Patent application number | Description | Published |
20110239670 | Method For Managing Access To A Confined Space With Renewal Of The Atmosphere By Means Of Forced Ventilation/Extraction And The Use Of Physical Barriers That Can Be Opened In A Variable And Controlled Manner - A method for managing access to a confined space which is cooled by the direct injection of a cryogenic fluid, comprising at least one system for closing the confined space, which can prevent access to said confined space and can be opened/closed to a variable and controllable degree, and a data acquisition and processing device. The device can: control the open or closed state of the closure system; set and control the degree to which the closure system is open/closed; ensure that a time delay (TP) is respected every time the closure system is closed, after which time delay the injection of cryogenic fluid into the space resumes; and, at the request of a user, implement the cycle for opening the closure system. The device determines the time that has elapsed (TE) in the closed position since the last closure cycle of the closure system and compares TE to TP. If TE=TP the device immediately authorizes the opening of the closure system. If TE>TP the device authorizes the opening of the closure system after a predefined waiting time. | 10-06-2011 |
20110253342 | Cooling System for a Transporting Vehicle with a Plurality of Cooling Chambers - The present invention relates to an apparatus and a method for cooling at least one chamber of a transporting vehicle for chilled products by means of a cooling unit, preferably a tank for liquid nitrogen or carbon dioxide, in which there is at least one cooling intermediate circuit having a heat exchange medium, the cooling intermediate circuit having a first heat exchanger for cooling the heat exchange medium by means of the cooling unit, each chamber in each case being assigned a second heat exchanger which can be connected on the primary side to the intermediate circuit and by means of which, on the secondary side, the air in the particular chamber can be cooled. There are preferably two or more chambers, each having a second heat exchanger, wherein the cooling intermediate circuit and a heating intermediate circuit, preferably having the same heat exchange medium, are arranged and connected in such a manner that each of the second heat exchangers can be connected either to the cooling intermediate circuit or the heating intermediate circuit. The heating intermediate circuit is particularly preferably connected via heat exchangers and a mechanically or electrically driven heat pump to the cooling intermediate circuit in such a manner that heat can be withdrawn from the cooling intermediate circuit and supplied to the heating intermediate circuit. In this manner, even a plurality of cooling chambers of a transporting vehicle are to be kept at any desired different temperatures in an energy-saving manner. | 10-20-2011 |
20130055728 | Refrigeration Vehicle and Method for Cooling its Refrigeration Space Using a Low-Temperature-Liquefied Combustible Gas - The present invention relates to a refrigeration vehicle comprising at least one refrigeration space, which can be cooled via at least one supplemental heat exchanger. The supplemental heat exchanger in the refrigeration space is connected to other components, preferably via couplings and flexible lines, establishing a heat exchange loop being able to exchange heat with an evaporator for low-temperature liquefied combustible gas. Moreover the Refrigeration vehicle comprises at least one first vehicle part and one second vehicle part being dividable and wherein the first vehicle part comprises an internal combustion engine and the evaporator for the low-temperature liquefied combustible gas. The refrigeration vehicle in addition comprises a first nitrogen tank for liquid nitrogen and a nitrogen heat exchanger as well as a boil-off device in the first vehicle part for joint storage and/or transportation of low-temperature liquefied combustible gas and liquid nitrogen by keeping the combustible gas cooled in a fuel tank indirectly or directly by the liquid nitrogen. The invention relates, furthermore, to a refrigeration method for refrigerating at least one refrigeration space of a refrigeration vehicle via at least one supplemental heat exchanger. Heat is extracted from the refrigeration space via the supplemental heat exchanger and conducted via a heat exchange loop to an evaporator, for evaporation of low-temperature liquefied combustible gas, especially liquefied natural gas, which is afterwards supplied to an internal combustion engine of the refrigeration vehicle. The present invention is especially suitable for refrigeration transporters operated with natural gas, which are used for the distribution of frozen and chilled goods to retail dealers. In particular the economic employment of a combustion engine operated with natural gas in a transporter, storing the natural gas in the liquid phase, and the combined use of this cold for cooling a refrigeration space is highly advantageous, because the amount of energy needed all in all can be explicitly lowered. Moreover, using the boil-off device in the tractor is particularly advantageous, because a simultaneous, combined filling mode for liquid nitrogen and natural gas at a corresponding filling station unit becomes possible, realizing an extraordinary increase in efficiency. | 03-07-2013 |
20130061608 | Method for the Refrigerated Transportation of a Stock in a Vehicle Implementing a Liquid Combustible Gas Tank and a Liquid Nitrogen Tank - The present invention relates to a supply station jointly storing a low-temperature-liquefied combustible gas, in particular natural gas, and liquid nitrogen and designed for supplying each component separately or jointly as needed to a vehicle, the supply station being present on the vehicle, the station comprising at least a first storage tank for storing said liquefied combustible gas; and at least a second storage tank for storing said liquid nitrogen and at least one heat-transmitting connection element between the at least one first storage tank and the at least one second storage tank, which connection element is designed so that the combustible gas can be cooled, or can be maintained at a temperature below its boiling point, directly or indirectly by the liquid nitrogen. | 03-14-2013 |
20140216601 | Method and Device for Refilling a Storage Tank - The present invention relates to a method and a device for refilling a stationary storage tank with a subcooled cryogenically liquefied gas from a tanker. A subcooler, comprising a cooling bath and connected between the tanker and an inlet of the storage tank, is filled with the liquefied gas from the tanker up to a filling level and cooled to a bath temperature. The storage tank is subsequently refilled with the liquefied gas from the tanker by the liquefied gas being pumped through a heat exchanger in the cooling bath of the subcooler into the storage tank by using a delivery pump, during which it is cooled to the bath temperature of the cooling bath. After the end of the filling process, the subcooler is no longer supplied with liquefied gas and therefore heats up. | 08-07-2014 |