Abstract: A heat exchange device suitable for cooling recirculated exhaust gases in an EGR (Exhaust Gas Recirculation) system includes a configuration which allows integrating the heat exchanger in a cavity of the engine block of an internal combustion engine with the cavity being in fluid communication with the liquid coolant of the engine.

Abstract: A wiring harness for a shielded superconducting magnetic resonance magnet in which resistors are connected in parallel with pairs of symmetrically connected coils. The symmetric nature of the magnetic field can be maintained during a quench since coils placed symmetrically about the plane of symmetry always conduct the same current, eliminating unbalance forces that are normally associated with a quench of a shielded magnet.

Abstract: When it is desired to change the magnetic field levels in a superconducting magnet, it is conventional practice to employ electrical leads. One end of the leads is maintained at cryogenic temperatures while the other is at ambient temperature. In some cases, it is desirable to remove the leads when they are not being used, in order to reduce thermal losses. In that case, it is conventional practice to make and break the contact at the cryogenic temperature. However, repeated make and break contacts with such lead can produce worn contact surfaces that eventually exhibit a higher resistance than is desired. This high resistance will give rise to heating of the cryogenic components. In order to alleviate this problem, an excitation lead system is provided which is removable from the cryostat.

Abstract: Means for cooling a winding in the rotor of an electrical machine that is cooled by a flow of liquefied gas. The winding is covered by a heat conductive sheath that transfers the heat developed in the winding to a pool of the liquefied gas. The winding and conductive sheath are insulated by a thermal shield from sources of heat exterior to the winding. The winding and the conductive sheath have a support structure that is provided with cooling channels through which the liquefied gas flows. These channels allow the other components of the rotor to be cooled independently from the winding.