摘要:
A means and a method to cool down an MRI magnet, in a cryostat that is designed for a maximum pressure of about 0.2 MPa, are described which use cold helium output from a Brayton cycle refrigerator at a pressure of about 0.8 MPa to exchange heat with helium in the MRI cryostat in a coupling heat exchanger that is located removeably in or proximate the neck tube of the MRI cryostat. A circulator drives helium from the MRI cryostat through the coupling heat exchanger.
摘要:
The invention relates to a method for cooling objects, in which a cooling medium is supplied from a first storage container (3) via a first cooling medium line (5) to an object (2) to be cooled, is brought into thermal contact with the latter and is then discharged via a second cooling medium line (16), which is characterised according to the invention in that after thermal contact with the object (2) the cooling medium is supplied via the second cooling medium line (16) to a second storage container (17) and stored there until a predefined level is reached in the first or second storage container (3, 17). The cooling medium is then supplied from the second storage container (17) to the object (2) for the purpose of cooling and brought into thermal contact with the latter, and then fed back into the first storage container (3), whereupon it is available again for cooling the object. Because the cooling medium is conducted in alternating directions between the two storage containers (3, 17), the same flow paths can at least partially be used in both flow directions. The invention is in particular suited to cooling superconductive cables.
摘要:
Procédé d'utilisation d'une installation de délivrance d'un produit congelé comportant une canalisation (3) connectée à un récipient de stockage (1) ou à une installation de production dudit produit congelé. Préalablement à l'introduction dudit produit dans ladite canalisation (3) ou pendant une interruption du fonctionnement de ladite installation, on fait passer dans ladite canalisation (3) un fluide froid portant ladite canalisation (3), à une température compatible avec le maintien dudit produit sous forme congelée lors de son séjour dans ladite canalisation (3) ou maintenant ladite canalisation à ladite température. Installation de délivrance d'un produit congelé du type comportant un récipient de stockage (1) ou une installation de production dudit produit congelé et une canalisation de délivrance (3). Elle comporte des moyens (5) pour faire passer un fluide froid dans ladite canalisation (3) à partie d'un point (6) situé à proximité d'une de ses extrémités. Application à l'industrie alimentaire.
摘要:
The present invention provides a system and a method for the production of microparticles and nanoparticles of materials that can be dissolved. The system and method of the present invention provide quicker freezing times, which in turn produces a more uniform distribution of particle sizes, smaller particles, particles with increased porosity and a more intimate mixing of the particle components. The system and method of the present invention also produce particles with greater surface area than conventional methods. One form of the present invention provides a method for the preparation of particles. An effective ingredient is mixed with water, one or more solvents, or a combination thereof, and the resulting mixture is sprayed through an insulating nozzle located at or below the level of a cryogenic liquid. The spray generates frozen particles.
摘要:
An impinger for cooling or freezing products includes an impingement plate containing openings for directing impingement jets of a mixture of gas and solid or liquid cryogen toward the products transported on a conveyor, wherein the openings in aggregate have an open area of about 7% to about 12% of the total surface area of the impingement plate, the impingement plate providing a back pressure restriction of about 220 to about 475 Pa, A process for cooling or freezing products within a housing chamber includes transporting the products, particularly IQF food products, on a moving substrate within the chamber, mixing a gas with solid or liquid cryogen to form a mixture, directing the mixture to the aforementioned impinger; and selectively directing the pressurized impingement jets of the mixture from the impingement plate toward the products transported on the substrate.
摘要:
A device for cooling a substance stored within the device is provided. The device has a body with an internal compartment. The compartment can be sealed closed and can be accessed for adding a substance to be cooled to the compartment or removing the substance from the compartment. The body of the device has an internal cavity that surrounds the exterior of the compartment holding the substance to be cooled. Fluidized coolant is injected into the cavity through an injection port to cool the substance for use.
摘要:
Die Erfindung betrifft kühlbaren optischen Tisch (1) mit einer Tischplatte (9) und mindestens einem Tischbeinen. In einer Tischoberfläche der Tischplatte sind Befestigungsmittel zur Befestigung von Objekten wie optischen Elementen vorgesehen. Die Tischbeine sind mit einer Dämpfungseinrichtung (5) zur Dämpfung von Vibrationen ausgestattet.
摘要:
A transport refrigeration system (TRS) for refrigeration of a transport unit is disclosed. The TRS includes an eutectic device, including an eutectic medium, connected to a refrigerant circuit and a cooling fluid circuit. A method for cooling with the eutectic device is also disclosed. The eutectic device including the eutectic medium is cooled with one or both of the cooling fluid circuit and/or the refrigerant circuit. The refrigerant circuit directs a refrigerant from a transport refrigeration unit.
摘要:
A temperature control system for controlling a temperature of a device under test includes a fluid source and a cooling device reducing a temperature of the fluid supplied by the fluid source and outputting the fluid having the reduced temperature to a device under test. A filter is positioned between the device under test and the cooling device to filter out ice particles that lead to significant charge generation in order to prevent the device under test from being subjected to high voltages as a result of static charge generation.