EP0420768A1 - Mittel zum Zuführen von gasförmigem Brennstoff bei einem Gerät, das die Verbrennung dieses in flüssigem Zustand gespeicherten Gases verwendet - Google Patents

Mittel zum Zuführen von gasförmigem Brennstoff bei einem Gerät, das die Verbrennung dieses in flüssigem Zustand gespeicherten Gases verwendet Download PDF

Info

Publication number: EP0420768A1
Authority: EP; European Patent Office
Prior art keywords: fuel; evaporator; flow; burner; flow regulator
Prior art date: 1989-09-21
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.): Granted

Application number

EP90420390A

Other languages

English (en)

French (fr)

Other versions

EP0420768B1 (de

Inventor

René Frigière

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Feudor SA

Original Assignee

Feudor SA

Priority date (The priority date 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 date listed.)

1989-09-21

Filing date

1990-08-29

Publication date

1991-04-03

1990-08-29 Application filed by Feudor SA filed Critical Feudor SA

1990-08-29 Priority to AT90420390T priority Critical patent/ATE73219T1/de

1991-04-03 Publication of EP0420768A1 publication Critical patent/EP0420768A1/de

1992-03-04 Application granted granted Critical

1992-03-04 Publication of EP0420768B1 publication Critical patent/EP0420768B1/de

2010-08-29 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas

Definitions

the present invention relates to means for supplying gaseous fuel to an apparatus using the combustion of this gas stored in the liquid phase.
the purpose of the regulator / evaporator which generally consists of a porous mass, the permeability of which determines the gas flow, is intended not only to guarantee the gaseous state of the fuel arriving at the burner, but also to limit the flow to a value such that combustion generates, in the heat distribution member, an average temperature between two limit values, one lower corresponding to the operating threshold of the device and the other higher above which this operation would be dangerous.
Thermal phenomena are generally relatively slow to establish and stabilize, mainly due to the thermal inertia of the constituent elements of the heat distribution member, each of which has a high specific heat as well as due to the importance of heat losses by convection and conduction.
the present invention aims to remedy this drawback by allowing a rapid rise in temperature of the heat distribution member without, however, resulting in an increase in the normal operating temperature.
the flow regulator / evaporator constituted by at least one porous mass disposed between the tank in which the fuel is stored in the liquid phase and the burner with which is associated ignition device which is intended to produce the fuel mixture in the gas phase / combustion air supplying a flame and a heat distribution member maintained by the flame at a temperature between two limit values, one of operating threshold and the other safety, a closing / opening valve, being arranged upstream of the burner on the one hand
the flow regulator / evaporator consists of two porous masses whose permeabilities are such that the sum of the pressure losses that '' they generate is equal to the pressure drop corresponding to the desired flow rate for normal operation of the device and which are separated from each other by a recondensation chamber whose volume corresponds to the quantity of fuel necessary for the heat distribution
the recondensation chamber is provided with means making it possible to adjust its volume as a function of the calorie requirements of the heat distribution member in order to reach its normal operating temperature.
all the elements making up the flow regulator / evaporator are inserted into the wall of the fuel tank.
the apparatus of FIG. 1 is of the type comprising a tank 2 in which the gaseous fuel is stored in the liquid phase, a burner 3 intended to receive the fuel in the gaseous phase coming from the tank 2 and to mix it with combustion air to supply a flame 4 or any other form of combustion of this gas near which a heat distribution member 5 is arranged.
a flow regulator / evaporator 6 whose presence is intended not only to guarantee the passage into the gas phase of the fuel coming from the tank 2, before it reaches the burner 3 , but also to limit the gas flow which feeds the flame 4 to a value between two limit values, one lower of which corresponds to the operating threshold of the device and the other of which constitutes a safety limit value beyond which this operation would be dangerous.
a valve 11 is provided between the flow regulator / evaporator 6 and the burner 3, making it possible to extinguish the flame 4 by cutting off the flow of fuel in the gaseous phase.
the flow regulator / evaporator 6 of the supply means consists of two porous masses 6a, 6b arranged one after the other with care, between them, a chamber 7 called the recondensation chamber.
the two porous masses 6a and 6b are chosen with their own porosity such that the sum of the pressure losses they generate is equal to the pressure drop which corresponds to the gas flow rate itself corresponding to an average temperature of the heat distributing member 5 comprised between the two aforementioned limit values.
the separation into two independent porous masses 6a, 6b of the flow regulator / evaporator therefore has no effect on the normal operation of the device.
this separation necessarily has the effect that the porous mass 6b located downstream from the other has a permeability greater than the sum of the permeabilities of the two masses 6a, 6b, that which the flow regulator / evaporator should have if was not split in two.
the quantity of fuel stored in the recondensation chamber 7 must not exceed the quantity necessary for raising the temperature to the heat distribution member up to a value below the safety limit temperature.
the volume of the recondensation chamber 7 is therefore determined by this necessary quantity of fuel, but it is advantageously adjustable.
the time necessary for the flow, through the second porous mass 6b, of the quantity of fuel stored in the recondensation chamber 7 and which is a function of the permeability of the porous mass 6b, determines the time necessary for the heat distribution member 5, so that it reaches its normal operating temperature.
FIG. 2 shows two curves, one 8, illustrating the operation of gaseous fuel supply means of a conventional type and the other 9, illustrating the operation of the gaseous fuel means according to the invention.
the times are plotted on the abscissa and the temperatures on the ordinate.
the two curves 8 and 9 correspond to flow rates of normal operation G0 making it possible to maintain, during this normal operation, the heat distribution member 5 at an average temperature T0 situated between the minimum temperature TMini of the device operating threshold and the maximum temperature TMaxi above which the operation of this device would be dangerous.
Curve 8 which illustrates the operation of supply means corresponding to a constant flow rate, not preceded by a transient regime of accelerated flow rate, shows that it takes a time t2 for the heat distribution member to reach a temperature T1, while curve 9, corresponding to an operation whose normal steady state is preceded by an accelerated speed regime, shows that it takes a time t1 to reach this same temperature T1.
the comparative examination of curves 8 and 9 further shows that the time t1 is substantially half the time t2.
the recondensation chamber 7 In steady state, that is to say after the transient state, the recondensation chamber 7 is filled with fuel in the gaseous state and at an intermediate pressure between the vapor pressure of the gas at the temperature of the device and atmospheric pressure, the porous mass 6a, of the flow regulator / evaporator 6, arranged upstream ensuring a flow exclusively in the gas phase of the fuel.
This intermediate pressure depends on the respective values of the permeabilities of two porous masses 6a and 6b of the flow regulator / evaporator 6.
the recondensation chamber When stopped, that is to say, when the gas flow is zero at the outlet of the porous mass 6b located downstream, the recondensation chamber is the seat of a condensation of the fuel caused by the search for the balance between, on the one hand, the pressure prevailing upstream of the porous mass 6a of the flow regulator / evaporator 6, located upstream, that is to say between the pressure prevailing in the tank 2 and which corresponds to the vapor pressure of the fuel present in the liquid phase, and on the other hand, that which prevails downstream of the porous mass 6a, that is to say in the recondensation chamber 7.
This phenomenon of searching for balance is relatively long because the mass transfer, through the porous mass 6a of the regulator 6, is effected by capillarity phenomena within a meso-porous medium. During this time, the heat distribution member 5 cools.
this chamber 7 As soon as the first drop of condensate appears inside the recondensation chamber 7, the pressure inside this chamber becomes equal to the vapor pressure of the fuel. Over time, this chamber 7 is completely filled with liquid condensate.
the flow corresponding to the transient regime will be twice that corresponding to the normal operating regime.
the duration of the transient regime depends on the one hand, on the volume of the recondensation chamber and on the other hand, on the permeability of the porous mass 6b located downstream.
the transient regime persists with a flow rate accelerated by the high value of the pressure in this recondensation chamber 7.
the rate of evaporation can be limited in time by the weakness of the liquid-vapor interface inside the recondensation chamber 7, reducing the pressure to a value lower than the vapor pressure of the fuel, but this does not change this effect in any way. acceleration of the flow during the transient regime.
each porous mass 6a, 6b of the regulator 6 is constituted by a mesoporous membrane.
the slowness of the phenomenon of recondensation by mass transfer within the porous medium constituting the upstream mass 6a of the flow regulator / evaporator 6 makes it possible to avoid such a risk.
the heat distributing member 5 will have reached room temperature before the first drops of liquid fuel have formed in the recondensation chamber 7, since, when the gas flow is interrupted, the pressure in this chamber 7 was at a value lower than the vapor pressure prevailing in the main tank 2.
the mass transfer phenomenon in the porous medium of the upstream porous mass 6a of the regulator 6 must first ensure the return of the pressure of the vapor pressure recondensation chamber before recondensation actually begins.

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Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Feeding And Controlling Fuel (AREA)
Wick-Type Burners And Burners With Porous Materials (AREA)

EP90420390A 1989-09-21 1990-08-29 Mittel zum Zuführen von gasförmigem Brennstoff bei einem Gerät, das die Verbrennung dieses in flüssigem Zustand gespeicherten Gases verwendet Expired - Lifetime EP0420768B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT90420390T ATE73219T1 (de)	1989-09-21	1990-08-29	Mittel zum zufuehren von gasfoermigem brennstoff bei einem geraet, das die verbrennung dieses in fluessigem zustand gespeicherten gases verwendet.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR8913224		1989-09-21
FR8913224A FR2652148B1 (fr)	1989-09-21	1989-09-21	Moyens d'alimentation en combustible gazeux d'un appareil utilisant la combustion de ce gaz stocke en phase liquide.

Publications (2)

Publication Number	Publication Date
EP0420768A1 true EP0420768A1 (de)	1991-04-03
EP0420768B1 EP0420768B1 (de)	1992-03-04

Family

ID=9386250

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP90420390A Expired - Lifetime EP0420768B1 (de)	1989-09-21	1990-08-29	Mittel zum Zuführen von gasförmigem Brennstoff bei einem Gerät, das die Verbrennung dieses in flüssigem Zustand gespeicherten Gases verwendet

Country Status (6)

Country	Link
US (1)	US5044936A (de)
EP (1)	EP0420768B1 (de)
AT (1)	ATE73219T1 (de)
DE (1)	DE69000029D1 (de)
ES (1)	ES2030314T3 (de)
FR (1)	FR2652148B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE59712744D1 (de) *	1996-12-13	2006-11-23	Fuba Automotive Gmbh	Leitungs-Steckverbindung
TW540438U (en) *	2002-11-14	2003-07-01	Aries Ind Corp	Power-driven tool with audio functions
CN107327842A (zh) *	2017-08-11	2017-11-07	郭汉荣	一种智能燃油汽化安全燃烧系统及燃油汽化燃烧方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE826059C (de) *	1948-10-02	1951-12-27	Peter Quack	Koch- und Heizvorrichtung
FR1209966A (fr) *	1957-06-04	1960-03-04		Brûleur à combustible liquide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2313638A1 (fr) *	1975-06-05	1976-12-31	Genoud & Cie Ets	Detendeur pour briquet a gaz
FR2489934B1 (fr) *	1980-09-05	1985-06-07	Feudor Sa	Briquet a gaz jetable
JPS6137370A (ja) *	1984-07-30	1986-02-22	Nakajima Doukoushiyo:Kk	液化ガスを用いた熱ごて
JPH0335969Y2 (de) *	1988-04-27	1991-07-30

1989
- 1989-09-21 FR FR8913224A patent/FR2652148B1/fr not_active Expired - Lifetime
1990
- 1990-08-29 DE DE9090420390T patent/DE69000029D1/de not_active Expired - Fee Related
- 1990-08-29 EP EP90420390A patent/EP0420768B1/de not_active Expired - Lifetime
- 1990-08-29 ES ES199090420390T patent/ES2030314T3/es not_active Expired - Lifetime
- 1990-08-29 AT AT90420390T patent/ATE73219T1/de not_active IP Right Cessation
- 1990-09-06 US US07/578,732 patent/US5044936A/en not_active Expired - Fee Related

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE826059C (de) *	1948-10-02	1951-12-27	Peter Quack	Koch- und Heizvorrichtung
FR1209966A (fr) *	1957-06-04	1960-03-04		Brûleur à combustible liquide

Also Published As

Publication number	Publication date
FR2652148B1 (fr)	1991-10-31
ES2030314T3 (es)	1992-10-16
EP0420768B1 (de)	1992-03-04
ATE73219T1 (de)	1992-03-15
DE69000029D1 (de)	1992-04-09
FR2652148A1 (fr)	1991-03-22
US5044936A (en)	1991-09-03

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EP0420768B1 (de)	1992-03-04	Mittel zum Zuführen von gasförmigem Brennstoff bei einem Gerät, das die Verbrennung dieses in flüssigem Zustand gespeicherten Gases verwendet
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