Fe-Cr-Ni-Al ferritic alloys
    172.
    发明专利

    公开(公告)号:GB2238317B

    公开(公告)日:1994-01-19

    申请号:GB9023677

    申请日:1990-10-31

    Abstract: Fe-Cr-Ni-Al ferritic alloy capable of forming hot oxidation/corrosion resistive aluminum oxide scale in the surface thereof by exposure to oxidation environments at elevated temperatures. Due to the ferritic structure, the aluminum oxide scale is formed uniformly and densely to improve scale adherence, or prevent scale flaking. The mechanical properties of the ferritic alloy is considerably improved by incorporation of controlled amounts of Cr, Ni, and Al relative to each other, which are added to precipitate minute Ni-Al intermetallic compounds in the alloy matrix while retaining the ferritic structure. Such minute Ni-Al intermetallic compounds are thought to be responsible for improved mechanical properties, including high temperature strength, tensile strength, hardness and the like. Whereby, the alloy combine excellent hot oxidation/corrosion resistance and improved mechanical properties.

    174.
    发明专利
    未知

    公开(公告)号:DE3809452C2

    公开(公告)日:1992-07-02

    申请号:DE3809452

    申请日:1988-03-21

    Abstract: A superconductor for magnetic field shield comprising closed-ring disc-shaped superconductive magnetic field shielding members and spacing members having the same shape as that of the magnetic field shielding member and alternately laminated with the shielding members, the superconductor for magnetic field shield being characterized in that the shield has an extremely superior and stable magnetic field shielding effect without any secular reduction of the shielding effect and capable of providing a large shielding space using a minimum amount of material.

    175.
    发明专利
    未知

    公开(公告)号:DE4026699A1

    公开(公告)日:1991-05-08

    申请号:DE4026699

    申请日:1990-08-23

    Abstract: A heat pump system comprising a heat pump cycle of refrigerant which includes a compressor 1, a condenser 2, an expansion valve 3 and an evaporator 4, the condenser 2 further including a once-through path 6, 7 of fluid to be heated (e.g. water) and being a counterflow-type heat exchanger, the condenser being so operated that the refrigerant is supercooled in a supercooling degree of not less than 20% of the difference between a saturation temperature of the refrigerant and an inlet temperature of the fluid. The heat pump cycle may be a single cycle or a binary cycle (Fig. 1a) comprising a high- temperature size (1, 2, 3, 5) heat pump cycle of a high boiling refrigerant and a low-temperature side (11, 13, 14, 15) heat pump cycle of a low boiling refrigerant. The evaporator may include a once-through path for fluid to be cooled (e.g. water). Hot fluid and/or cold fluid are thus discharged. In particular, high quality hot water higher than an inlet temperature of water by 30-100 DEG C can be obtained.

    FE-CR-NI-AL FERRITIC ALLOYS
    176.
    发明专利

    公开(公告)号:GB9023677D0

    公开(公告)日:1990-12-12

    申请号:GB9023677

    申请日:1990-10-31

    Abstract: Fe-Cr-Ni-Al ferritic alloy capable of forming hot oxidation/corrosion resistive aluminum oxide scale in the surface thereof by exposure to oxidation environments at elevated temperatures. Due to the ferritic structure, the aluminum oxide scale is formed uniformly and densely to improve scale adherence, or prevent scale flaking. The mechanical properties of the ferritic alloy is considerably improved by incorporation of controlled amounts of Cr, Ni, and Al relative to each other, which are added to precipitate minute Ni-Al intermetallic compounds in the alloy matrix while retaining the ferritic structure. Such minute Ni-Al intermetallic compounds are thought to be responsible for improved mechanical properties, including high temperature strength, tensile strength, hardness and the like. Whereby, the alloy combine excellent hot oxidation/corrosion resistance and improved mechanical properties.

    HEAT PUMP SYSTEM
    177.
    发明专利

    公开(公告)号:GB9016544D0

    公开(公告)日:1990-09-12

    申请号:GB9016544

    申请日:1990-07-27

    Abstract: A heat pump system comprising a heat pump cycle of refrigerant which includes a compressor 1, a condenser 2, an expansion valve 3 and an evaporator 4, the condenser 2 further including a once-through path 6, 7 of fluid to be heated (e.g. water) and being a counterflow-type heat exchanger, the condenser being so operated that the refrigerant is supercooled in a supercooling degree of not less than 20% of the difference between a saturation temperature of the refrigerant and an inlet temperature of the fluid. The heat pump cycle may be a single cycle or a binary cycle (Fig. 1a) comprising a high- temperature size (1, 2, 3, 5) heat pump cycle of a high boiling refrigerant and a low-temperature side (11, 13, 14, 15) heat pump cycle of a low boiling refrigerant. The evaporator may include a once-through path for fluid to be cooled (e.g. water). Hot fluid and/or cold fluid are thus discharged. In particular, high quality hot water higher than an inlet temperature of water by 30-100 DEG C can be obtained.

    178.
    发明专利
    未知

    公开(公告)号:FR2642152A1

    公开(公告)日:1990-07-27

    申请号:FR9000701

    申请日:1990-01-22

    Abstract: PURPOSE:To make it possible to supply hot water or cold water extremely in a short time by heat exchanging liquefied refrigerant with gasified refrigerant perfectly in an opposed current, installing a heated fluid penetration passage to a condenser, and a cooled fluid penetration passage to a vaporizer respectively, and making heated fluid refrigerant inside the vaporizer to flow counter. CONSTITUTION:A refrigerant liquefied gas heat exchanger 11 is installed in an attempt to heat exchange liquefied refrigerant from the outlet of a condenser 2 to an expansion valve 3 with gasified refrigerant from a vaporizer 4 to a compressor 1. The compressor 1, when driven, raises insulation compressed enthalpy i1' to i2'. Then, the refrigerant is heat exchanged with heated hot water in the next condenser 2, cooled under a constant pressure state, and turns into liquefied refrigerant. When further cooled, i3' under an excess cooling state is obtained. The route of heated hot water is formed based on an once through flow. Moreover, heat exchange is made with the refrigerant in a counter flow. Therefore, the refrigerant is cooled by fresh heated hot water constantly supplied, which equalizes the logarithmic mean temperature difference of the both with a lager value. Moreover, as for the outlet of a refrigerant condenser 2, excess cooling can be more effective by the heat exchange made by the heated hot water which flows in at an ambient temperature.

    179.
    发明专利
    未知

    公开(公告)号:FR2627005A1

    公开(公告)日:1989-08-11

    申请号:FR8813890

    申请日:1988-10-24

    Abstract: A magnetic field shield including a superconductive film characterized in that the magnetic field shield comprises a superconductive film layer constituted primarily of a mixed crystalline body of niobium nitride and titanium nitride laminated on a metal substrate, that the magnetic field further comprises a nobium-titanium alloy layer or a metal film layer in the above lamination, that the magnetic field comprises a plurality of the above-mentioned layers, and that the magnetic field has a plurality of small holes passing through the layers in the direction of the thickness. The magnetic field shield of the present invention produces an excellent magnetic field shielding effect due to a superconductive characteristic peculiar to the superconductive film layer constituted primarily by a mixed crystalline body of niobium nitride and titanium nitride. The cooling effect of the metal substrate maintains the magnetic field shielding effect at a high level. In addition, due to the use of the niobium-titanium alloy layer, the magnetic field shield has high resistance against peeling, greatly increasing the practical usefulness of the magnetic field shield. In the case of the magnetic field shield with a plurality of the laminated layers, the cooling effect of the metal film layers included in the multiple layers stably maintains the magnetic field shielding effect of the superconductive film layers. In the case of the magnetic field shield with small holes, the electromagnetic shielding and cooling effects of the holes are added to further strengthen the magnetic field shielding effect.

    180.
    发明专利
    未知

    公开(公告)号:FR2613115A1

    公开(公告)日:1988-09-30

    申请号:FR8803822

    申请日:1988-03-23

    Abstract: A superconductor for magnetic field shield comprising closed-ring disc-shaped superconductive magnetic field shielding members and spacing members having the same shape as that of the magnetic field shielding member and alternately laminated with the shielding members, the superconductor for magnetic field shield being characterized in that the shield has an extremely superior and stable magnetic field shielding effect without any secular reduction of the shielding effect and capable of providing a large shielding space using a minimum amount of material.

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