L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

Fouad Ammouri

Pierre Rouchon

Olivier Beuneken

Sitra Colom

Marie Delclaud

Arthur Thomas

Olga Wojdas

Jonathan Macron

Florence Boutemy

Thomas Bourgeois

Jean Gallarda

Diana Tudorache

Loïc Damongeot

Mathilde Weber

Elena Vyazmina

Alain Donzel

Thierry Barbe

Guillaume Lodier

Julien Lagarde

David Vempaire

Stéphane Bonnetier

Stéphane Dudret

Rémi Gonin

A method of improving an endothermic process in a furnace utilizing steps a) calibrating the simplified physical model of step c3) by measuring one or more tube temperature for at least a tube impacted by the throttling of a burner in standard and in throttled state, b) acquiring information on a tube temperature for the tubes present in the furnace with all the burners present in the furnace under standard non-throttled conditions, c) getting a map of burners to throttle including c1) choosing at least one parameter representative of the performances of the furnace with a target of improvement, c2) choosing at least one or more power ratio for the burner throttling, c3) utilizing the information of step b) and a simplified physical model of the impact of throttling a burner on the tube temperature, c4) getting a map of burners to throttle, step d) throttling the burners.

Method for improving the homogenization of the temperatures in a steam methane reformer by adjusting the power distribution

Method for filling a tank with pressurized gas to a target pressure from at least one pressurized gas source via a transfer pipe provided with at least one valve, the tank having a predetermined inner length and predetermined inner diameter, the end of the transfer pipe forming an injector with a predetermined injection diameter; said method comprises a step for transferring pressurized gas from the source to the tank at a predetermined flow rate, the method comprising a step of controlling the transfer of gas from the source to the tank to reduce the heat produced in the tank, the step of controlling the transfer of gas comprising at least one of: sizing of the injection diameter, and sizing of the flow rate of the transferred gas; the control step being carried out according to the ratio L/D between the length and the diameter of the tank.

Method and device for filling a tank with pressurized gas

A method for filling or withdrawing from a pressurized gas tank. The tank having a wall having a cylindrical overall shape with dimensions and thermophysical properties that are given and known. The method including the regulation of the flow rate of the introduced or withdrawn gas, and/or of the temperature of the introduced gas, to avoid a situation in which the tank reaches a given high temperature threshold or a given low temperature threshold. The method including a step of estimating, by calculating in real time, at least one tank temperature from: the average temperature of the tank wall, the maximum temperature reached by the tank wall, the minimum temperature reached by the tank wall, and in that the flowrate of gas or the temperature of the gas is regulated depending on the calculated tank temperature.

Method and device for filling or withdrawing from a pressurized gas tank

A method for filling a tank () with liquefied gas, in particular a tank with cryogenic liquid, from a liquefied gas container (), in particular a cryogenic liquid container (), which container () is in fluid communication with the tank () via a filling pipe (), wherein the method uses a pressure differential generation member () for transferring liquid from the container () to the tank () at a predetermined pressure, characterized in that, at or following the switching on time (M) of the pressure differential generation member (), the method comprises a step of determining the pressure (PT) in the tank () via a measurement of a first pressure in the filling pipe (), and, following the determination of the pressure (PT) in the tank, a step of limiting the first instantaneous pressure (PT) to a level below a maximum pressure threshold (PTsup), said maximum pressure threshold being defined on the basis of the determined value of the pressure (PT) in the tank () and exceeding said determined value of the pressure (PT) in the tank by two to twenty bars and preferably by two to nine bars.

Method for filling a tank with liquefied gas

A method for filling a tank () with liquefied gas, in particular a tank with cryogenic liquid, from a liquefied gas container (), in particular a cryogenic liquid container (), wherein, following a predetermined time after filling has started, the method comprises the step of comparing the first instantaneous pressure (PT) in the filling pipe () or an average of said first instantaneous pressure (PT) with a predetermined maximum threshold (Pmax), and, when said first instantaneous pressure (PT) in the filling pipe () or the average of said first instantaneous pressure (PT), respectively, exceeds the maximum threshold (Pmax), the step of interrupting (AR) the filling (R).

Method and device for filling a tank with liquefied gas

A method for filling a tank () with liquefied gas, in particular a tank with cryogenic liquid, from a liquefied gas container (), in particular a cryogenic liquid container (), which container () is in fluid communication with the tank () via a filling pipe (), wherein the method uses a pressure differential generation member () for transferring liquid from the container () to the tank () at a predetermined pressure, characterized in that, at or following the switching on time (M) of the pressure differential generation member (), the method comprises a step of determining the pressure (PT4) in the tank () via a measurement of a first pressure in the filling pipe (), and, following the determination of the pressure (PT4) in the tank, a step of limiting the first instantaneous pressure (PT3) to a level below a maximum pressure threshold (PT3sup), said maximum pressure threshold being defined on the basis of the determined value of the pressure (PT4) in the tank () and exceeding said determined value of the pressure (PT4) in the tank by two to twenty bars and preferably by two to nine bars.

The invention relates to a method for filling a tank with a pressurized fuel gas, the average temperature of the gas in the tank is estimated in real time during the filling. The method includes, before the filling, determining the initial temperature of the gas in the tank, determining the initial pressure of the gas in the tank, determining the initial average temperature of the wall of the tank and determining the initial mass of gas in the tank. According to the method, during the filling, the enthalpy of the gas entering into the tank is determined as a function of time and the mass of gas injected into the tank is determined as a function of time or, respectively, the pressure in the tank is determined as a function of time. The average temperature of the gas at the time in the tank is determined in degrees K.

Method for filling a tank with gas

The invention relates to a method for controlling a hydrocarbon vapor reforming reaction using a combustion chamber containing burners and tubes, said tubes being filled with catalysts and capable of being crossed by a mixture of hydrocarbons and vapor, the burners being arranged so as to transfer their combustion heat to the mixture of hydrocarbons and vapor through the walls of the tubes, wherein the temperature T of the wall of each tube is measured in the downstream part of the tube, and if for at least one tube, the measured temperature'is higher or equal to the MOT (DTT-15&#xb0; C.), DTT being the design temperature of the measured tube, the functional parameters of the reforming method are then modified so as to decrease the measured temperature T of this tube down to a value lower than the MOT.

Method for controlling a reforming reaction by measurement of the temperature of the reforming tubes and functional parameter modification

(EN) The invention relates to a method for estimating the characteristic parameters of a cryogenic tank (), in particular geometric parameters, including: a step comprising the measurement of the pressure differential between the upper and lower parts of the tank prior to filling DP; a step comprising the measurement of the pressure differential between the upper and lower parts of the tank after filling DP; a step comprising the determination of the mass of liquid delivered (m) during filling; and a step comprising the calculation of a first geometric parameter (R) of the tank, namely the radius (R) which is calculated from equation (I), wherein g is the Earth's gravitational acceleration and MAVO is a density coefficient that is a function of the density of the liquid and the gas in the tank and optionally in the pressure measuring pipes () when the pressure differential is measured by at least one remote pressure sensor connected to the upper and lower parts of the tank via respective measuring tubes ().

Method for estimating the characteristic parameters of a cryogenic tank, in particular the geometric parameters of the tank

The invention relates to a method for the real-time determination of the filling level of a cryogenic tank intended to house a two-phase liquid/gas mixture, in which at least one of the the level, volume or mass contained in the tank is calculated for the liquid or the gas at each time step. The method includes the use of a thermal model at each time step to calculate the average temperatures of the liquid and the gas in the tank on the basis of the measured pressure differential and at least one of the pressures of said differential; calculation of the change over time in at least the density of the liquid on the basis of the average temperature of the liquid and the pressures in the tank.

Method for the real-time determination of the filling level of a cryogenic tank

Methods and apparatus for determining the NOx content in a combustion flue gas. Several parameters of the combustion process are measured in the combustion furnace. These parameters are then input to a neural network, which then, based upon the input data, generates output data representative of the concentration of NOx in the flue gas. This result is determined without the use of physical NOx sensors.

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Massy, France

Fouad Ammouri