67results about How to "High critical temperature" patented technology

A method of operating an organic rankine cycle system wherein a liquid refrigerant is circulated to an evaporator where heat is introduced to the refrigerant to convert it to vapor. The vapor is then passed through a turbine, with the resulting cooled vapor then passing through a condenser for condensing the vapor to a liquid. The refrigerant is one of CF3CF2C(O)CF(CF3)2, (CF3)2 CFC(O)CF(CF3)2, CF3(CF2)2C(O)CF(CF3)2, CF3(CF2)3C(O)CF(CG3)2, CF3(CF2)5C(O)CF3, CF3CF2C(O)CF2CF2CF3, CF3C(O)CF(CF3)2.

Thin films of conducting and superconducting materials are formed by a process which combines physical vapor deposition with chemical vapor deposition. Embodiments include forming boride films, such as magnesium diboride, in high purity with superconducting properties on substrates typically used in the semiconductor industry by physically generating magnesium vapor in a deposition chamber and introducing a boron containing precursor into the chamber which combines with the magnesium vapor to form a thin boride film on the substrate.

A process is provided for converting heat energy from a heat source to mechanical work or electricity by utilizing a working fluid comprising perfluoroheptene. The process comprises heating a working fluid using heat supplied from the heat source; and expanding the heated working fluid to generate mechanical work. Also provided is an organic Rankine power cycle system utilizing a working fluid comprising perfluoroheptene. Further provided is a method of replacing the working fluid of an Organic Rankine Power Cycle System designed and configured to utilize a working fluid comprising HFC-245fa with a working fluid comprising of a perfluoroheptene.

A Josephson device includes a first superconducting electrode layer, a barrier layer and a second superconducting electrode layer that are successively stacked. The first and second superconducting electrode layers are made of an oxide superconductor material having (RE)1(AE)2Cu3Oy as a main component, where an element RE is at least one element selected from a group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and an element AE is at least one element selected from a group consisting of Ba, Sr and Ca. The barrier layer is made of a material that includes the element RE, the element AE, Cu and oxygen, where in cations within the material forming the barrier layer, a Cu content is in a range of 35 At. % to 55 At. % and an RE content is in a range of 12 At. % to 30 At. %, and the barrier layer has a composition different from compositions of the first and second superconducting electrode layers.

A working medium for a heat cycle includes HFO-1123, HFC-32, and HFO-1234ze. These three components HFO-1123, HFC-32, and HFO-1234ze are present as principal components in a mixture state.

A superconductive element containing Nb3Sn, in particular a multifilament wire, comprising at least one superconductive filament (8) which is obtained by a solid state diffusion reaction from a preliminary filament structure (1), said preliminary filament structure (1) containing an elongated hollow pipe (2) having an inner surface (3) and an outer surface (4), wherein said hollow pipe (2) consists of Nb or an Nb alloy, in particular NbTa, wherein the outer surface (4) is in close contact with a surrounding bronze matrix (5) containing Cu and Sn, and wherein the inner surface (3) is in close contact with an inner bronze matrix (5) also containing Cu and Sn, is characterized in that the inner bronze matrix (5) of the preliminary filament structure (1) encloses in its central region an elongated core (6) consisting of a metallic material, said metallic material having at room temperature (=RT) a thermal expansion coefficient αcore<17*10−6K−1, preferably αcore≦8*10−6 K−1, said metallic material having at RT a yield strength Rp0,2>300 MPa, said metallic material having at RT an elongation at rupture A>20%, and wherein the metallic material of the core (6) is chemically inert with respect to the material of the inner bronze matrix (5) up to a reaction temperature T of the solid state diffusion reaction. This element has improved superconductive properties in a large volume fraction of its superconductive filaments, in particular a high critical temperature Tc and a high critical magnetic filed strength Bc2, and is mechanically stable enough for commercial applications such as magnet coils.

Compositions and methods are provided for delayed breaking of viscoelastic surfactant gels inside subterranean formations. Breaking is accomplished without mechanical intervention or use of a second fluid. The delayed breaking agent is selected from alkyl ether phosphates and salts thereof, alkylaryl ether phosphates and salts thereof, alkyl sulfates and salts thereof, alkylaryl sulfates and salts thereof, alkyl ether sulfates and salts thereof, alkylaryl ether sulfates and salts thereof, and mixtures of any of the foregoing. The viscoelastic surfactant can be a zwitterionic surfactant, and can be selected from the group consisting of sultaines, betaines, and amidoamine oxides.

The invention relates to a household appliance (1) comprising a drying chamber (2) for drying wet articles (3) therein, a process air loop (4) for circulating process air to dry the articles (3) and a heat pump (8, 9, 10, 11, 12). Said heat pump (8, 9, 10, 11, 12) comprises a heat transfer loop (8) containing a heat transfer fluid to be circulated through said heat transfer loop (8), an evaporator heat exchanger (9) for transferring heat from the process air into said heat transfer fluid by evaporating said heat transfer fluid, a liquefier heat exchanger (10) for transferring heat from said heat transfer fluid to the process air by liquefying said heat transfer fluid, a compressor (11) for compressing the heat transfer fluid and driving the heat transfer fluid through said heat transfer loop (8), and a nozzle (12) for decompressing said heat transfer fluid. Further, said heat transfer fluid has a critical temperature above 60 DEG C, a nominal heat of vaporization at boiling point of at least 220 kJ / kg, a GWP index of less than 150 and a lower flammability level of at least 0,1 kg / m3.

An NMR apparatus which includes an NMR probe coil of a superconductor made of magnesium 2-boride formed on the surface of a substrate made of a flexible organic polymer material.