Abstract: Exchanger having a tube and fin bundle and comprising: a duct (4) through which a cryogenic fluid can flow between a fluid inlet (1) into the exchanger and a fluid outlet (2) from the exchanger; and a system of flat, continuous and parallel fins (3) through which said duct passes inside the exchanger, it being possible for air (12) to circulate within the exchanger by passing through channels delimited by the space between the duct and the parallel fins. The exchanger is characterized in that it comprises at least two independent ducts (10a, 10b) for the circulation of cryogenic fluid within the exchanger.

Abstract: A method for managing the operation of a refrigerated truck for transporting heat-sensitive products, of the indirect-injection type, in which the parameter ?T=Tair inlet?Tsetpoint(Tair inlet: temperature of the air coming into contact with the heat exchanger internal to the truck as a result of the action of the fan, Tsetpoint: temperature to be set in the chamber inside the truck) is determined in real time and in which if ?T is greater than an upper setpoint value ?Tsetpoint H, a rapid-pressurization (RMP) circuit is activated to vaporize some cryogen and thus increase the pressure in the head of gas above the reserve of cryogen of the truck.

Abstract: Exchanger having a tube and fin bundle and comprising: a duct (4) through which a cryogenic fluid can flow between a fluid inlet (1) into the exchanger and a fluid outlet (2) from the exchanger; and a system of flat, continuous and parallel fins (3) through which said duct passes inside the exchanger, it being possible for air (12) to circulate within the exchanger by passing through channels delimited by the space between the duct and the parallel fins. The exchanger is characterized in that it comprises at least two independent ducts (10a, 10b) for the circulation of cryogenic fluid within the exchanger.

Abstract: The invention relates to a method for transporting heat-sensitive products in a refrigerated lorry of the indirect injection type, wherein the temperature Tint inside the storage chamber is regulated by varying the pinch of the exchanger (Pinch=Tint?TFluid outflow) according to the position of the internal temperature Tint in relation to a temperature set value.

Abstract: A method for managing the operation of a refrigerated truck for transporting heat-sensitive products, of the indirect-injection type, in which the parameter ?T=Tair inlet?Tsetpoint(Tair inlet: temperature of the air coming into contact with the heat exchanger internal to the truck as a result of the action of the fan, Tsetpoint: temperature to be set in the chamber inside the truck) is determined in real time and in which if ?T is greater than an upper setpoint value ?Tsetpoint H, a rapid-pressurization (RMP) circuit is activated to vaporize some cryogen and thus increase the pressure in the head of gas above the reserve of cryogen of the truck.

Abstract: The invention relates to a method for transporting heat-sensitive products in a refrigerated lorry of the indirect injection type, wherein the temperature Tint inside the storage chamber is regulated by varying the pinch of the exchanger (Pinch=Tint?TFluid outflow) according to the position of the internal temperature Tint in relation to a temperature set value.

Abstract: The invention relates to a flowmeter for two-phase gas/liquid cryogenic fluids, comprising: a liquid/gas phase separator, preferably consisting of a tank, into the top part of which the cryogenic liquid is admitted; a liquid flow-rate sensor, located in a liquid duct in fluid communication with the bottom part of the tank, the tank being placed in a high position in space relative to the liquid flow-rate sensor; a gas duct, in fluid communication with the top part of the tank equipped with the gas valve; and a device for measuring the level of liquid in the tank, preferably comprising two level sensors: a lower level sensor and an upper level sensor.

Abstract: A vehicle for the refrigerated transport of products comprising at least one products storage chamber, characterized in that:—one or more panels made from a material of so-called “phase-change” type have been incorporated into the structure of all or part of the walls of at least one of the storage chambers of the lorry;—the phase-change material has a melting point that is just a few degrees higher than the target datum temperature for the chamber in question, preferably 2 to 10° C. higher than said datum temperature and more preferably still 3 to 5° C. higher than said datum temperature.

Abstract: A method and installation using liquid CO2 as a cryogenic fluid for transferring cold energy to products, wherein liquid CO2 is sent into a heat exchanger system including first and second heat exchangers connected in series. The liquid CO2 is supplied to the first heat exchanger where it evaporates. Gaseous CO2 from the first exchanger is supplied to the second heat exchanger. The atmosphere surrounding the products is blown across the heat exchangers to provide a cooled atmosphere with which to cool the products. The latent heat of vaporization of the liquid CO2 in the first heat exchanger and the sensible heat of the gaseous CO2 in the second heat exchanger satisfies the cooling requirement of the products. The first exchanger is kept at a pressure higher than the triple point pressure for CO2, whereas the second exchanger is held at atmospheric pressure or at a pressure between the triple point of the fluid and atmospheric pressure.

Abstract: The invention relates to a method implementing liquid CO2 as a cryogenic fluid for transferring negative calories to products, said method being of a so-called indirect injection type wherein the liquid CO2 is sent into a heat exchanger system where same evaporates, the method being characterized in that, prior to reaching the exchanger system, the liquid CO2 undergoes an expansion operation, at a pressure selected to obtain a gas/solid mixture at the output of the expansion operation.