A coil system for a magnetic resonance tomography system includes a plurality of coils for sending and/or receiving high-frequency signals. The plurality of coils is disposed in a receiving chamber between a tomography magnet and a lining of an opening in the tomography magnet and may be cooled by a cooling apparatus. When the coil system is in an operating state, the receiving chamber is filled with a cryogenic cooling medium.

A system for controlling or optimizing the performance of a vapor compression system by modifying the actuator commands via an output interface, that realizes thermofluid property functions and their derivatives as spline functions which are represented in a coordinate system that is aligned with a fluid saturation curve. The system includes an interface configured to receive measurement data from sensors, a memory configured to store thermofluid property data and computer-executable programs including a B-spline method, and a processor for performing the computer-implemented method. The processor is configured to take as input two thermofluid property variables, and compute a coordinate transformation in which one axis of the coordinates is aligned with the liquid and vapor saturation curves. In the saturation-curve aligned coordinates, a spline function represents the thermofluid property function, with coefficients and knots stored in memory. The spline function is constructed in a manner such that derivatives of the thermofluid property function may be discontinuous across the saturation curve.

A system for controlling or optimizing the performance of a vapor compression system by modifying the actuator commands via an output interface, that realizes thermofluid property functions and their derivatives as spline functions which are represented in a coordinate system that is aligned with a fluid saturation curve. The system includes an interface configured to receive measurement data from sensors, a memory configured to store thermofluid property data and computer-executable programs including a B-spline method, and a processor for performing the computer-implemented method. The processor is configured to take as input two thermofluid property variables, and compute a coordinate transformation in which one axis of the coordinates is aligned with the liquid and vapor saturation curves. In the saturation-curve aligned coordinates, a spline function represents the thermofluid property function, with coefficients and knots stored in memory. The spline function is constructed in a manner such that derivatives of the thermofluid property function may be discontinuous across the saturation curve.

The invention provides a compact and self-sustained refrigeration system for medical uses, including in hospitals, in clinics and in home uses, including rescue and field emergency situations, independent of external power supply, based on small amounts of liquid carbon dioxide.

A cold heat recovery system includes a first cold heat recovery cycle including a first expansion turbine and configured to circulate a first heat medium, a second cold heat recovery cycle including a second expansion turbine and configured to circulate a second heat medium, a first heat exchanger provided on a downstream side of the first expansion turbine on the first cold heat recovery cycle and configured to transfer cold energy from a first fuel to the first heat medium, a second heat exchanger configured to transfer cold energy from a second fuel to the first fuel flowing on a downstream side of the first heat exchanger and reliquefy the first fuel, and a third heat exchanger provided on a downstream side of the second expansion turbine on the second cold heat recovery cycle and configured to transfer cold energy to the second heat medium from the first fuel flowing on a downstream side of the second heat exchanger.

The present disclosure provides a refrigeration system. The system includes an evaporator unit having a housing configured to receive the refrigerant and an air inlet port configured to receive air. A porous material is disposed within the housing for defining a first compartment and a second compartment. A compressor unit is fluidically coupled to the housing and configured to induce an evacuation action within the housing, which enables air to enter the housing from the ambient surroundings via the air inlet port. The porous material is positioned above the air inlet port for allowing the air into the housing therethrough. The routed air disperses within the housing to form air bubbles, inducing turbulent motion of the refrigerant for converting the refrigerant into a mixture of refrigerant vapors and a cooled refrigerant. A heat exchanger is configured to refrigerate the enclosure.

The present disclosure provides a refrigeration system. The system includes an evaporator unit having a housing configured to receive the refrigerant and an air inlet port configured to receive air. A porous material is disposed within the housing for defining a first compartment and a second compartment. A compressor unit is fluidically coupled to the housing and configured to induce an evacuation action within the housing, which enables air to enter the housing from the ambient surroundings via the air inlet port. The porous material is positioned above the air inlet port for allowing the air into the housing therethrough. The routed air disperses within the housing to form air bubbles, inducing turbulent motion of the refrigerant for converting the refrigerant into a mixture of refrigerant vapors and a cooled refrigerant. A heat exchanger is configured to refrigerate the enclosure.

Thermal management systems include an open circuit refrigeration system featuring a first receiver configured to store a gas, a second receiver configured to store a liquid refrigerant fluid, an evaporator configured to extract heat from a heat load that contacts the evaporator, and an exhaust line, where the first receiver, the second receiver, the evaporator, and the exhaust line are connected to provide a refrigerant fluid flow path.

A system includes a grinder to obtain a ground meat; a mixer to add fat to the ground meat; a payload bay to receive the ground meat; a plurality of evaporators coupled to the payload bay; a pump to force coolant flowing through the evaporators; and means for adding fat to the chopped meat product and then chopping the fat and adding liquid nitrogen to maintain the temperature of the chopped meat product and fat being chopped between 1° C. and 10° C. to obtain a chopped meat and fat product.

A cooling system comprises a liquid hydrogen storage tank, a liquid hydrogen metering pump having a pump inlet in fluid communication with the liquid hydrogen storage tank, and a pump outlet, a hydrogen evaporator heat exchanger having an evaporator inlet in fluid communication with the pump outlet, and an evaporator outlet, a hydrogen gas accumulator having an accumulator inlet in fluid communication with the evaporator outlet, and an accumulator outlet, a hydrogen fuel cell system comprising at least one hydrogen fuel cell having a fuel cell inlet in fluid communication with the accumulator outlet, and a coolant circuit comprising a first coolant path disposed in thermal contact with the hydrogen evaporator heat exchanger.