WO2003021177A1 - Piping system and method of making the same and associated method of heat transfer - Google Patents
Piping system and method of making the same and associated method of heat transfer Download PDFInfo
- Publication number
- WO2003021177A1 WO2003021177A1 PCT/IN2002/000177 IN0200177W WO03021177A1 WO 2003021177 A1 WO2003021177 A1 WO 2003021177A1 IN 0200177 W IN0200177 W IN 0200177W WO 03021177 A1 WO03021177 A1 WO 03021177A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flow
- pipe
- piping system
- ducts
- fluid
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- 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
- F28D7/10—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 one within the other, e.g. concentrically
- F28D7/103—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 one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
-
- 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
- F28F1/34—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 obliquely
- F28F1/36—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 obliquely the means being helically wound fins or wire spirals
Definitions
- This invention relates to equipments of a chemical plant, where number of equipments are connected, fluids are transported between equipments by piping and heat is exchanged between process fluids and coolant or thermal fluids by using heat exchangers.
- heat exchangers are devices that provide the flow of thermal energy between two and more fluids at different temperatures. According to heat transfer processes, heat exchangers are classified as direct contact type and indirect contact type. In the direct contact type heat exchangers, heat is transferred between the cold and hot fluids through direct contact between these fluids. There is no separation wall between the hot and cold streams.
- In the indirect contact type heat exchangers the heat energy is exchanged between hot and cold fluids through a heat transfer surface, which is a wall separating the fluids; the cold and hot fluids flow simultaneously while heat energy is transferred through a separating wall.
- Indirect contact and direct transfer heat exchangers are also called recuperators, tubular (double-pipe or shell-and-tube), plate and extended surface heat exchangers.
- the investment in chemical plant equipment indicates that heat exchangers are generally the most important items in a chemical plant.
- a double-pipe heat exchanger of indirect contact type is known, As per second edition of book namely, Heat Exchangers, Selection, Rating and Thermal design, authored by Sadik Kakac and Hongtan Liu and published by CRC Press in the Year 2002, pages 7 to 8, which consists of one pipe placed concentrically inside another pipe of a larger diameter with appropriate fittings to direct the flow of fluids.
- the major use of the double - pipe heat exchanger however is where smaller heat transfer area is required. The major disadvantage is that it is bulky and expensive per unit of heat transfer surface area.
- a number of equipments to carry out heat transfer in a chemical plant are reduced by use of a modified piping system, which simultaneously transports as well as cools or heats the process fluids instead of using separate piping equipment for transport of process fluid and separate indirect contact heat exchanger equipment for cooling or heating of the process fluid. Due to this reduction in number of equipment to carry out heat transfer; the total cost of building a chemical plant is reduced.
- modified piping system uses coaxially fitted multiple pipes, where coolant or thermal fluid flows through annular space on one or both sides of pipe carrying the process fluid, heat transfer is increased and thereby modified piping system becomes compact and less expensive.
- the modified piping system with optional extended surfaces and 105 turbulent surfaces further improves the heat transfer and makes the modified piping system more compact and more cost effective.
- the modified piping system with multiple pipes can be used, wherever higher heat transfer area is required per unit space.
- the flow ducts of modified piping system transporting coolant or thermal fluid are provided with extended surfaces. This provision of extended surfaces within flow ducts transporting coolant or thermal fluid increases contact surface area of coolant and thermal fluid and thereby increases the transfer of heat from or to the process fluid.
- the modified piping system, with spiral extended surfaces in flow ducts which also forms annular flow ducts within flow ducts transporting coolant or thermal fluids improves the flow circulation and thereby improves heat transfer of coolant or thermal fluids.
- the flow ducts of the modified piping system, transporting the process 120 fluid is provided with spaced plates. The provision of these spaced plates within flow ducts transporting process fluid helps to uniformly distribute heat of the process fluid through extended surfaces to coolant or thermal fluids.
- the modified piping system with spiral spaced plates, which also forms annular flow ducts within flow ducts transporting process fluid, 130 improves flow circulation and heat transfer of process fluid.
- FIG.1 is a part sectional view of the modified piping system consisting of three pipes construction, according to the first most preferred embodiment of the invention. 135
- FIG.2 is a part sectional view of the modified piping system consisting of five pipes construction, according to second embodiment of the invention.
- FIG.3 is a part sectional view of the modified piping system consisting of two pipes construction, according to third embodiment of the invention.
- FIG.4 is the modified piping system according to the invention 140 integrated into the chemical plant between two chemical equipment such as pump tank and tower.
- FIG.5 is the prior art where piping is used for transport and heat exchanger is used for heating or cooling between two chemical equipment such as pump tank and tower. 145
- the list of reference numbers and the nomenclature of parts used in the drawings are described below :
- Inner pipe (1) is a cylindrical hollow pipe having outer diameter smaller than the inner diameter of the center pipe (2).
- Center pipe (2) is the cylindrical hollow pipe having outer diameter smaller than the inner diameter of the outer pipe(3) and inner diameter larger than the outer diameter of the inner pipe(l).
- Outer pipe (3) is the cylindrical hollow pipe having inner diameter larger than the outer diameter of the center pipe(2).
- Support member (4) is the cylindrical rod or pipe with outer diameter smaller than the inner diameter of the inner pipe(l).
- Extended surfaces in inner annular space (5) is the spiral plates, width of which corresponds substantially to difference in radii of interior surface of wall of the inner pipe(l) and the exterior surface of wall of the
- Spaced plates in center annular space (6) is the spiral plates, width of which corresponds substantially to difference in radii of interior surface of wall of the center pipe(2) and the exterior surface of wall of the inner pipe(l)
- Extended surfaces in outer annular space (7) is the spiral plates, width of which corresponds substantially to difference in radii of interior surface of wall of the outer pipe(3) and the exterior surface of wall of the center pipe(2).
- Center pipe inlet flange (8) is a thick metal ring having bolt holes.
- the 195 inside diameter of the ring is welded to one end of a piece of pipe.
- the other end of the same piece of pipe is welded to the same pipe size hole made in the center pipe (2).
- the process fluid enters the center pipe (2) of the modified piping system through the center pipe inlet flange (8).
- Center pipe outlet flange (9) is a thick metal ring having bolt holes. 200 The inside diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece is welded to the same pipe size hole made in the center pipe (2). The process fluid exits the center pipe (2) of modified piping system through center pipe outlet flange (9).
- Inner pipe inlet flange (10) is a thick metal ring having bolt holes.
- the 205 inside diameter of the ring is welded to one end of the inner pipe (1).
- the coolant or thermal fluid enters the inner pipe (1) of the modified piping system through the inner pipe inlet flange (10).
- Inner pipe outlet flange (11) is a thick metal ring having bolt holes. The inside diameter of the ring is welded to the other end of the inner
- the coolant or thermal fluid exits the inner pipe (1) of the modified piping system through the inner pipe outlet flange (1 1).
- Outer pipe inlet flange (12) is a thick metal ring having bolt holes. The inside diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece is welded to the same pipe size hole made in
- the coolant or thermal fluid enters the outer pipe (3) of the modified piping system through the outer pipe inlet flange (12).
- Outer pipe outlet flange (13) is a thick metal ring having bolt holes. The inside diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece is welded to the same pipe size hole
- the coolant or thermal fluid exits the outer pipe (3) of the modified piping system through the outer pipe outlet flange (13).
- Process fluid pump tank (14) is the tank holding the process fluid, which requires transportation to the tower (23) as well as heating or
- Process Fluid Pump (15) is the pump, which transports the process fluid from pump tank (14) and forces it through the center annular space of the modified piping system (16) into the tower (23).
- Inner annular space of the modified piping system (17) is the annular space between inner pipe (1) and support member (4) and
- 235 carries coolant or thermal fluid.
- Outer annular space of the modified piping system (18) is the annular space between outer pipe (3) and center pipe (2) and carries coolant or thermal fluid.
- Process fluid inlet flange (19) is the ring having drilled holes.
- the 240 inner diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece of pipe, is welded to the same size hole made in upper part of the tower (23).
- This ring is to be bolted to outlet flange for center pipe (9).
- the process fluid enters the tower (23) through this flange connection.
- Process fluid outlet flange (20) is the ring having drilled holes.
- the inner diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece of pipe, is welded to the same size hole made in lower part of the tower (23).
- the process fluid exits the tower (23) through this flange connection.
- Gas inlet flange (21) is the ring having drilled holes.
- the inner diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece of pipe, is welded to the same size hole made in lower side of the tower (23).
- the gas enters the tower (23) through this flange connection.
- Gas outlet flange (22) is the ring having drilled holes.
- the inner diameter of the ring is welded to one end of a piece of pipe and the other end of the same piece of pipe, is welded to the same size hole made in top or top side of the tower (23).
- the gas exits the tower (23) through this flange connection.
- the tower (23) is a cylindrical shell with closed top and bottom having various holes for connecting process fluid inlet flange (19), process fluid outlet flange (20), Gas inlet flange (21) and Gas outlet flange (22).
- the heat exchanger (24) is the heat exchanger having inlet and outlet for the process fluid and inlet and outlet for the coolant or thermal fluid. 265 It is used for heating or cooling of the process fluid with the help of coolant or thermal fluid.
- Conventional Piping (25) is the hollow pipe that is connected from process fluid pump (15) to the heat exchanger (24) and from heat exchanger (24) to the tower (23). It is used for transporting process fluid 270 from process fluid pump tank (14) to heat exchanger (24) and from the heat exchanger (24) to the tower (23) in a chemical plant. Disclosure of the Invention
- FIG 1 to 5 extended surfaces (5,7) and spaced plates (6) are shown only 275 for partial length of pipes. In practice, they are provided for predetermined length of corresponding pipe, as required by the process.
- the FIG.1 is the first most preferred embodiment having three-pipe construction.
- the support member (4) has its length, greater than the length of inner pipe (1).
- the extended surfaces in the inner annular space (5), 280 comprising of spiral plates and having optional turbulent surface with its inner diameter substantially equal to the outer diameter of the support member (4) and outer diameter substantially equal to inner diameter of the center pipe (2) is disposed over the support member (4) until the full length, of the extended surfaces in the inner annular space (5) which is 285 substantially equal to length of the inner pipe (1) covers the support member (4).
- the inner pipe(l) having its inner diameter substantially equal to the outer diameter of the extended surfaces in inner annular space (5) and its length smaller than the length of the support member (4) is disposed over the outer edge of the extended surfaces in the inner annular space (5) .
- the outer edge of the extended surfaces in inner annular space (5) presses against the inner surface of the inner pipe (1) and thereby makes a good thermal contact.
- the spaced plates in center annular space (6) comprising of spiral plates and having optional turbulent surface with its inner diameter substantially equal to the outer diameter of the inner pipe (1) and outer diameter substantially equal to the inner diameter of the center pipe (2) is disposed over the inner pipe (1), until the full length of the spaced plates in
- center annular space (6) which is substantially equal to the straight length of the center pipe (2) covers the inner pipe (1).
- the center pipe (2) having its inner diameter substantially equal to the outer diameter of the spaced plates in center annular space (6) and having its length smaller than the length of the inner pipe (1) is disposed over the outer edge of the spaced
- outer annular space (7) comprising of spiral plates and having optional turbulent surface with its inner diameter substantially equal to the outer diameter of the center pipe (2) and the outer diameter substantially equal to the inner diameter of the outer pi ⁇ e(3) is
- outer pipe (3) having its inner diameter substantially equal to the outer diameter of the extended surfaces in outer annular space (7) and its length smaller
- center pipe (2) are closed by two rings, each of the two rings having its inner diameter substantially equal to the outer diameter of the inner pipe (1) and having its outer diameter substantially equal to the
- each ring is welded at respective end of the center pipe (2) to its inner surface, and inner circumferential surface of each ring is welded to the respective outer surface of the inner pipe (1) to make a leak proof joint.
- outer pipe (3) are closed by two rings, each of the two
- each ring is welded at respective end of the outer pipe (3) to its inner surface, and inner circumferential surface of each ring is welded to the respective outer surface
- An inner pipe inlet flange (10) and an inner pipe outlet flange (11) with inner diameter of each of the flanges (10, 11) substantially equal to the outer diameter of the inner pipe (1) are inserted from each end over the outer diameter of the inner pipe (1), until the outer flat surfaces of flanges
- An inlet hole of diameter substantially equal to inner diameter of center pipe inlet flange (8) is made in the cylindrical surface of the center
- center pipe outlet flange (9) center pipe outlet flange (9), and also substantially equal to the diameter of the outlet hole of the center pipe (2).
- One end of this other piece of pipe is welded to the center pipe outlet flange (9) and other end of the same piece of pipe is welded to circumferential surface of the outlet hole of the center pipe(2).
- An inlet hole of diameter substantially equal to inner diameter of outer pipe inlet flange (12) is made in the cylindrical surface of the outer pipe (3) near one end thereof, and an outlet hole of diameter substantially equal to inner diameter of outer pipe outlet flange (13) is made in the cylindrical surface of the outer pipe (3) near the other end thereof.
- FIG. 2 shows five pipe construction, according to second embodiment of this invention and its construction with five pipes is similar to the three pipe construction with this embodiment having five pipes and
- FIG.3 shows two pipe construction, according the third embodiment of the invention and its construction with two pipes is similar to the three pipe construction with this third embodiment having two pipes
- FIG.4 shows the modified piping system integrated into a chemical plant between two equipments of a chemical plant like a process fluid pump tank (14) and a tower (23).
- process fluid pump tank (14) requiring heating or cooling and also transport to the tower (23) is transported by a means of the process fluid pump (15).
- the process fluid is transported from the pump tank (14) through the center annular space of the modified piping system (16) to the tower (23). While the process fluid is being transported through center annular space of
- the process fluid is simultaneously heated or cooled by means of coolant or thermal fluid circulated through inner annular space of the modified piping system (17) and outer annular space of the modified piping system (18).
