Abstract: A long-period storage accumulator for storing heat water is used as a storing medium. The water is enclosed in large thin-walled containers which are arranged under the ground. The water pressure forces acting on the container walls are carried by the surrounding of the container.

Abstract: A solar energy collector floating on water is supported by fluid cushion and comprises elements each of them consist of a solar energy absorbing layer arranged between two heat insulating layers.

Abstract: In a thermal power station installation the waste heat of the last stage is utilized by storing the cooling water which receives this waste heat, and heating it further during the periods during which the installation is not on full load, whereafter it is supplied to the grid of a remote area heating system.

Abstract: In a heat storage device for low-temperature applications, e.g. for heating greenhouses and warehouses, the drop in temperature in an intermediate heat carrier circuit, which had previously been necessary in such applications, is avoided and a said device of simpler construction than devices previously used for such applications is provided in the form of a plurality of heat storage members, each charged with a meltable heat storage mass and each having ribs, the members being stacked to define a battery thereof and being so arranged that they form between them ducts for the passage therethrough of a current of air, and ribs on said members defining ribs of a heat exchanger. The device may be used in combination with a heat pump. The invention also includes a method of space heating a building by solar energy, a method of cooling an enclosed space and a method of maintaining the ambient air temperature of an enclosed space constant, all by means of a said device.

Abstract: In a blower heat exchanger, (defined as a rotating heat exchanger without external means for fluid transport), several annular fin regions are provided, arranged in series in the radial direction which are staggered against each other, whereby the heat exchange is improved.

Abstract: A rail vehicle including means for converting energy released during braking of the vehicle to a stored potential energy which may be subsequently used to impart acceleration to the vehicle. Pressure accumulators are utilized where the accumulators include a gas which is compressed by braking forces and where the heat of the compressed gas is stored in latent heat storage elements contained within the accumulators. The track upon which the vehicle rides comprises a hermetically closed tubular chamber enclosing the vehicle and which is filled with water vapor to reduce drag on the vehicle.A method of propelling a rail vehicle including the steps of recovering the brake energy produced during braking to a stop, storing this energy and then using the energy to accelerate the vehicle from the stop.

Abstract: A composite pressure tube for the transport of hot fluid substances is proposed consisting of a very thin internal metal tube and a layer of mineral fibres, which are arranged in laminations wound cross-wise above each other and which carry at least the hoop stresses of the tube. These fibres are so wound that each is liable to take up equal tension loading.

Abstract: A method of electroplating a crack-free hard chromium deposit comprises having present in the electroplating bath a complex halogen-containing compound which disassociates in an aqueous solution while maintaining the bond of a halogen in the complex. A plating voltage is used which periodically superimposes high voltage pulses on the base voltage.

Abstract: The invention is concerned with a motor for driving a centrifugal pump. The motor comprises a cylinder of circumferentially spaced axially disposed stator teeth; a stack of laminations forming a magnetic return path between the ends of the stator teeth at one end of the cylinder; a rotor in the form of a spherical segment which together with the other ends of the stator teeth defines a part spherical air gap at the other end of the cylinder; and a motor casing formed of a heat and electrically conducting non-magnetic material which radially encloses the stator teeth. The motor further comprises segments formed of a heat and electrically conducting non-magnetic material which are interleaved with the stator teeth and connected in a heat conducting manner to the casing and secured thereto against axial movement away from the rotor; the ends of the segments adjacent the rotor also define said part-spherical air gap with said rotor.

Abstract: In a process or a device for receiving or emitting solar energy a coating absorbing or emitting the sunlight is in thermally conductive communication with a crystalline storage mass having a phase change at a predetermined temperature.

Abstract: Apparatus and method for thermally discharging a heat storage accumulator containing a fusible storage substance the density of which is greater in the solid state than in the liquid state where the apparatus has means for creating a fluid vortex of the storage substance and scraper means for scraping crystallized storage substance off a heat sink portion of the accumulator such that crystallized storage substance is removed from the heat sink and transferred to the periphery of the accumulator.

Abstract: The stator of a rotating electrical machine consists of radially disposed pole teeth, a magnetic circuit closure core surrounded by these pole teeth and a winding, the coils of which are inserted between the pole teeth and envelop the core.

Abstract: An axial flow pump having a rotor pivotally supported on a spherical bearing surface where the rotor has axial impeller blades thereon arranged so that in operation of the pump, hydraulic forces will press the rotor onto the bearing surface.

Abstract: An energy transmission device through which energy may pass where the device has an optically active layer for absorbing or reflecting solar energy overlaid by a plurality of parallel extending U-shaped channels where the width of the channels is less than the height to prevent convection currents over the layer.

Abstract: The apparatus described comprises two rotating heat exchangers, which serve as a heat source and a heat sink respectively, and which are designed to act simultaneously as fans. Owing to a very small separation between the annular rotating heat-exchange surfaces, the fans function with extremely low noise. These heat exchangers form a unit with a casing rotatably supported in bearings and their heat-exchange surfaces communicate with the inside of the casing. An expansion engine is located inside the casing and may be designed as a high-speed turbine or as a high-speed displacement motor.

Abstract: An electric submersible pump having an electric motor forming a unit with the pump impeller and where the stator of the motor has 2 pm (p = number of pole pairs, m = number of phases) groups of coils, each group being subdivided into a plurality of coils of different width arranged symmetrically with respect to the axis of each group of coils and where the coils of each group are adapted to have different voltages applied thereto. The voltages imparted to the coils increase from the coil of smallest width to the coil of largest width by small amounts to eliminate arcing between adjacent conductors in the medium being conveyed. A portion of the liquid pumped by the impeller moves past the coils to provide cooling.The method of operating an asynchronous motor having a plurality of coils in the stator where each coil had a single turn winding comprising the steps of applying different voltages to the coils where the voltages between adjacent coils is less than that to cause arcing between adjacent coils.

Abstract: A heat exchanger for a thermodynamic machine, such as a heat pump or an expansion motor, comprises two corotating and coaxial sections, namely an evaporator section and a condenser section, interconnected by conduits in a closed circuit for the passage of a vaporizable working fluid. Each rotary section comprises an annular collector, centered on the axis of rotation, and an array of axially extending tubes closed at one end, the open tube ends being partly obstructed by barriers serving to retain a pool of liquefied working fluid by centrifugal force in an outer peripheral sector of each tube; the pool on the condenser side overflows into the corresponding collectors to form a reservoir for the liquid.

Abstract: An independently heated or cooled room is linked with an environment of different temperature through a fluid-circulation system including a closed path traversed by a heat-carrier medium. The medium travels between two heat exchangers, respectively located in the warmer and in the colder air, under a pressure differential low enough to maintain a coherent flow at substantially uniform speed in one or more pairs of channels extending between the two heat exchangers.

Abstract: A power plant, e.g. for an automotive vehicle, comprises a rotary heat exchanger and an engine mounted coaxially therewith on a stationary support, the engine having two relatively rotatable members (e.g. a turbine rotor and a turbine stator) driven in opposite directions by the vapor pressure of a working fluid passing in a closed circuit through an evaporator section of the heat exchanger, the engine housing, and a condenser section of the heat exchanger. One of the counterrotating members, generally the stator, is rigid with the housing whereas the other one is operatively coupled with a load, e.g. by magnetic flux traversing a magnetically pervious wall of the housing. The coupling may include an armature winding of an electric-current generator disposed outside the engine housing for excitation by one or more magnets carried by the rotor inside the housing. With a suitable step-down ratio between the load and the rotor, the latter may turn at a speed substantially higher than that of the stator.

Abstract: A motor car heater comprising a rotating heat exchanger which acts as the air blowing element and where the heat exchanger has a large number of annular fins which are traversed by axially running pipes and with supply and discharge channels in a hollow face wall of the exchanger.