Device for controlling the radial profile of the temperature of a confined gas stream
AssigneeIfp Energies Nouvelles
InventorsChristophe Boyer, André Nicolle, Willi Nastoll, Robert Sanger
Life of this patent
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Abstract
This invention describes a new device for controlling the radial profile of the temperature of a confined gas stream that is designed to be used as a coolant in an exchanger that is located downstream from said device.
Claims11
Axisymmetrical device for controlling the temperature of a hot confined gas stream that is contained in an inside pipe (4) with a diameter Di that comprises:
- A cylindrical chamber (1) with a diameter De that surrounds the pipe with a diameter Di over a length L1,
- A convergent conical portion (2) with a length Lc that makes it possible to pass from the diameter De to diameter Ds that is strictly smaller than De,
- A cylindrical pipe (3) with a diameter Ds that extends over a length L2,
- At least one intake pipe (5) of a coolant with a diameter Dc that is located perpendicular to the section of the device and that makes it possible to feed coolant to an annular portion (6) that is between the outside cylindrical chamber (1) and the inside pipe (4), whereby the device adheres to the following proportions:
- L1/Di between 0.5 and 2
- Lc/Di between 0.5 and 5
- L2/Di between 1.5 and 10
- Dc/Di between 0.1 and 0.4
- De/Di between 1 and 5.
A process for cooling a hot confined gas stream by providing an axisymmetrical device for controlling the temperature of a hot confined gas stream that is contained in an inside pipe (4) with a diameter Di that comprises:
- A cylindrical chamber (1) with a diameter De that surrounds the pipe with a diameter Di over a length L1,
- A convergent conical portion (2) with a length Lc that makes it possible to pass from the diameter De to diameter Ds that is strictly smaller than De,
- A cylindrical pipe (3) with a diameter Ds that extends over a length L2,
- At least one intake pipe (5) for a coolant with a diameter Dc that is located perpendicular to the section of the device and that makes it possible to feed the coolant to an annular portion (6) that is between the outside cylindrical chamber (1) and the inside pipe (4), whereby the device adheres to the following proportions:
- L1/Di between 0.5 and 2
- Lc/Di between 0.5 and 5
- L2/Di between 1.5 and 10
- Dc/Di between 0.1 and 0.4
- De/Di between 1 and 5
- and injecting the coolant at a mean speed of between 5 m/s and 80 m/s into said intake.
A process for cooling a hot confined gas stream by providing an axisymmetrical device for controlling the temperature of a hot confined gas stream that is contained in an inside pipe (4) with a diameter Di that comprises:
- A cylindrical chamber (1) with a diameter De that surrounds the pipe with a diameter Di over a length L1,
- A convergent conical portion (2) with a length Lc that makes it possible to pass from the diameter De to diameter Ds that is strictly smaller than De,
- A cylindrical pipe (3) with a diameter Ds that extends over a length L2,
- At least one intake pipe (5) for a coolant with a diameter Dc that is located perpendicular to the section of the device and feeding the coolant to an annular portion (6) that is between the outside cylindrical chamber (1) and the inside pipe (4), whereby the device adheres to the following proportions:
- L1/Di between 0.5 and 2
- Lc/Di between 0.5 and 5
- L2/Di between 1.5 and 10
- Dc/Di between 0.1 and 0.4
- De/Di between 1 and 5
- wherein the coolant is air at ambient temperature, rotated in a plane that is perpendicular to the axis of the device.
A process for cooling a hot confined gas stream by providing an axisymmetrical device for controlling the temperature of a hot confined gas stream that is contained in an inside pipe (4) with a diameter Di that comprises:
- A cylindrical chamber (1) with a diameter De that surrounds the pipe with a diameter Di over a length L1,
- A convergent conical portion (2) with a length Lc that makes it possible to pass from the diameter De to diameter Ds that is strictly smaller than De,
- A cylindrical pipe (3) with a diameter Ds that extends over a length L2,
- At least one intake pipe (5) for a coolant with a diameter Dc that is located perpendicular to the section of the device and feeding said coolant to an annular portion (6) that is between the outside cylindrical chamber (1) and the inside pipe (4), whereby the device adheres to the following proportions:
- L1/Di between 0.5 and 2
- Lc/Di between 0.5 and 5
- L2/Di between 1.5 and 10
- Dc/Di between 0.1 and 0.4
- De/Di between 1 and 5
- wherein the confined gas stream at the conical portion (2) of the device has a wall zone inside of which the temperature is between 200° C. and 500° C.
A process for cooling a hot confined gas stream by providing an axisymmetrical device for controlling the temperature of a hot confined gas stream that is contained in an inside pipe (4) with a diameter Di that comprises:
- A cylindrical chamber (1) with a diameter De that surrounds the pipe with a diameter Di over a length L1,
- A convergent conical portion (2) with a length Lc that makes it possible to pass from the diameter De to diameter Ds that is strictly smaller than De,
- A cylindrical pipe (3) with a diameter Ds that extends over a length L2,
- At least one intake pipe (5) of a coolant with a diameter Dc that is located perpendicular to the section of the device and feeding the coolant to an annular portion (6) that is between the outside cylindrical chamber (1) and the inside pipe (4), whereby the device adheres to the following proportions:
- L1/Di between 0.5 and 2
- Lc/Di between 0.5 and 5
- L2/Di between 1.5 and 10
- Dc/Di between 0.1 and 0.4
- De/Di between 1 and 5
- in which the confined gas stream at the output of the device has a radial temperature profile exhibiting a temperature difference between the temperature at the center and the temperature at the edges that is less than 35% of the temperature at the edges.
Dependencies are inferred from the claim text.