacent shell baffles. It can also be seen in Figure 4 that the shell baffles extend from one end of the casing to a termination point which is spaced from the opening of the casing.
In Figure 3, tube assembly 38 is shown wherein serpentine tubes 30 are manifolded to comprise the heat exchanger. Inlet tube 31 is connected to distributor 33, which distributes refrigerant to four capillary tubes 35 9 one capillary tube being connected to each serpentine tube 30. The tube is arranged in a serpentine co~figuration and connects to tube collectors 37. Refrigerant flow is then merged into collector 36 which results in a single refrigerant flow out of the heat e~changer through outlet 32.
The serpentine arrangement of this heat exchanger may be viewed as comprising hairpin sections 51 and return bend portions 55. The . ~
hairpin portion of tube 30 is that portion within the dotted line designated 51 and having leg portions 53 and connecting portion 54 connecting the two leg portions to each other. Additionally shown within a separate dotted line is return bend portion 55 which connects the legs oE the adjacent hairpin portions. Consequently, it may be thought of that the entire serpentine arrangement consists of a series of hairpins and return bends connected to each other. Of course it is understood that this may be but a single piece of tubing bent to this particular configuration.
Cover assembly 40 may be seen in Figure 2. Cover plate 42 is adapted to fit over opening 25 of the shell assembly to form a fluid tight container therewith. Cover plate 42 has openings 45 therein through which inlet tube 31 and outlet tube 32 extend.
Additionally, cover plate 42 has openings 46 and 47 through which the water or other fluid to be chilled may circulate through the heat exchanger. Cover baffles 44 are shown extending from the cover inwardly, said baffles terminating prior to reaching the far side of the casing.
Referrin8 now to Figure 1 there may be seen an assembled view of the heat exchanger. Therein it will be seen the corresponding relationship of baffles 44A through 44F extending from the cover and baffles 24A through 24~ extending from the casing. As can be seen in Figure 1, the baffles 24A through 24E divide the heat exchanger into six zones 70. Additionally? baffles 44A through 44F divide each of the zones 70 into two regions. Hence it can be seen that the serpentine tubing as arranged has a hairpin 51 located within each zone and a leg portion of each hairpin locatPd within a region of each zone.
Connecting portion 54 of hairpin 51 secures the two leg portions of the hairpin and extends in the space between the end of the cover baffles 44 and casing 22. Likewise return bend portion 55
2~`3~
connects adjacent hairpins and extends through the space between the ends of shell bafEles 2~ and cover plate 42.
It can be seen in Figure 1 that refrigerant enters the heat exchanger through inlet tube 31, flows through the distributor and the capillary tubes into tubes 30 and then follows the serpentine configuration through the heat exchanger until it exits the heat exchanger at outlet 32. Conversely, water or other liquid enters through inlet ~6 and flows along the path created by the baffles.
The water flows, as seen in Figure 1, from left to right along the bottom of the heat exchanger around the end of cover baffle 44F
and from right to left around the end of shell baffle 24E and from left to right across the heat exchanger and around the end of cover baffle 44E, from right to left across the heat exchanger and around the end of cover baffle 24D, from left to right across the heat exchanger and around the end of cover baffle 44D and from right to left across the heat exchanger and around the end of shell baffle 24C and so on back and forth across the heat exchanger until it flows from right to left across the top of the heat exchanger and out outlet 47. It can thus be seen that the heat exchanger has been provided where the water or other liquid to be cooled flowing therethrough is in complete counter current flow to the refrigerant flowing through the tube.
It is to be understood that this small and efficient heat exchanger may be manufactured from a variety of material including plastic. Copper tube may be well adapted to be utilized with a plastic casing and cover and plastic baffles to provide for a safe, economical, reliable and highly efficient compact heat exchanger.
The assembly of the heat exchanger is accomplished by inserting the tube assembly 38 into shell assembly 20 and then inserting cover assembly 40 into shell assembly 20 with the cover baffles extending bet~een the hairpins of the tube assembly to form the
connects adjacent hairpins and extends through the space between the ends of shell bafEles 2~ and cover plate 42.
It can be seen in Figure 1 that refrigerant enters the heat exchanger through inlet tube 31, flows through the distributor and the capillary tubes into tubes 30 and then follows the serpentine configuration through the heat exchanger until it exits the heat exchanger at outlet 32. Conversely, water or other liquid enters through inlet ~6 and flows along the path created by the baffles.
The water flows, as seen in Figure 1, from left to right along the bottom of the heat exchanger around the end of cover baffle 44F
and from right to left around the end of shell baffle 24E and from left to right across the heat exchanger and around the end of cover baffle 44E, from right to left across the heat exchanger and around the end of cover baffle 24D, from left to right across the heat exchanger and around the end of cover baffle 44D and from right to left across the heat exchanger and around the end of shell baffle 24C and so on back and forth across the heat exchanger until it flows from right to left across the top of the heat exchanger and out outlet 47. It can thus be seen that the heat exchanger has been provided where the water or other liquid to be cooled flowing therethrough is in complete counter current flow to the refrigerant flowing through the tube.
It is to be understood that this small and efficient heat exchanger may be manufactured from a variety of material including plastic. Copper tube may be well adapted to be utilized with a plastic casing and cover and plastic baffles to provide for a safe, economical, reliable and highly efficient compact heat exchanger.
The assembly of the heat exchanger is accomplished by inserting the tube assembly 38 into shell assembly 20 and then inserting cover assembly 40 into shell assembly 20 with the cover baffles extending bet~een the hairpins of the tube assembly to form the
3~
heat exchanger assembly. Appropriate sealing means may be used to provide a secure fit between the cover assembly and the shell assembly. Appropriate connections may be made at outlets 46 and 47 to provide for water flow therethrough as well as refrigerant connections with the refrigerant tubing.
The refrigerant tubing as shown may be the evaporator of a refrigeration circuit wherein refrigerant undergoes a pressure drop through the capillary tubes and changes state from a liquid to a gas absorbing heat energy from the water to be cooled in the heat exchanger. However, the application of this heat exchanger as the evaporator or chiller of a refrigeration circuit or even to a heat exchanger having refrigerant and water is not considered a limitation of the present invention. Any heat transfer between two media may be accomplished USillg this heat exchanger.
The invention has been described in detail with particular reference to a preferred embodiment thereof but will be understood that variations and modifications can be effected within the spirit and scope of the invention.
~s .
heat exchanger assembly. Appropriate sealing means may be used to provide a secure fit between the cover assembly and the shell assembly. Appropriate connections may be made at outlets 46 and 47 to provide for water flow therethrough as well as refrigerant connections with the refrigerant tubing.
The refrigerant tubing as shown may be the evaporator of a refrigeration circuit wherein refrigerant undergoes a pressure drop through the capillary tubes and changes state from a liquid to a gas absorbing heat energy from the water to be cooled in the heat exchanger. However, the application of this heat exchanger as the evaporator or chiller of a refrigeration circuit or even to a heat exchanger having refrigerant and water is not considered a limitation of the present invention. Any heat transfer between two media may be accomplished USillg this heat exchanger.
The invention has been described in detail with particular reference to a preferred embodiment thereof but will be understood that variations and modifications can be effected within the spirit and scope of the invention.
~s .
Claims (10)
1. A heat exchanger for transferring heat energy between the first fluid and the second fluid which comprises a shell assembly including a casing forming an open ended enclosure and a plurality of shell baffles defining a series of zones within the enclosure, a cover assembly adapted to cover the opening in the casing, said cover assembly having a series of cover baffles which extend between the shell baffles dividing each zone of the enclosure into two regions and having means to supply the second fluid to the enclosure, and a serpentine shaped tube having the first fluid flowing therethrough located within the enclosure said tube extending into each zone of the enclosure and having a portion thereof located within each region of each zone such that heat energy may be transferred between the first fluid and the second fluid.
2. The apparatus as set forth in claim 1 wherein the cover baffles extending from the cover into the zones of the enclosure terminate prior to the end of the zone such that there is a space within the enclosure between the end of the cover baffle and the casing, and wherein the shell baffles extending from the casing terminate prior to the cover such that there is a space within the enclosure between the cover assembly and the end of the shell baffles.
