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

Jonathan Macron

Fouad Ammouri

Florence Boutemy

Dominique Jouvaud

Celso Zerbinatti

Loïc Damongeot

Alain Donzel

Claude Weber

Géraldine Carlos

A method for transporting heat-sensitive products in a refrigerated truck that includes at least one product storage chamber, a cryogenic fluid reserve, and a main heat exchanger system for circulation of the cryogenic fluid therethrough. The main heat exchange system includes walls across which heat may be exchanged, one or more cold-producing blowers for bringing air inside the chamber into contact with the walls, and a heating system for heating air inside at least one of the chambers. Upon the occurrence of one or more events, heated air is blown into an intake side of the cold-producing blower(s).

Method and device for refrigerated transport using an indirect injection of a cryogenic liquid and a heating system for maintaining temperature in the event of extremely low outside temperatures

(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

Method of estimating the volume (Vtk) of a tank (), comprising:

Method of estimating the volume of a pressurized gas container

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.

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Paris, France

Jonathan Macron