CA2413819A1 - Low temperature heating system for a hydrocarbon storage tank - Google Patents
Low temperature heating system for a hydrocarbon storage tank Download PDFInfo
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- CA2413819A1 CA2413819A1 CA 2413819 CA2413819A CA2413819A1 CA 2413819 A1 CA2413819 A1 CA 2413819A1 CA 2413819 CA2413819 CA 2413819 CA 2413819 A CA2413819 A CA 2413819A CA 2413819 A1 CA2413819 A1 CA 2413819A1
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- heat transfer
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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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0206—Heat exchangers immersed in a large body of liquid
- F28D1/0213—Heat exchangers immersed in a large body of liquid for heating or cooling a liquid in a tank
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- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0472—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A low temperature heating system for a hydrocarbon storage tank includes a storage tank and several open face tubular helical coils disposed within the storage tank. Each helical coil has an inlet end and an outlet end. Heat transfer fluids are circulated through a heat exchanger and a heat exchange takes place with hot engine fluids provided by an engine.
Description
TITLE OF THE INVENTION:
Low Temperature Heating System for a Hydrocarbon Storage Tank FIELD OF THE INVENTION
The present invention relates to a low temperature heating system for a hydrocarbon storage tank BACKGROUND OF THE INVENTION
Hydrocarbon storage tanks in use in the oil industry commonly use a fire tube as a heat source. A fire tube is a tube that extends through the storage tank. Each end of the fire tube is accessible from outside the storage tank. A
burner is externally mounted at one end of the fire tube. As the name °'fire tube" implies, a flame from the burner is directed into the tube.
It will be understood that the use of a fire tube distributes heat unevenly in the storage tank. Hydrocarbons in close proximity to the flame receive more heat than hydrocarbons at a distance from the flame. It has recently been determined that product in the storage tank in close proximity to the flame is invariably subjected to excessive heat from the fire tube. This excessive heat adversely affects the product and makes additional processing necessary. The change in the hydrocarbons as a result of excessive heat, has been compared to the change in an egg when subjected to heat.
S'U1~1ARY OF THE INVENTION
What is required is a low temperature heating system for a hydrocarbon Storage tank that will not adversely affect the stored hydrocarbons.
According to the present invention there is provided a low temperature heat3_ng system for a hydrocarbon storage tank which includes a storage tank with several open face tubular helical coils disposed within the storage tank. Each helical coil has an inlet end and an outlet end. Means are provided for circulating heated heat transfer fluids through each the helical coils, whereby heat is transferred from the heat transfer fluids in the helical coils to liquids in the tank.
Heating the storage tank by circulating heated fluids through the helical coils has proven to be an effective low temperature heating system. Enough helical coils are used to ensure adequate heat is generated within the storage tank.
The larger heating surface allows the storage tank to be heated at a lower heating temperature.
Although beneficial results may be obtained through the use of the low temperature heating system, as described above, even more beneficial results may be obtained when the means for circulating the heated fluid through the helical coils includes at least one heat exchanger having a first inlet, a first outlet, a first fluid circulation path extending from the first inlet to the first outlet, a second inlet, a second outlet and a second fluid circulation path extending from the second inlet to the second outlet. A
closed loop circulation conduit connects the outlet end of the at least one heat exchanger with the inlet end of each of the helical coils, and the outlet end of each of the helical coils to the first inlet of the at least: one heat exchanger, such that heat transfer fluids are heated as they pass along the first fluid circulation path of the at least one heat exchanger. A pump is connected to the closed loop circulation conduit and adapted to circulate heat transfer fluids through the closed loop circulation conduit. An engine is provided with an engine fluids conduit communicating with the second inlet. Hot engine fluids produced by the engine are passed along the second fluid path of the at least one heat exchanger, whereby a heat transfer occurs between the hot engine fluids passing along the second fluid path and the heat transfer fluids passing along the first fluid path. The low temperature heating system, as described above, can be heated with exhaust gases from the eng~_ne, engine coolant or both.
It is preferred that some means be provide to accommodate expansion and contraction of the heat transfer fluids circulating within the closed loop circulation conduit. Even more beneficial results may, therefore, be obtained when the closed loop circulation conduit has an expansion tank adapted to receive excess heat transfer fluids from the closed loop circulation conduit resulting from expansion brought about by increased temperatures. Even more beneficial results may be obtained when the closed loop circulation conduit has a make up tank adapted to inject additional heat transfer fluids into the closed loop circulation conduit resulting from a contraction brought on by decreases in temperature.
Although the helical coils can be laid on their sides, the best results have been obtained when the helical coils are placed in a vertical orientation. It is preferred that the helical coils are positioned off the bottom of the storage tank, extending upwardly from a hydrocarbon/water interface zone.
It is possible to use different helical coil configurations. For example, helical coils can be constructed which have an inner coil and a concentric outer coil, in order to increase the surface area available for heat transfer.
Low Temperature Heating System for a Hydrocarbon Storage Tank FIELD OF THE INVENTION
The present invention relates to a low temperature heating system for a hydrocarbon storage tank BACKGROUND OF THE INVENTION
Hydrocarbon storage tanks in use in the oil industry commonly use a fire tube as a heat source. A fire tube is a tube that extends through the storage tank. Each end of the fire tube is accessible from outside the storage tank. A
burner is externally mounted at one end of the fire tube. As the name °'fire tube" implies, a flame from the burner is directed into the tube.
It will be understood that the use of a fire tube distributes heat unevenly in the storage tank. Hydrocarbons in close proximity to the flame receive more heat than hydrocarbons at a distance from the flame. It has recently been determined that product in the storage tank in close proximity to the flame is invariably subjected to excessive heat from the fire tube. This excessive heat adversely affects the product and makes additional processing necessary. The change in the hydrocarbons as a result of excessive heat, has been compared to the change in an egg when subjected to heat.
S'U1~1ARY OF THE INVENTION
What is required is a low temperature heating system for a hydrocarbon Storage tank that will not adversely affect the stored hydrocarbons.
According to the present invention there is provided a low temperature heat3_ng system for a hydrocarbon storage tank which includes a storage tank with several open face tubular helical coils disposed within the storage tank. Each helical coil has an inlet end and an outlet end. Means are provided for circulating heated heat transfer fluids through each the helical coils, whereby heat is transferred from the heat transfer fluids in the helical coils to liquids in the tank.
Heating the storage tank by circulating heated fluids through the helical coils has proven to be an effective low temperature heating system. Enough helical coils are used to ensure adequate heat is generated within the storage tank.
The larger heating surface allows the storage tank to be heated at a lower heating temperature.
Although beneficial results may be obtained through the use of the low temperature heating system, as described above, even more beneficial results may be obtained when the means for circulating the heated fluid through the helical coils includes at least one heat exchanger having a first inlet, a first outlet, a first fluid circulation path extending from the first inlet to the first outlet, a second inlet, a second outlet and a second fluid circulation path extending from the second inlet to the second outlet. A
closed loop circulation conduit connects the outlet end of the at least one heat exchanger with the inlet end of each of the helical coils, and the outlet end of each of the helical coils to the first inlet of the at least: one heat exchanger, such that heat transfer fluids are heated as they pass along the first fluid circulation path of the at least one heat exchanger. A pump is connected to the closed loop circulation conduit and adapted to circulate heat transfer fluids through the closed loop circulation conduit. An engine is provided with an engine fluids conduit communicating with the second inlet. Hot engine fluids produced by the engine are passed along the second fluid path of the at least one heat exchanger, whereby a heat transfer occurs between the hot engine fluids passing along the second fluid path and the heat transfer fluids passing along the first fluid path. The low temperature heating system, as described above, can be heated with exhaust gases from the eng~_ne, engine coolant or both.
It is preferred that some means be provide to accommodate expansion and contraction of the heat transfer fluids circulating within the closed loop circulation conduit. Even more beneficial results may, therefore, be obtained when the closed loop circulation conduit has an expansion tank adapted to receive excess heat transfer fluids from the closed loop circulation conduit resulting from expansion brought about by increased temperatures. Even more beneficial results may be obtained when the closed loop circulation conduit has a make up tank adapted to inject additional heat transfer fluids into the closed loop circulation conduit resulting from a contraction brought on by decreases in temperature.
Although the helical coils can be laid on their sides, the best results have been obtained when the helical coils are placed in a vertical orientation. It is preferred that the helical coils are positioned off the bottom of the storage tank, extending upwardly from a hydrocarbon/water interface zone.
It is possible to use different helical coil configurations. For example, helical coils can be constructed which have an inner coil and a concentric outer coil, in order to increase the surface area available for heat transfer.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are far the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIGURE 1 is a schematic diagram of a low temperature heating system for a hydrocarbon storage tank constructed in accordance with the teachings of the present invention.
FIGURE 2 is a side elevation view, in section, of a hydrocarbon storage tank represented in FIGURE 1.
FIGURE 3 is a top plan view of a hydrocarbon storage tank represented in FIGURE 1.
FIGURE 4 is a top plan view of an alternative form of helical coil having a inner coil and a concentric outer coil.
FIGURE 5 is a top plan view of a hydrocarbon storage tank represented in FIGURE 1 showing coils in pairs.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a low temperature heating system for a hydrocarbon storage tank generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 5.
Structure and Relationship of Parts:
Referring to FIGURE 1, low temperature heating system 10 includes a closed loop circulation conduit 12 fluidly connected to a pump 14, an exhaust gas heat exchanger 16, an engine fluids heat exchanger 18 and a storage tank 20. Closed loop circulation conduit 12 is further adapted with expansion tank 22 having exit valve 24 and make up tank 26 having inlet valve 28. An engine 30 is provided with radiator 32, engine fluids conduit 34, exhaust manifold 36 and exhaust gases conduit 38. A thermostatically controlled diverter valve 39 directs fluid along engine fluids conduit 34 to either radiator 32 or back to engine 30. Storage tank 20 contains several open face tubular helical coils 40. Each of exhaust 5 gas heat exchanger 16 and engine fluids heat exchanger 18 have a first inlet 42, a first outlet 44, a first fluid circulation path 46 extending from first inlet 42 to first outlet 44, a second inlet 48, a second outlet 50 and a second fluid circulation path 52 extending from second inlet 48 to second outlet 50. Each of second fluid circulation paths 52 is positioned in optimum proximity for heat exchange within each of exhaust gas heat exchanger 16 and engine fluids heat exchanger 18 respectively. Referring to FIGURES 2 and 3, each of several open facE: tubular helical coils 40 has an inlet end 54 and an outlet end 56. Each of several open face tubular helical coils 40 is oriented off bottom of storage tank 58, extending vertically upward from a hydrocarbon/water interface zone 60 to top of storage tank 62. Storage tank 20 is further adapted with coil supports 64. It will be appreciated that other configurations of open face tubular helical coils 40 are possible. Referring to FIGURE 4, in the illustrated embodiment, open face tubular helical coils 40 are inter-wound with a concentric outer coil 66. Referring to FIGURE 5, open face tubular helical coils 40 are configured within storage tank 20 in pairs 68.
Operation:
The use and operation of Low Temperature Heating System for a Hydrocarbon Storage Tank generally referred to as numeral 10, will now be described with Reference to FIGURES 1 through 5.
Referring to FIGURE 1, several open face tubular helical coils 40 within storage tank 20, expansion tank 22 having exit valve 24, make up tank 26 having inlet valve 28, exhaust gas heat exchanger 16 and engine fluids heat exchanger 18 are all positioned serially along closed loop circulation conduit 12. Fluid within closed loop circulation conduit 12 is moved in a circulation loop by pump 14 which is also in series along closed loop circulation conduit 12. To uniformly heat hydrocarbons within storage tank 20, engine 30 is operated at normal operating temperature. Hot. exhaust gases are channelled from engine 30 through exhaust manifold 36 into exhaust gases conduit 38. Exhaust gases conduit 38 further channels hot exhaust gases through second inlet 48 into second fluid circulation path 52 within exhaust gas heat exchanger 16 after which hot exhaust gases are vented to the atmosphere. Where second fluid circulation path 52 within exhaust gases heat exchanger 16 is in optimum proximity for heat exchange, heat is transferred to fluid within first fluid circulation path 46. As pump 14 is operated, fluid within first fluid circulation path 4~ is propelled out of exhaust gas heat exchanger through first outlet 44. As the heated fluid moves along closed loop circulation conduit 12 it enters first fluid circulation path 46 through first inlet 42 of engine fluids heat exchanger 18. Hot engine fluids from engine 30 flow into engine fluids conduit 34. Engine fluids conduit 34 further channels hot engine fluids through second inlet 48 into second fluid circulation path 52 within engine fluids heat exchanger 18 after which engine fluids proceed to thermostatically controlled diverter valve 39 where fluid is directed to radiator 32 if it remains above a pre-set temperature or directly back to engine 30 by passing radiator 32 if it is below the pre-set temperature. Where second fluid circulation path 52 within engine fluid:> heat exchanger 18 is in optimum proximity for heat exchange, further heat is transferred to already heated fluid within first fluid circulation path 46. Propelled by pump 14, heated fluid within first fluid circulation path 46 exits engine fluids heat exchanger 18 through first outlet 44. As the further heated fluid moves a:Long closed loop circulation conduit 12 it enters storage tank 20. Referring to FIGURES 2 and 3. as heated fluid circulates through each of several open face tubular helical coils 40 within storage tank 20, hydrocarbons within storage tank 20 are evenly and uniformly heated. The open face, helical design is most efficient, providing a maximum surface area for heat transfer. The vertical orientation of each of several open face tubular helical coils 40 creates a convection current or "chimney effect"
that not only serves to break out gases and reduce foam in heavy gaseous fluids, but also is self washing and less susceptible to clogging and sand bridging. It will be appreciated that other variations in number, length, diameter and pitch of the several open face tubular helical coils 40 may be manifest based upon the needs and conditions in the field. One such preferred embodiment: is having open face tubular helical coils 40 inter-wound with concentric outer coils 66 as shown in FIGURE 4. Another such preferred embodiment is having open face tubular helical coils 40 configured in pairs 68 as shown in FIGURE 5. Concentric coils 66 and pairs 68 can merely be added or removed to suit the heat requirements of a particular installation.
Referring to FIGURE 1, upon heating hydrocarbons within storage tank 20, fluid within closed loop circulation conduit 12 leaves storage tank 20 and returns to pump 14 to be re-propelled to at least one of exhaust gas heat exchanger 16 or engine fluids heat exchanger 18.
In the preferred embodiment, where low temperature heating system for a hydrocarbon storage tank 10 is subject to expansion, exit valve 24 releases fluid from closed loop circulation conduit 12 into expansion tank 22. Inversely, in the preferred embodiment, where low temperature heating system for a hydrocarbon storage tank 10 is subject to contraction, inlet valve 28 introduces fluid into closed loop circulation conduit 12 from make up tank 26.
In this document, the word "compr:ising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements..
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are far the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIGURE 1 is a schematic diagram of a low temperature heating system for a hydrocarbon storage tank constructed in accordance with the teachings of the present invention.
FIGURE 2 is a side elevation view, in section, of a hydrocarbon storage tank represented in FIGURE 1.
FIGURE 3 is a top plan view of a hydrocarbon storage tank represented in FIGURE 1.
FIGURE 4 is a top plan view of an alternative form of helical coil having a inner coil and a concentric outer coil.
FIGURE 5 is a top plan view of a hydrocarbon storage tank represented in FIGURE 1 showing coils in pairs.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a low temperature heating system for a hydrocarbon storage tank generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 5.
Structure and Relationship of Parts:
Referring to FIGURE 1, low temperature heating system 10 includes a closed loop circulation conduit 12 fluidly connected to a pump 14, an exhaust gas heat exchanger 16, an engine fluids heat exchanger 18 and a storage tank 20. Closed loop circulation conduit 12 is further adapted with expansion tank 22 having exit valve 24 and make up tank 26 having inlet valve 28. An engine 30 is provided with radiator 32, engine fluids conduit 34, exhaust manifold 36 and exhaust gases conduit 38. A thermostatically controlled diverter valve 39 directs fluid along engine fluids conduit 34 to either radiator 32 or back to engine 30. Storage tank 20 contains several open face tubular helical coils 40. Each of exhaust 5 gas heat exchanger 16 and engine fluids heat exchanger 18 have a first inlet 42, a first outlet 44, a first fluid circulation path 46 extending from first inlet 42 to first outlet 44, a second inlet 48, a second outlet 50 and a second fluid circulation path 52 extending from second inlet 48 to second outlet 50. Each of second fluid circulation paths 52 is positioned in optimum proximity for heat exchange within each of exhaust gas heat exchanger 16 and engine fluids heat exchanger 18 respectively. Referring to FIGURES 2 and 3, each of several open facE: tubular helical coils 40 has an inlet end 54 and an outlet end 56. Each of several open face tubular helical coils 40 is oriented off bottom of storage tank 58, extending vertically upward from a hydrocarbon/water interface zone 60 to top of storage tank 62. Storage tank 20 is further adapted with coil supports 64. It will be appreciated that other configurations of open face tubular helical coils 40 are possible. Referring to FIGURE 4, in the illustrated embodiment, open face tubular helical coils 40 are inter-wound with a concentric outer coil 66. Referring to FIGURE 5, open face tubular helical coils 40 are configured within storage tank 20 in pairs 68.
Operation:
The use and operation of Low Temperature Heating System for a Hydrocarbon Storage Tank generally referred to as numeral 10, will now be described with Reference to FIGURES 1 through 5.
Referring to FIGURE 1, several open face tubular helical coils 40 within storage tank 20, expansion tank 22 having exit valve 24, make up tank 26 having inlet valve 28, exhaust gas heat exchanger 16 and engine fluids heat exchanger 18 are all positioned serially along closed loop circulation conduit 12. Fluid within closed loop circulation conduit 12 is moved in a circulation loop by pump 14 which is also in series along closed loop circulation conduit 12. To uniformly heat hydrocarbons within storage tank 20, engine 30 is operated at normal operating temperature. Hot. exhaust gases are channelled from engine 30 through exhaust manifold 36 into exhaust gases conduit 38. Exhaust gases conduit 38 further channels hot exhaust gases through second inlet 48 into second fluid circulation path 52 within exhaust gas heat exchanger 16 after which hot exhaust gases are vented to the atmosphere. Where second fluid circulation path 52 within exhaust gases heat exchanger 16 is in optimum proximity for heat exchange, heat is transferred to fluid within first fluid circulation path 46. As pump 14 is operated, fluid within first fluid circulation path 4~ is propelled out of exhaust gas heat exchanger through first outlet 44. As the heated fluid moves along closed loop circulation conduit 12 it enters first fluid circulation path 46 through first inlet 42 of engine fluids heat exchanger 18. Hot engine fluids from engine 30 flow into engine fluids conduit 34. Engine fluids conduit 34 further channels hot engine fluids through second inlet 48 into second fluid circulation path 52 within engine fluids heat exchanger 18 after which engine fluids proceed to thermostatically controlled diverter valve 39 where fluid is directed to radiator 32 if it remains above a pre-set temperature or directly back to engine 30 by passing radiator 32 if it is below the pre-set temperature. Where second fluid circulation path 52 within engine fluid:> heat exchanger 18 is in optimum proximity for heat exchange, further heat is transferred to already heated fluid within first fluid circulation path 46. Propelled by pump 14, heated fluid within first fluid circulation path 46 exits engine fluids heat exchanger 18 through first outlet 44. As the further heated fluid moves a:Long closed loop circulation conduit 12 it enters storage tank 20. Referring to FIGURES 2 and 3. as heated fluid circulates through each of several open face tubular helical coils 40 within storage tank 20, hydrocarbons within storage tank 20 are evenly and uniformly heated. The open face, helical design is most efficient, providing a maximum surface area for heat transfer. The vertical orientation of each of several open face tubular helical coils 40 creates a convection current or "chimney effect"
that not only serves to break out gases and reduce foam in heavy gaseous fluids, but also is self washing and less susceptible to clogging and sand bridging. It will be appreciated that other variations in number, length, diameter and pitch of the several open face tubular helical coils 40 may be manifest based upon the needs and conditions in the field. One such preferred embodiment: is having open face tubular helical coils 40 inter-wound with concentric outer coils 66 as shown in FIGURE 4. Another such preferred embodiment is having open face tubular helical coils 40 configured in pairs 68 as shown in FIGURE 5. Concentric coils 66 and pairs 68 can merely be added or removed to suit the heat requirements of a particular installation.
Referring to FIGURE 1, upon heating hydrocarbons within storage tank 20, fluid within closed loop circulation conduit 12 leaves storage tank 20 and returns to pump 14 to be re-propelled to at least one of exhaust gas heat exchanger 16 or engine fluids heat exchanger 18.
In the preferred embodiment, where low temperature heating system for a hydrocarbon storage tank 10 is subject to expansion, exit valve 24 releases fluid from closed loop circulation conduit 12 into expansion tank 22. Inversely, in the preferred embodiment, where low temperature heating system for a hydrocarbon storage tank 10 is subject to contraction, inlet valve 28 introduces fluid into closed loop circulation conduit 12 from make up tank 26.
In this document, the word "compr:ising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements..
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (13)
1. A low temperature heating system for a hydrocarbon storage tank, comprising:
a storage tank;
several open face tubular helical coils disposed within the storage tank, each helical coil having an inlet end and an outlet end; and means for circulating heated heat transfer fluids through each the helical coils, whereby heat is transferred from the heat transfer fluids in the helical coils to liquids in the tank.
a storage tank;
several open face tubular helical coils disposed within the storage tank, each helical coil having an inlet end and an outlet end; and means for circulating heated heat transfer fluids through each the helical coils, whereby heat is transferred from the heat transfer fluids in the helical coils to liquids in the tank.
2. The low temperature heating system as defined in Claim 1, wherein the means for circulating the heated fluid through the helical coils includes:
at least one heat exchanger having a first inlet, a first outlet, a first fluid circulation path extending from the first inlet to the first outlet, a second inlet, a second outlet and a second fluid circulation path extending from the second inlet to the second outlet;
a closed loop circulation conduit connecting the outlet end of the at least one heat exchanger with the inlet end of each of the helical coils, and the outlet end of each of the helical coils to the first inlet of the at least one heat exchanger, such that heat transfer fluids are heated as they pass along the first fluid circulation path of the at least one heat exchanger;
a pump connected to the closed loop circulation conduit and adapted to circulate heat transfer fluids through the closed loop circulation conduit;
an engine;
an engine fluids conduit communicating with the second inlet, whereby hot engine fluids produced by the engine are passed along the second fluid path of the at least one heat exchanger, whereby a heat transfer occurs between the hot engine fluids passing along the second fluid path and the heat transfer fluids passing along the first fluid path.
at least one heat exchanger having a first inlet, a first outlet, a first fluid circulation path extending from the first inlet to the first outlet, a second inlet, a second outlet and a second fluid circulation path extending from the second inlet to the second outlet;
a closed loop circulation conduit connecting the outlet end of the at least one heat exchanger with the inlet end of each of the helical coils, and the outlet end of each of the helical coils to the first inlet of the at least one heat exchanger, such that heat transfer fluids are heated as they pass along the first fluid circulation path of the at least one heat exchanger;
a pump connected to the closed loop circulation conduit and adapted to circulate heat transfer fluids through the closed loop circulation conduit;
an engine;
an engine fluids conduit communicating with the second inlet, whereby hot engine fluids produced by the engine are passed along the second fluid path of the at least one heat exchanger, whereby a heat transfer occurs between the hot engine fluids passing along the second fluid path and the heat transfer fluids passing along the first fluid path.
3. The low temperature heating system as defined in Claim 2, wherein the engine fluid conduit carries exhaust gases from the engine and exhaust gases are vented to atmosphere downstream of the second outlet.
4. The low temperature heating system as defined in Claim 2, wherein the engine fluid conduit carries engine coolant and the engine coolant is returned to the engine downstream of the second outlet as part of a closed loop circulation system.
5. The low temperature heating system as defined in Claim 1, wherein the helical coils are disposed in a vertical orientation.
6. The low temperature heating system as defined in Claim 5, wherein the helical coils are positioned in the storage tank to extend upwardly from a hydrocarbon/water interface zone.
7. The low temperature heating system as defined in Claim 1, wherein each of the several helical coils has an inner coil and a concentric outer coil.
8. The low temperature heating system as defined in Claim 2, wherein the closed loop circulation conduit has an expansion tank adapted to receive excess heat transfer fluids from the closed loop circulation conduit resulting from expansion brought about by increased temperatures.
9. The low temperature heating system as defined in Claim 2, wherein the closed loop circulation conduit has a make up tank adapted to inject additional heat transfer fluids into the closed loop circulation conduit resulting from a contraction brought on by decreases in temperature.
10. The low temperature heating system as defined in Claim 1, wherein helical coils are configured in pairs.
11. The low temperature heating system as defined in Claim 4, wherein the engine has a radiator and a diverter valve is provided which selectively bypasses the radiator is the temperature of the coolant is below a pre-set level and diverts the coolant through the radiator if the temperature of the coolant is above the pre-set level.
12 12. A low temperature heating system for a hydrocarbon storage tank, comprising:
a storage tank;
several open face tubular helical coils disposed within the storage tank, each helical coil having an inlet end and an outlet end, the helical coils being disposed in a vertical orientation and positioned in the storage tank to extend upwardly from a hydrocarbon/water interface zone;
two sequential heat exchangers each of the sequential heat exchangers having a first inlet, a first outlet, a first fluid circulation path extending from the first inlet to the first outlet, a second inlet, a second outlet and a second fluid circulation path extending from the second inlet to the second outlet;
a closed loop circulation conduit connecting the first outlet of a first of the two sequential heat exchangers with the first inlet of a second of the at least to sequential heat exchangers and the first outlet of the second of the two sequential heat exchangers with the inlet end of each of the helical coils and the outlet end of each of the helical coils to the first inlet of the first of the two sequential heat exchangers, such that heat transfer liquid is heated as it passes along the first circulation path of each of the two sequential heat exchangers, the closed loop circulation conduit having an expansion tank adapted to receive excess heat transfer fluids from the closed loop circulation conduit resulting from expansion brought about by increased temperatures, the closed loop circulation conduit having a make up tank adapted to inject additional heat transfer fluid into the closed loop circulation conduit resulting from a contraction brought on by decreases in temperature;
a pump connected to the closed loop circulation conduit adapted to circulate the heat transfer liquid through the closed loop circulation conduit;
an engine;
a storage tank;
several open face tubular helical coils disposed within the storage tank, each helical coil having an inlet end and an outlet end, the helical coils being disposed in a vertical orientation and positioned in the storage tank to extend upwardly from a hydrocarbon/water interface zone;
two sequential heat exchangers each of the sequential heat exchangers having a first inlet, a first outlet, a first fluid circulation path extending from the first inlet to the first outlet, a second inlet, a second outlet and a second fluid circulation path extending from the second inlet to the second outlet;
a closed loop circulation conduit connecting the first outlet of a first of the two sequential heat exchangers with the first inlet of a second of the at least to sequential heat exchangers and the first outlet of the second of the two sequential heat exchangers with the inlet end of each of the helical coils and the outlet end of each of the helical coils to the first inlet of the first of the two sequential heat exchangers, such that heat transfer liquid is heated as it passes along the first circulation path of each of the two sequential heat exchangers, the closed loop circulation conduit having an expansion tank adapted to receive excess heat transfer fluids from the closed loop circulation conduit resulting from expansion brought about by increased temperatures, the closed loop circulation conduit having a make up tank adapted to inject additional heat transfer fluid into the closed loop circulation conduit resulting from a contraction brought on by decreases in temperature;
a pump connected to the closed loop circulation conduit adapted to circulate the heat transfer liquid through the closed loop circulation conduit;
an engine;
13 a first engine fluids conduit communicating with the second inlet of the first of the sequential heat exchangers, whereby hot exhaust gases produced by the engine are passed along the second fluid path of the first heat exchanger, whereby a heat transfer occurs between the hot exhaust gases passing along the second fluid path and heat transfer fluids passing along the first fluid path, the exhaust gases being vented to atmosphere downstream of the second outlet;
a second engine fluids conduit communicating with the second inlet of the second of the two sequential heat exchangers, whereby hot coolant produced by the engine is passed along the second fluid path of the second of the sequential heat exchangers, whereby a heat transfer occurs between the hot coolant passing along the second fluid path and heat transfer fluids passing along the first fluid path, the engine coolant being returned to the engine downstream of the second outlet as part of a closed loop circulation system.
a second engine fluids conduit communicating with the second inlet of the second of the two sequential heat exchangers, whereby hot coolant produced by the engine is passed along the second fluid path of the second of the sequential heat exchangers, whereby a heat transfer occurs between the hot coolant passing along the second fluid path and heat transfer fluids passing along the first fluid path, the engine coolant being returned to the engine downstream of the second outlet as part of a closed loop circulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2413819 CA2413819A1 (en) | 2002-12-10 | 2002-12-10 | Low temperature heating system for a hydrocarbon storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2413819 CA2413819A1 (en) | 2002-12-10 | 2002-12-10 | Low temperature heating system for a hydrocarbon storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2413819A1 true CA2413819A1 (en) | 2004-06-10 |
Family
ID=32477015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2413819 Abandoned CA2413819A1 (en) | 2002-12-10 | 2002-12-10 | Low temperature heating system for a hydrocarbon storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2413819A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150276325A1 (en) * | 2012-11-01 | 2015-10-01 | Skanska Sverige Ab | Energy storage |
| EP1944538A3 (en) * | 2007-01-15 | 2016-06-01 | Robert Bosch Gmbh | Hydraulic impulse attenuator |
| US9518787B2 (en) | 2012-11-01 | 2016-12-13 | Skanska Svergie Ab | Thermal energy storage system comprising a combined heating and cooling machine and a method for using the thermal energy storage system |
| US9823026B2 (en) | 2012-11-01 | 2017-11-21 | Skanska Sverige Ab | Thermal energy storage with an expansion space |
| CN108645253A (en) * | 2018-07-26 | 2018-10-12 | 江阴天田容器制造有限公司 | A kind of integral type heat-exchanger rig |
-
2002
- 2002-12-10 CA CA 2413819 patent/CA2413819A1/en not_active Abandoned
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1944538A3 (en) * | 2007-01-15 | 2016-06-01 | Robert Bosch Gmbh | Hydraulic impulse attenuator |
| US20150276325A1 (en) * | 2012-11-01 | 2015-10-01 | Skanska Sverige Ab | Energy storage |
| US9518787B2 (en) | 2012-11-01 | 2016-12-13 | Skanska Svergie Ab | Thermal energy storage system comprising a combined heating and cooling machine and a method for using the thermal energy storage system |
| US9657998B2 (en) | 2012-11-01 | 2017-05-23 | Skanska Sverige Ab | Method for operating an arrangement for storing thermal energy |
| US9791217B2 (en) * | 2012-11-01 | 2017-10-17 | Skanska Sverige Ab | Energy storage arrangement having tunnels configured as an inner helix and as an outer helix |
| US9823026B2 (en) | 2012-11-01 | 2017-11-21 | Skanska Sverige Ab | Thermal energy storage with an expansion space |
| CN108645253A (en) * | 2018-07-26 | 2018-10-12 | 江阴天田容器制造有限公司 | A kind of integral type heat-exchanger rig |
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