3. The apparatus as set forth in claim 2 wherein the serpentine shaped tube comprises hairpin portions each having two legs joined by a connecting portion extending into each zone of the enclosure, said hairpin portions having a cover baffle extending between the legs of the hairpin portions such that one leg of the hairpin portion is within each region of the zone and wherein the connecting portion of the hairpin portion is located in the space between the end of the cover baffle and the casing.
4. The apparatus as set forth in claim 3 wherein the serpentine shaped tube further comprises return bend portions connecting adjacent hairpin portions, the return bend portions being located between the end of the shell baffles and the cover plate to connect hairpin portions of the adjacent zones.
5. The apparatus as set forth in claim 4 wherein the first fluid flows through the tube and the second fluid flows through the casing in the flow path defined by the cover baffles and shell baffles, said flow path being the same path defined by the tube.
6. The apparatus as set forth in claim 5 wherein the first fluid flowing through the tube is connected to flow in an opposite direction from the second fluid flowing through the casing.
7. A heat exchanger for transferring heat energy between a first liquid and a second fluid which comprises a shell assembly having a casing defining an open ended enclosure and a series of shell baffles dividing the casing into a plurality of zones, said zones extending from one end of the casing to a termination point spaced from the open end of the enclosure, a cover assembly for closing the enclosure by covering the opening with a cover plate, said assembly having a series of cover baffles extending from the cover plate, one into each zone of the enclosure, the cover baffles having a termination point spaced from the end of the casing from which the shell baffles commence such that the combination of baffles provides a serpentine flow path through the enclosure, said cover assembly further including means for supplying fluid to the fluid flow path of the enclosure; and a tube assembly in a serpentine configuration mounted within the flow path of the enclosure such that heat energy may be transferred between the fluid flowing through the tube and liquid flowing along the flow path.
8. The apparatus as set forth in claim 7 wherein the shell baffles are spaced from each other and are located in planes substantially parallel with each other, wherein the cover baffles are spaced from each other and located in planes substantially parallel with the planes of the shell baffles and wherein the cover baffles are located approximately midway between adjacent shell baffles to divide each zone into two approximately equal regions.
9. The apparatus as set forth in claim 8 wherein the tube assembly comprises a series of hairpin portions connected by return bend portions, one hairpin portion being located in each zone and the return bend portions connecting adjacent hairpin portions.
10. The apparatus as set forth in claim 9 wherein each hairpin portion of the tube has two leg portions and a connecting portion, one leg portion located in each region of the zone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10680879A | 1979-12-26 | 1979-12-26 | |
| US106,808 | 1979-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1121336A true CA1121336A (en) | 1982-04-06 |
Family
ID=22313386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000362583A Expired CA1121336A (en) | 1979-12-26 | 1980-10-16 | Tube shell heat exchanger with baffles and serpentine tubing |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1121336A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872503A (en) * | 1986-03-13 | 1989-10-10 | Marriner Raymond E | Air heat exchanger |
| US5001906A (en) * | 1989-05-04 | 1991-03-26 | Chicago Bridge & Iron Technical Services Company | High pressure heat exchanger for cooling high fouling liquids |
| EP2818225A1 (en) * | 2013-06-24 | 2014-12-31 | Ebara Corporation | Exhaust gas abatement system |
-
1980
- 1980-10-16 CA CA000362583A patent/CA1121336A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872503A (en) * | 1986-03-13 | 1989-10-10 | Marriner Raymond E | Air heat exchanger |
| US5001906A (en) * | 1989-05-04 | 1991-03-26 | Chicago Bridge & Iron Technical Services Company | High pressure heat exchanger for cooling high fouling liquids |
| EP2818225A1 (en) * | 2013-06-24 | 2014-12-31 | Ebara Corporation | Exhaust gas abatement system |
| TWI639800B (en) * | 2013-06-24 | 2018-11-01 | 荏原製作所股份有限公司 | Apparatus for processing exhausted gas |
| US10227926B2 (en) | 2013-06-24 | 2019-03-12 | Ebara Corporation | Exhaust gas abatement system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |