CA2202111A1 - Gas powered heating system - Google Patents
Gas powered heating systemInfo
- Publication number
- CA2202111A1 CA2202111A1 CA002202111A CA2202111A CA2202111A1 CA 2202111 A1 CA2202111 A1 CA 2202111A1 CA 002202111 A CA002202111 A CA 002202111A CA 2202111 A CA2202111 A CA 2202111A CA 2202111 A1 CA2202111 A1 CA 2202111A1
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- heat
- heating system
- heater
- gas
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/02—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating
- F04F1/04—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating generated by vaporising and condensing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/32—Heating of pipes or pipe systems using hot fluids
Abstract
A heating system for providing heat energy to prevent the freezing of tanks pipes and the like is operated without the need for a prime mover or a supply of electrical energy. The heating system uses the energy of a compressed gas in a gas lift pump to circulate a heat transfer fluid from a heater to a heat exchanger. The pressurized gas may be a fuel gas which after use in the pump can optionally be delivered as fuel to the heater.
Description
This invention relates to a new or improved heating system and method which are particularly suitable for use at locations where a ready supply of fuel gas is available. The heating system and process can be operated without having to rely upon a prime mover or a supply of electricity.
In many situations, and in particular at the production wells of natural gas fields there is a need to store supplies of water and other fluids such as oil and diesel fuel. In cold climates it is desirable to locate the tanks for such liquids underground to protect their contents from freezing. However due to recent ERCB/AEUB environmental regulations, underground produced water tanks have 10 become prohibitively expensive to install, monitor for leakage, and reclaim or remove. Above ground tanks are obviously much easier to install, monitor, repair, and move, but they and their associated piping are subject to freezing during cold winter weather with the result that at a gas well site, the separator which separates the gas from liquids may malfunction and carry over liquids into the gas pipeline, or shutdown on high level. Outdoor wet fuel gas piping can also cause freezing in regulators and instruments, again causing shutdowns, lost production and increased operating expenses.
The present invention provides a heating system comprising: a fluid flow circuit that is connected to circulate a heat transfer fluid between (a) a heat 20 generating location whereat said fluid is heated; and (b) a heat yielding location whereat heat is extracted from said fluid; said system including a fluid pump for effecting circulation of the heat transfer fluid, said fluid pump configured to be energized by the pressure energy of a pressurized gas supply.
Preferably the pressurized gas supply is a fuel gas utilized in a fluid lift pump to effect circulation of the heat transfer fluid, and after such utilization fed to a heater such as a flameless catalytic heater to effect heating of the heat transfer fluid at the heat generating location. The gas supply need not be at anextremely high pressure, but on the contrary may be at a relatively low pressureprovided that sufficient energy can be obtained from expansion of the gas to drive the pump that circulates the heat exchange fluid. Depending upon the quantity ofheat transfer fluid to be circulated per unit time, the energy requirement is not great, since a relatively small pressure head will suffice to drive the circulation, and indeed the fluid circulation will be assisted by convection forces generated by changes in fluid density in the heater and in the heat exchanger respectively.
From another aspect the invention provides a method of applying heat to a liquid in a fluid container to maintain such liquid at a temperature above a predetermined threshold temperature, said method comprising: providing a fluidflow circuit which includes a heat generating location where heat is supplied tosaid heat transfer fluid, and a heat exchanger within said container whereat heat is transferred from said heat transfer fluid to the liquid in said container; and circulating said heat transfer fluid within said fluid flow circuit, said circulating being powered by the pressure energy of a pressurized gas supply.
To overcome the problems discussed above in relation to producing natural gas well sites which are subject to freezing problems, the basic solution is to deliver heat into the problem areas, and to insulate the exterior of the pipes or tanks to ensure that the inside temperature is maintained above freezing. This was commonly done hitherto utilizing electrical heating elements and tracing wires.
Where electrical power is not available or not economical, the heating system of the present invention can be employed utilizing the pressure and calorific value of the fuel gas such as natural gas or propane to deliver heat inside insulated piping or insulated tanks, the heat being transferred to the liquids by suitable heat exchangers. Typically this will require a fluid flow circuit in which relatively large volumes of heat transfer fluids such as glycol have to be circulated continuously.
In accordance with the invention it is preferred to effect circulation of the heat transfer fluid by means of a Gas Induced Fluid Transfer (G.l.F.T.) pump which is sold by Opsco'92 Industries Ltd., which can utilize fuel gas pressurized at relatively low pressures to induce the desired flow rates of the glycol heat transfer 10 fluid. For example it is possible to effect a flow rate of 30 U.S. gallons per hour with a consumption of natural gas of less than about 2.5 standard cubic feet per hour. All of the drive gas passing through the GIFT pump can be reused in the heater. To this extent the fluid circulation energy is essentially "free". The gas induced fluid transfer pump disclosed herein has no moving parts and is completely maintenance free. Once started it can run continuously without any operator attention.
The heater may suitably comprise a building heater such as the one sold under the name Catadyne which is in common use in well site facilities and which produces infrared radiant energy via a catalytic reaction with no flame. The 20 heat transfer fluid can be circulated through a thinned heat exchanger which is exposed to the energy of the heater. If this arrangement is installed indoors, then excess heat from the heater which is not taken up by the heat transfer fluid is not wasted, but helps to warm the building interior.
The invention will further be described, by way of example only, with reference to the accompanying drawings wherein Figure 1 is a somewhat schematic view of a well site utility tank heating system incorporating the invention; and Figures 2a, 2b and 2c are schematic illustrations of fluid pumps which can be utilized with the system, Figure 2a showing the simplest basic prototype pump design, while 2b and 2c show some other variations.
The heating system shown in Figure 1 includes a heat exchanger 11 located within a water storage tank 12 and connected in circuit to receive heat exchange liquid from a heater 13 through a delivery line 14. A first return line part 15 is connected from the heat exchanger 11 to a circulating pump 17. From the circulating pump 17 the liquid is passed to a reservoir 20 via a line 29 and a second return line part 16 is connected from the reservoir 20 to the heater 13 forming a closed circuit for the flow of heat exchange fluid utilized to transfer heat from the heater 13 to the water in the tank 12.
Any suitable heat exchange liquid can be used, and in the example illustrated the liquid used is a glycol-water mix which is preferred because it has a relatively high specific heat, has good heat transfer properties, and will not freeze except at extremely low temperatures.
Within the heater 13 the glycol is circulated through a coil or sinuous 20 tube bank 18 which is exposed to absorb heat created in a heating element 19, the latter in the example illustrated comprising a Catadyne (Trademark) catalytic building heater. The Catadyne heater produces infrared radiant energy without flame and has proven to be reliable and safe in use. Where the heater 13 is mounted indoors, any generated heat that is not absorbed in the coil 18 can be utilized to warm the interior of the building.
The circulation pump 17 is powered by pressurized propane or natural gas from a supply 22 delivered through a line 23 and a valve 24 to the circulation pump 17. Make-up gas from the same supply 22 can also pass from the line 23 through a regulator valve 25 to a line 26 through which gas is delivered to the heating element 19, in order to provide sufficient fuel gas to the heater regardless of the pump demand.
Gas supplied to the circulating pump 17 by way of the valve 24 leaves the pump together with the now-lifted glycol, and both are delivered into the top of reservoir 20 through the line 29. In the reservoir 20 the gas is separated from the liquid under the influence of gravity and is delivered through a line 30 for passage to the heating element 19 for use as fuel therein. A pressure release valve 31 communicates with the interior of the reservoir 20 to relieve any excess pressure that may develop therein.
The gas introduced into the pump 17 combines with the cold liquid returning at low elevation. The combined gas and liquid are lifted to a higher elevation into the top of reservoir 20 where they are separated from each other as previously mentioned. The cold glycol mix is now free to flow through the rest of the liquid circuit by virtue of the pressure head produced by its change in 20 elevation. In other words, the glycol mix in the reservoir exerts a higher static pressure on the reservoir bottom outlet line 16 than that found at the pump suction line 15. From the reservoir the cold glycol mix reaches the coil 18 and is heated as it passes through. From there, the liquid flows out line 14 to the heat exchanger 11. As it passes through the exchanger, heat is lost from the glycol mix transfer fluid and gained by the tank contents 12. Alternatively, the tank may be replaced by any other device or piping system requiring heat. From the exchanger 11, the cold liquid flows back to the pump suction via line 15, completing the circuit. It is evident that the flow is also assisted by the natural convection currents which develop as a result of the temperature gradient between the heating coil 18 and the tank exchanger 11.
As mentioned, the pump 17 is of a type that does not require a motor for its operation, but rather is one that can be powered simply by the pressure of a gas, and one simplified pump 17a is schematically illustrated in Figure 2a as 10 comprising an open top column 35 having at its lower end (Elevation A) an inlet port 36 connected to a supply of liquid under hydrostatic head (as from the line 15) such that the liquid will find a level 38 (Elevation C) in the column 35 according to the hydrostatic head. Above the lower port 36 at Elevation B is a second port 40 to which gas under pressure regulated by the valve 24 can be delivered. It will be appreciated that gas injected through the port 40 will tend to move upwards through the column and to raise the liquid which lies above it in the column. It will be understood that as gas rises in the column 35 slugs of liquid above it are lifted vertically to a height (Elevation D) above the point of gas introduction (depending on the column diameter, liquid velocity, gas pressure, gas 20 volume, hydrostatic head etc.) which results in a pumping action, and the gas can be supplied more or less continuously.
The alternative pump 17b shown in Figure 2b is modified from the one shown in Figure 2a by the inclusion of a piston 41 within the column above the second port, the piston 41 being slidable vertically within the column. In this embodiment the pressurized gas is not introduced continuously through the port 40, but rather is introduced in pulses of a given volume, pressure, and rate. The piston 41 is forced to move upwardly when a charge of compressed gas is introduced beneath it, so that the liquid above the piston is pumped upwardly.
When the gas supply is cut off after a predetermined time, gas in the column beneath the piston can leak upwardly past it, and the piston will subside to its starting position just above the port 40, whereafter further charge of gas can be admitted. The piston can take various forms: as illustrated in Figure 2b, the piston 41a being solid and loose fitting within the column 35; the piston 41b being 10 of inverted cup shape and having an orifice 42 at its upper end through which gas and liquid can pass upwardly as the piston returns to its starting position; and at 41c a loose fitting piston which includes a flexible seal 43 past which gas can escape upwardly to allow the piston to settle back to its starting position.
In the other alternative gas lift pump illustrated in Figure 2c the column 35 is branched, the branch 47c being connected to the gas supply which is delivered under regulated pressure and volume in pulses under the control of a timer (not shown). When a pulse of pressurized gas is delivered it will force the liquid from the branch 40c into the column 35. A check valve 36a provided in the liquid supply prevents backflow of liquid so that the displaced liquid is forced 20 upwardly in the column 35 in a pumping action. When the gas pulse is dissipated, a fresh supply of liquid will re-enter the pump through the check valve 36a rising again to the level 38 both in the column 35 and in the branch 40c.
While presently preferred embodiments of the invention are described above in relation to the accompanying drawings, it will be appreciated that the invention is capable of numerous modifications in the details thereof, and all such are intended to be comprehended within the scope of the attached claims.
In many situations, and in particular at the production wells of natural gas fields there is a need to store supplies of water and other fluids such as oil and diesel fuel. In cold climates it is desirable to locate the tanks for such liquids underground to protect their contents from freezing. However due to recent ERCB/AEUB environmental regulations, underground produced water tanks have 10 become prohibitively expensive to install, monitor for leakage, and reclaim or remove. Above ground tanks are obviously much easier to install, monitor, repair, and move, but they and their associated piping are subject to freezing during cold winter weather with the result that at a gas well site, the separator which separates the gas from liquids may malfunction and carry over liquids into the gas pipeline, or shutdown on high level. Outdoor wet fuel gas piping can also cause freezing in regulators and instruments, again causing shutdowns, lost production and increased operating expenses.
The present invention provides a heating system comprising: a fluid flow circuit that is connected to circulate a heat transfer fluid between (a) a heat 20 generating location whereat said fluid is heated; and (b) a heat yielding location whereat heat is extracted from said fluid; said system including a fluid pump for effecting circulation of the heat transfer fluid, said fluid pump configured to be energized by the pressure energy of a pressurized gas supply.
Preferably the pressurized gas supply is a fuel gas utilized in a fluid lift pump to effect circulation of the heat transfer fluid, and after such utilization fed to a heater such as a flameless catalytic heater to effect heating of the heat transfer fluid at the heat generating location. The gas supply need not be at anextremely high pressure, but on the contrary may be at a relatively low pressureprovided that sufficient energy can be obtained from expansion of the gas to drive the pump that circulates the heat exchange fluid. Depending upon the quantity ofheat transfer fluid to be circulated per unit time, the energy requirement is not great, since a relatively small pressure head will suffice to drive the circulation, and indeed the fluid circulation will be assisted by convection forces generated by changes in fluid density in the heater and in the heat exchanger respectively.
From another aspect the invention provides a method of applying heat to a liquid in a fluid container to maintain such liquid at a temperature above a predetermined threshold temperature, said method comprising: providing a fluidflow circuit which includes a heat generating location where heat is supplied tosaid heat transfer fluid, and a heat exchanger within said container whereat heat is transferred from said heat transfer fluid to the liquid in said container; and circulating said heat transfer fluid within said fluid flow circuit, said circulating being powered by the pressure energy of a pressurized gas supply.
To overcome the problems discussed above in relation to producing natural gas well sites which are subject to freezing problems, the basic solution is to deliver heat into the problem areas, and to insulate the exterior of the pipes or tanks to ensure that the inside temperature is maintained above freezing. This was commonly done hitherto utilizing electrical heating elements and tracing wires.
Where electrical power is not available or not economical, the heating system of the present invention can be employed utilizing the pressure and calorific value of the fuel gas such as natural gas or propane to deliver heat inside insulated piping or insulated tanks, the heat being transferred to the liquids by suitable heat exchangers. Typically this will require a fluid flow circuit in which relatively large volumes of heat transfer fluids such as glycol have to be circulated continuously.
In accordance with the invention it is preferred to effect circulation of the heat transfer fluid by means of a Gas Induced Fluid Transfer (G.l.F.T.) pump which is sold by Opsco'92 Industries Ltd., which can utilize fuel gas pressurized at relatively low pressures to induce the desired flow rates of the glycol heat transfer 10 fluid. For example it is possible to effect a flow rate of 30 U.S. gallons per hour with a consumption of natural gas of less than about 2.5 standard cubic feet per hour. All of the drive gas passing through the GIFT pump can be reused in the heater. To this extent the fluid circulation energy is essentially "free". The gas induced fluid transfer pump disclosed herein has no moving parts and is completely maintenance free. Once started it can run continuously without any operator attention.
The heater may suitably comprise a building heater such as the one sold under the name Catadyne which is in common use in well site facilities and which produces infrared radiant energy via a catalytic reaction with no flame. The 20 heat transfer fluid can be circulated through a thinned heat exchanger which is exposed to the energy of the heater. If this arrangement is installed indoors, then excess heat from the heater which is not taken up by the heat transfer fluid is not wasted, but helps to warm the building interior.
The invention will further be described, by way of example only, with reference to the accompanying drawings wherein Figure 1 is a somewhat schematic view of a well site utility tank heating system incorporating the invention; and Figures 2a, 2b and 2c are schematic illustrations of fluid pumps which can be utilized with the system, Figure 2a showing the simplest basic prototype pump design, while 2b and 2c show some other variations.
The heating system shown in Figure 1 includes a heat exchanger 11 located within a water storage tank 12 and connected in circuit to receive heat exchange liquid from a heater 13 through a delivery line 14. A first return line part 15 is connected from the heat exchanger 11 to a circulating pump 17. From the circulating pump 17 the liquid is passed to a reservoir 20 via a line 29 and a second return line part 16 is connected from the reservoir 20 to the heater 13 forming a closed circuit for the flow of heat exchange fluid utilized to transfer heat from the heater 13 to the water in the tank 12.
Any suitable heat exchange liquid can be used, and in the example illustrated the liquid used is a glycol-water mix which is preferred because it has a relatively high specific heat, has good heat transfer properties, and will not freeze except at extremely low temperatures.
Within the heater 13 the glycol is circulated through a coil or sinuous 20 tube bank 18 which is exposed to absorb heat created in a heating element 19, the latter in the example illustrated comprising a Catadyne (Trademark) catalytic building heater. The Catadyne heater produces infrared radiant energy without flame and has proven to be reliable and safe in use. Where the heater 13 is mounted indoors, any generated heat that is not absorbed in the coil 18 can be utilized to warm the interior of the building.
The circulation pump 17 is powered by pressurized propane or natural gas from a supply 22 delivered through a line 23 and a valve 24 to the circulation pump 17. Make-up gas from the same supply 22 can also pass from the line 23 through a regulator valve 25 to a line 26 through which gas is delivered to the heating element 19, in order to provide sufficient fuel gas to the heater regardless of the pump demand.
Gas supplied to the circulating pump 17 by way of the valve 24 leaves the pump together with the now-lifted glycol, and both are delivered into the top of reservoir 20 through the line 29. In the reservoir 20 the gas is separated from the liquid under the influence of gravity and is delivered through a line 30 for passage to the heating element 19 for use as fuel therein. A pressure release valve 31 communicates with the interior of the reservoir 20 to relieve any excess pressure that may develop therein.
The gas introduced into the pump 17 combines with the cold liquid returning at low elevation. The combined gas and liquid are lifted to a higher elevation into the top of reservoir 20 where they are separated from each other as previously mentioned. The cold glycol mix is now free to flow through the rest of the liquid circuit by virtue of the pressure head produced by its change in 20 elevation. In other words, the glycol mix in the reservoir exerts a higher static pressure on the reservoir bottom outlet line 16 than that found at the pump suction line 15. From the reservoir the cold glycol mix reaches the coil 18 and is heated as it passes through. From there, the liquid flows out line 14 to the heat exchanger 11. As it passes through the exchanger, heat is lost from the glycol mix transfer fluid and gained by the tank contents 12. Alternatively, the tank may be replaced by any other device or piping system requiring heat. From the exchanger 11, the cold liquid flows back to the pump suction via line 15, completing the circuit. It is evident that the flow is also assisted by the natural convection currents which develop as a result of the temperature gradient between the heating coil 18 and the tank exchanger 11.
As mentioned, the pump 17 is of a type that does not require a motor for its operation, but rather is one that can be powered simply by the pressure of a gas, and one simplified pump 17a is schematically illustrated in Figure 2a as 10 comprising an open top column 35 having at its lower end (Elevation A) an inlet port 36 connected to a supply of liquid under hydrostatic head (as from the line 15) such that the liquid will find a level 38 (Elevation C) in the column 35 according to the hydrostatic head. Above the lower port 36 at Elevation B is a second port 40 to which gas under pressure regulated by the valve 24 can be delivered. It will be appreciated that gas injected through the port 40 will tend to move upwards through the column and to raise the liquid which lies above it in the column. It will be understood that as gas rises in the column 35 slugs of liquid above it are lifted vertically to a height (Elevation D) above the point of gas introduction (depending on the column diameter, liquid velocity, gas pressure, gas 20 volume, hydrostatic head etc.) which results in a pumping action, and the gas can be supplied more or less continuously.
The alternative pump 17b shown in Figure 2b is modified from the one shown in Figure 2a by the inclusion of a piston 41 within the column above the second port, the piston 41 being slidable vertically within the column. In this embodiment the pressurized gas is not introduced continuously through the port 40, but rather is introduced in pulses of a given volume, pressure, and rate. The piston 41 is forced to move upwardly when a charge of compressed gas is introduced beneath it, so that the liquid above the piston is pumped upwardly.
When the gas supply is cut off after a predetermined time, gas in the column beneath the piston can leak upwardly past it, and the piston will subside to its starting position just above the port 40, whereafter further charge of gas can be admitted. The piston can take various forms: as illustrated in Figure 2b, the piston 41a being solid and loose fitting within the column 35; the piston 41b being 10 of inverted cup shape and having an orifice 42 at its upper end through which gas and liquid can pass upwardly as the piston returns to its starting position; and at 41c a loose fitting piston which includes a flexible seal 43 past which gas can escape upwardly to allow the piston to settle back to its starting position.
In the other alternative gas lift pump illustrated in Figure 2c the column 35 is branched, the branch 47c being connected to the gas supply which is delivered under regulated pressure and volume in pulses under the control of a timer (not shown). When a pulse of pressurized gas is delivered it will force the liquid from the branch 40c into the column 35. A check valve 36a provided in the liquid supply prevents backflow of liquid so that the displaced liquid is forced 20 upwardly in the column 35 in a pumping action. When the gas pulse is dissipated, a fresh supply of liquid will re-enter the pump through the check valve 36a rising again to the level 38 both in the column 35 and in the branch 40c.
While presently preferred embodiments of the invention are described above in relation to the accompanying drawings, it will be appreciated that the invention is capable of numerous modifications in the details thereof, and all such are intended to be comprehended within the scope of the attached claims.
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A heating system comprising:
a fluid flow circuit that is connected to circulate a heat transfer fluid between (a) a heat generating location whereat said fluid is heated; and (b) a heat yielding location whereat heat is extracted from said fluid;
said system including a fluid pump for effecting circulation of the heat transfer fluid, said fluid pump configured to be energized by the pressure energy of a pressurized gas supply.
a fluid flow circuit that is connected to circulate a heat transfer fluid between (a) a heat generating location whereat said fluid is heated; and (b) a heat yielding location whereat heat is extracted from said fluid;
said system including a fluid pump for effecting circulation of the heat transfer fluid, said fluid pump configured to be energized by the pressure energy of a pressurized gas supply.
2. A heating system as claimed in claim 1 wherein said fluid pump is a gas powered fluid lift pump.
3. A heating system as claimed in claim 1 or claim 2 wherein said heat generating location comprises a gas fuelled heater and said pressurized gas supply is a fuel gas which is also delivered to said heater.
4. A heating system as claimed in claim 2 wherein said heat generating location comprises a gas fuelled heater, and said pressurized gas supply is a fuel gas, the fuel gas utilized in said lift pump being delivered therefrom for combustion in said heater.
5. A heating system as claimed in claim 3 or claim 4 wherein said heater is a flameless catalytic heater.
6. A heating system as claimed in any one of claims 3 to 5 wherein said pressurized gas supply is natural gas or propane.
7. A heating system as claimed in any one of claims 1 to 6 wherein said heat yielding location is within, or in close contact with the exterior of, a fluid container.
8. A heating system as claimed in claim 7 wherein said fluid container is a fluid conduit or a fluid storage tank which contains, or is in close contact with, a heat exchanger forming part of said fluid flow circuit.
9. A method of applying heat to a liquid in a fluid container to maintain such liquid at a temperature above a predetermined threshold temperature, said method comprising:
providing a fluid flow circuit which includes a heat generating location where heat is supplied to said heat transfer fluid, and a heat exchanger within said container whereat heat is transferred from said heat transfer fluid to the liquid in said container; and circulating said heat transfer fluid within said fluid flow circuit, said circulating being powered by the pressure energy of a pressurized gas supply.
providing a fluid flow circuit which includes a heat generating location where heat is supplied to said heat transfer fluid, and a heat exchanger within said container whereat heat is transferred from said heat transfer fluid to the liquid in said container; and circulating said heat transfer fluid within said fluid flow circuit, said circulating being powered by the pressure energy of a pressurized gas supply.
10. A method as claimed in claim 9 comprising utilizing as said pressurized gas supply a fuel gas, which after use for circulating is delivered to a heater where it is consumed to provide heat to said heat transfer fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002202111A CA2202111A1 (en) | 1997-04-08 | 1997-04-08 | Gas powered heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002202111A CA2202111A1 (en) | 1997-04-08 | 1997-04-08 | Gas powered heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2202111A1 true CA2202111A1 (en) | 1998-10-08 |
Family
ID=4160368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002202111A Abandoned CA2202111A1 (en) | 1997-04-08 | 1997-04-08 | Gas powered heating system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2202111A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002037020A1 (en) * | 2000-10-31 | 2002-05-10 | Cora Marguerite Mcleod | Device for preventing pipeline freezing |
| CN103147890A (en) * | 2013-03-20 | 2013-06-12 | 勾昌羽 | Anti-explosion oil supply system for pneumatic oil tank |
| CN108591665A (en) * | 2018-06-11 | 2018-09-28 | 淄博环能海臣环保技术服务有限公司 | A kind of electric heating steel pipe complex heat-preservation plastic cement pipe device |
| CN112728272A (en) * | 2020-12-23 | 2021-04-30 | 胡艳梅 | Gas pipeline protection device based on air pressure |
| CN113048400A (en) * | 2021-03-12 | 2021-06-29 | 上海晟颢信息科技有限公司 | Indirect gas pressure regulator commanding device |
| CN114811247A (en) * | 2022-04-21 | 2022-07-29 | 中国电建集团中南勘测设计研究院有限公司 | Molten salt pipeline heating unit, device and method |
-
1997
- 1997-04-08 CA CA002202111A patent/CA2202111A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002037020A1 (en) * | 2000-10-31 | 2002-05-10 | Cora Marguerite Mcleod | Device for preventing pipeline freezing |
| CN103147890A (en) * | 2013-03-20 | 2013-06-12 | 勾昌羽 | Anti-explosion oil supply system for pneumatic oil tank |
| CN108591665A (en) * | 2018-06-11 | 2018-09-28 | 淄博环能海臣环保技术服务有限公司 | A kind of electric heating steel pipe complex heat-preservation plastic cement pipe device |
| CN112728272A (en) * | 2020-12-23 | 2021-04-30 | 胡艳梅 | Gas pipeline protection device based on air pressure |
| CN113048400A (en) * | 2021-03-12 | 2021-06-29 | 上海晟颢信息科技有限公司 | Indirect gas pressure regulator commanding device |
| CN114811247A (en) * | 2022-04-21 | 2022-07-29 | 中国电建集团中南勘测设计研究院有限公司 | Molten salt pipeline heating unit, device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |