• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a mains-connected, small-scale device for alternately receiving and delivering electricity for buying and selling energy depending on the prevailing price picture for electricity, comprising a buffer storage (6) for energy and one electricity generator driven by a motor (1) with energy from the buffer storage. (G) for the supply of electricity to the grid (N). According to the invention, the motor consists of a displacement type steam motor (1) provided with a drive shaft (D1) and the buffer layer of a steam buffer (6), which is connected between the steam engine high temperature part, a steam line (4) and low temperature part, a feed water line ( 7). Storage of steam in the steam buffer (6) is effected by driving the drive shaft of the steam motor (1) in a certain forward direction by means of an electric motor (M) connected to the mains while the steam motor is set for operation in the opposite direction, i.e. reversing, with high pressure steam and high temperature is fed back from the steam engine inlet to the steam line (4) and the steam buffer (6).
    公开号:SE1400123A1
    申请号:SE1400123
    申请日:2014-03-07
    公开日:2015-09-08
    发明作者:Peter Platell
    申请人:Ranotor Utvecklings Ab；
    IPC主号:
    专利说明:

    2 drive of the steam motor drive shaft in the determined forward direction by means of an electric motor connected to the mains while the steam motor is set for operation in the opposite direction, ie reversing, whereby steam with high pressure and high temperature is fed back from the steam motor inlet to the steam line and steam buffer. The steam engine runs like a compressor, and it can become steam with a very large increase in pressure and temperature, which is discharged from the inlet of the steam engine. In order to limit this, according to a preferred embodiment of the invention, a line connected from the feed water line to the inlet of the steam engine with a metering pump is arranged to spray feed water into the steam engine inlet synchronously with the steam engine setting for reversing.
    When the steam engine is driven as a motor, the condenser with air cooling can be kept at a temperature of about 80 degrees, but when charging the buffer bearing, and especially when the buffer bearing is fully charged, when the steam motor is driven by the electric motor, ie works as a compressor in a heat pump device, the condenser temperature is significantly higher . By designing the condenser as a water-cooled heat accumulator, the cooling water can advantageously be used for heating purposes, e.g. in an existing house in connection with the small-scale device, entailing an improved economic return when using the device according to the invention.
    A suitable simplification of the device consists in using instead of an electric generator and an electric motor, ie two separate machines, a per se well-known electric device which functions alternatively as an electric motor and electric generator.
    Brief description of the drawing. The invention is further elucidated in the following with reference to the accompanying drawing, which schematically shows an embodiment of a device according to the invention.
    Description of a preferred embodiment.
    The drawing shows a steam engine 1 of the axial piston engine type known from patent specification US5,875,635, i.e. of the displacement type, which is suitable for use in the small-scale device according to the invention, and which has a centrally located, axially displaceable, rotating valve 2, which controls steam supply with the pressure 250 bar and the temperature 500 degrees Celsius from a steam generator 3 via a line 4 to all cylinders 5 in turn in the steam engine 1. A well heat-insulated steam buffer 6 is connected between the line 4 and a 3 line 7, which leads feed water with a temperature of about 80 degrees C and the pressure 250 bar to the steam generator 3. The steam buffer 6 is described in detail in U.S. Pat. No. 5,867,989, to which reference is made as to the details of the steam buffer. This steam buffer is provided with a high temperature connection for steam, suitably with about 500 degrees C and the pressure 250 bar, and a low temperature connection. about 80 degrees C, for feed water and in between a solid heat exchange material with a large number of pressure-resistant flow paths with a hydraulic diameter less than about 0.5 mm for the steam and feed water between the two connections. It has been found that with such a dimensioning an energy density of about 500 kJ / kg and a power density of about 100 kW / kg total weight of the steam buffer can be achieved, which can be compared with corresponding values for, for example, a lead accumulator, which is 100 kJ / kg resp. . only 100 W / kg. With a steam temperature of 800-900 degrees C and the use of ceramic material for the steam buffer, an energy density of up to about 1 MJ / kg can be achieved. The steam supply during normal steam engine operation to each of the different cylinders 5 takes place when its respective pistons 5 reach the upper dead center. When the piston in a cylinder has reached there, a triangular hole 8 of the valve 2 has just reached the inlet hole of the cylinder in question and thus provides access for the high-pressure steam to the cylinder in question in a known manner. As the motor shaft D of the steam engine rotates further, and with that valve 2, the piston begins to leave the upper dead position and on its way to the lower dead position while filling the cylinder, the other edge of the valve hole will close the steam supply so that the trapped steam can expand.
    The expanded steam is discharged through outlet 13, which in a manner not shown is connected to a common outlet line 14 to a condenser 15, which is enclosed by a heat-insulating housing 16 and contains steam and feed water with a temperature of about 80 degrees.
    The contents of the condenser must be cooled in order to maintain this low temperature, and since the device according to the invention is based on buying and selling energy in an advantageous manner, it is advantageous to utilize as much as possible of the energy which must be cooled away.
    This is done by discharging the sufficiently hot water in the condenser (15) for heating purposes through a line 20 to a heating device 21 in a housing 22 belonging to the small-scale device according to the invention and again to the condenser through a return line 23. In that case further cooling of the condenser would be required, there is also an external cooler 24 connected to the lines 20, 23 with a fan 25 for cooling to ambient air.
    The valve 2 can be displaced axially in a known manner, whereby it is possible to use different parts of the hole 8 and a further hole 9 of the valve and thereby obtain different filling for both driving and braking and rotation of the motor shaft D1 both in one direction and in the opposite direction. . The motor shaft D1 is connected to the drive shaft D2 to an electrical apparatus GM, which during the rotation of the motor shaft D1 in the said, determined forward direction functions as a generator and via a switch 26 in its first position supplies electricity to a mains N. This is used when you can get good paid for delivery to the network N.
    With the switch 26 in a second position, electric current is supplied from the network N to an input of the electrical apparatus GM, which thereby functions in a known manner as a motor and drives the drive shaft D2 and thus the motor shaft D1 in the said, determined forward direction.
    This latter mode is used when power can be obtained from the network N at low cost. The steam engine valve 2 is adjusted to brake the motor shaft D1, whereby high-pressure steam will have access to the cylinders 5 in order during the movement of its pistons towards the upper dead center position. Steam under very high pressure and high temperature will then be pushed back to the line 4 and the steam buffer 6 for storing hot steam in the steam buffer. However, the steam temperature becomes impractically high and requires a steam buffer of ceramic material. A reduction of the steam temperature is ensured by feeding water with a temperature of about 80 degrees from the line 7 through a line 12 to a metering pump 11 and further through a line 10 to the inlet to the cylinders 5. This operation with the steam engine works very economically as a compressor in a heat pump circuit can be used only as long as the steam buffer can receive energy. Then the energy must go to the condenser in a suitable way.
    权利要求:
    Claims (4)
    [1]
    Electrical network connected, small-scale device for alternating reception and delivery of electricity for the purchase and sale of energy depending on the prevailing price picture for electricity, comprising a buffer storage for receiving and storing energy and an electric generator powered by a motor with energy from the buffer storage for delivery of electricity to the mains, characterized in that the electricity generator (G) is driven in a determined forward direction by an output drive shaft from a steam motor (1) of displacement type included in a steam engine system comprising a steam generator (3) with a steam line (4) for high-pressure, high-temperature steam to the steam engine (1), which has an outlet for steam (13) to a condenser (15), from which a high-pressure feed water line (7) leads to the steam generator (3), the buffer layer being a steam buffer (6), which is connected between the steam line (4) and the feed water line (7), and that the storage of steam in the steam buffer (6) is effected by driving the drive shaft of the steam engine in the determined front the direction by means of an electric motor (M) connected to the mains while the steam motor is set for operation in the opposite direction, ie reversing, whereby steam with high pressure and high temperature is fed back from the steam motor inlet to the steam line (4) and the steam buffer (6).
    [2]
    Device according to claim 1, characterized in that a line (10, 12) connected from the feed water line (7) to the steam engine (1) with a metering pump (11) is arranged to spray synchronously with the setting of the steam motor (1) for reversing feed water into the steam engine inlet.
    [3]
    Device according to Claim 1 or 2, characterized in that the condenser (15) is designed as a heat-insulated, water-cooled heat accumulator, where the cooling water is used for heating purposes in a housing adjacent to the small-scale device.
    [4]
    Device according to one of Claims 1 to 3, characterized in that the electric generator (G) driven by the steam motor is designed to be able to operate alternatively as an electric motor (M) with an unchanged direction of rotation.
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    同族专利:
    公开号 | 公开日
    SE542418C2|2020-04-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1400123A|SE542418C2|2014-03-07|2014-03-07|Electrical network connected device for alternating reception and delivery of electricity|SE1400123A| SE542418C2|2014-03-07|2014-03-07|Electrical network connected device for alternating reception and delivery of electricity|
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