- the process fluid is therefore transported at the required temperature to a tower (23) by means of the modified piping
- FIG.5 shows the prior art in which separately a conventional piping(25) is utilized for transport of process fluid from process fluid pump
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN841MU2001 | 2001-08-31 | ||
IN841/MUM/2001 | 2001-08-31 |
Publications (1)
Publication Number | Publication Date |
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WO2003021177A1 true WO2003021177A1 (en) | 2003-03-13 |
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ID=11097285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/IN2002/000177 WO2003021177A1 (en) | 2001-08-31 | 2002-08-29 | Piping system and method of making the same and associated method of heat transfer |
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WO (1) | WO2003021177A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011127823A (en) * | 2009-12-17 | 2011-06-30 | Panasonic Corp | Heat exchanger and water heater with the same |
CN102135382A (en) * | 2010-01-21 | 2011-07-27 | 上海意发玛制药设备有限公司 | Pipe-in-pipe type heat exchanger and pipeline system with same |
CN101704064B (en) * | 2009-09-28 | 2013-02-13 | 侯马市模范机械制造有限公司 | Z-shaped tower type highly-efficient dry sand cooling device with internal water-cooled tube and external water-cooled tube |
CN104482650A (en) * | 2014-12-24 | 2015-04-01 | 武汉浩宏科技有限公司 | Air energy water heater and condenser thereof |
CN104501479A (en) * | 2014-12-24 | 2015-04-08 | 武汉浩宏科技有限公司 | Double-spiral type condenser and air-source water heater comprising same |
CN105333613A (en) * | 2014-08-15 | 2016-02-17 | 曾银娟 | Water heater and condenser |
JP2016528471A (en) * | 2013-08-19 | 2016-09-15 | トレイン・エアー・コンディショニング・システムズ・(チャイナ)・カンパニー・リミテッド | Gas cooler |
EP3115725A4 (en) * | 2014-03-05 | 2017-07-05 | The Chugoku Electric Power Co., Inc. | Double tube, heat exchanger, and method for manufacturing double tube |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH532765A (en) * | 1971-04-28 | 1973-01-15 | Seccacier | Exchanger for the production of domestic hot water |
US4284133A (en) * | 1979-09-19 | 1981-08-18 | Dunham-Bush, Inc. | Concentric tube heat exchange assembly with improved internal fin structure |
DE3443085A1 (en) * | 1983-12-07 | 1985-06-13 | Kühner GmbH & Cie, 7155 Oppenweiler | Double-tube heat exchanger |
EP0449124A1 (en) * | 1990-03-29 | 1991-10-02 | Hubert Vogt | Annular space heat exchanger |
US5174369A (en) * | 1991-09-09 | 1992-12-29 | Custom Metalcraft Inc. | Sanitary concentric tube heat exchanger |
-
2002
- 2002-08-29 WO PCT/IN2002/000177 patent/WO2003021177A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH532765A (en) * | 1971-04-28 | 1973-01-15 | Seccacier | Exchanger for the production of domestic hot water |
US4284133A (en) * | 1979-09-19 | 1981-08-18 | Dunham-Bush, Inc. | Concentric tube heat exchange assembly with improved internal fin structure |
DE3443085A1 (en) * | 1983-12-07 | 1985-06-13 | Kühner GmbH & Cie, 7155 Oppenweiler | Double-tube heat exchanger |
EP0449124A1 (en) * | 1990-03-29 | 1991-10-02 | Hubert Vogt | Annular space heat exchanger |
US5174369A (en) * | 1991-09-09 | 1992-12-29 | Custom Metalcraft Inc. | Sanitary concentric tube heat exchanger |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101704064B (en) * | 2009-09-28 | 2013-02-13 | 侯马市模范机械制造有限公司 | Z-shaped tower type highly-efficient dry sand cooling device with internal water-cooled tube and external water-cooled tube |
JP2011127823A (en) * | 2009-12-17 | 2011-06-30 | Panasonic Corp | Heat exchanger and water heater with the same |
CN102135382A (en) * | 2010-01-21 | 2011-07-27 | 上海意发玛制药设备有限公司 | Pipe-in-pipe type heat exchanger and pipeline system with same |
JP2016528471A (en) * | 2013-08-19 | 2016-09-15 | トレイン・エアー・コンディショニング・システムズ・(チャイナ)・カンパニー・リミテッド | Gas cooler |
EP3115725A4 (en) * | 2014-03-05 | 2017-07-05 | The Chugoku Electric Power Co., Inc. | Double tube, heat exchanger, and method for manufacturing double tube |
CN105333613A (en) * | 2014-08-15 | 2016-02-17 | 曾银娟 | Water heater and condenser |
CN104482650A (en) * | 2014-12-24 | 2015-04-01 | 武汉浩宏科技有限公司 | Air energy water heater and condenser thereof |
CN104501479A (en) * | 2014-12-24 | 2015-04-08 | 武汉浩宏科技有限公司 | Double-spiral type condenser and air-source water heater comprising same |
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