Abstract: A heat pump includes an electric motor driven by input electric power, a first compressor mechanically connected to the electric motor and compresses air, a first heat exchanger performing heat exchange between compressed air produced by the first compressor and water, and a first hot water outlet through which the water heated by heat exchange in the first heat exchanger is taken out. Thus, in the air refrigerant heat pump, it is possible to use only air and water to supply heating by applying part of compressed air energy storage technology to the heat pump.

Abstract: A compressed fluid storage power generation device including a compressor and compressor bodies for compressing a working fluid; a pressure accumulation tank for storing the working fluid compressed by the compressor bodies; a power generator having expanders which are driven by the working fluid and a power generator body which is driven by the expanders; high-temperature heat recovery units for recovering heat from the working fluid flowing from the compressor bodies into the pressure accumulation tank; high-temperature heating units for heating, with the recovered heat, the working fluid flowing from the pressure accumulation tank into the expanders; a low-temperature heat recovery unit for recovering heat generated in a low-temperature heat generation section of the compressor and/or power generator into a low-temperature heat carrier; and low-temperature heating units for heating the working fluid by means of heat exchange with the low-temperature heat carrier carrying the heat recovered by the low-tempe

Abstract: A compressed air energy storage and power generation device comprises a motor, a compressor, a pressure accumulation tank, an expander, and a generator. The motor is driven by a fluctuating input power. The compressor is mechanically connected to the motor and compresses air. The pressure accumulation tank is fluidly connected to the compressor and stores air compressed by the compressor. The expander is fluidly connected to the pressure accumulation tank and is driven by compressed air supplied from the pressure accumulation tank. The generator is mechanically connected to the expander and generates power to be supplied to a user. A cooling water flow path, whereby water flows inside a cooling water pipe for cooling air that is a working fluid, is provided inside a casing of the compressor. As a result, a compressed air energy storage and power generation device can be provided that is capable of efficiently reducing compressive axial force and of reducing power consumption.

Abstract: A container-type compressed air storage power generation device (2) comprises compressors (5a-5c); a tank (8); power generators (9a-9c); a control device (12); and a container (4). The compressors (5a-5c) compress air. The tank (8) is driven by air supplied from the compressors (5a-5c). The power generators (9a-9c) are driven by air supplied from the tank (8). The control device drives and controls the compressors (5a-5c) and the power generators (9a-9c). The container (4) houses the compressors (5a-5c) and the power generators (9a-9c), and the tank (8) is disposed outside the container (4). Therefore, the container-type compressed air storage power generation device (2) is easy to transport and construct on-site.

Abstract: A compressed air energy storage power generation device equipped with: a compressor mechanically connected to a motor; a first pressure storage tank storing compressed air from the compressor; an expansion device driven by compressed air from the tank; a generator mechanically connected to the expansion device; a first heat exchanger that exchanges heat between a heat medium and the compressed air supplied from the compressor to the tank; a second heat exchanger that exchanges heat between the heat medium and the compressed air supplied from the tank to the expansion device; a pressure sensor that detects the state of charge (SOC) of the tank; SOC adjustment units that adjusts the SOC; and a control device. The control device controls the SOC adjustment units such that the detected SOC is within an optimal SOC range while satisfying the requested power.

Abstract: A compressed air storage power generation apparatus is provided with a motor, a compressor, a pressure accumulation tank, an expander, a generator, a first heat exchanger and a cold heat extracting unit. The motor is driven by input power generated using renewable energy. The compressor is mechanically connected to the motor and compresses air. The pressure accumulation tank accumulates the compressed air compressed by the compressor. The expander is driven by the compressed air supplied from the pressure accumulation tank. The generator is mechanically connected to the expander. The first heat exchanger exchanges heat between the compressed air supplied from the compressor and a heat medium and cools the compressed air to room temperature. The cold heat extracting unit extracts air serving as working fluid as cold air of the room temperature or lower.

Abstract: A compressed air energy storage power generation device includes a first heat exchanger, a heat storage tank, a second heat exchanger, a heating unit, a first power distributor, and a controller. The first heat exchanger performs heat exchange between the compressed air from a compressor and the heating medium. The heat storage tank stores the heating medium heatexchanged by the first heat exchanger. The second heat exchanger performs heat exchange between the compressed air from an accumulator tank and the heating medium from the heat storage tank. The first power distributor distributes the generated power of the power generator to a power system and the heating unit. When the internal pressure of the accumulator tank reaches a predetermined pressure and the generated power is larger than the power demand, the controller supplies a part or all of the generated power to the heating unit by the first power distributor.

Abstract: A compressed air energy storage power generation device 2 includes a compressor, a pressure accumulator tank, and an expander. The compressor compresses air by being driven with renewable energy. The pressure accumulator tank stores the air compressed by the compressor. The expander is driven by the compressed air. A power generator is mechanically connected to the expander and generates electric power, which is to be supplied to a demander.

Abstract: A compressed-air storage and power generation method according to the present invention is provided with: a first air-compression step; a first air-storage step; a first air-supply step; a first power-generation step; a first heat-exchange step; a heat-medium storage step; a second heat-exchange step; and an air-discharge step. In the air-discharge step, when the amount of compressed air stored in a pressure-accumulation tank (12) exceeds a prescribed amount in the first air-storage step, the air compressed by a first compressor (10) is discharged outside without being stored in the pressure-accumulation tank (12). Therefore, it is possible to provide a compressed-air storage and power generation method by which fluctuating electrical power can be smoothed efficiently even after compressed air is stored up to the storage capacity of the storage space.

Abstract: In a compressed air energy storage and power generation device, a compressed air energy storage and power generation method defines, as a reference storage value, a storage value indicating that a storage amount of air in an accumulator tank is in a predetermined intermediate state. At the reference storage value, at least one of a motor and a generator rotates at a rated rotation speed. When a storage value indicating a current storage amount in the accumulator tank is larger than the reference storage value, at least one of the motor and the generator is controlled to rotate at equal to or less than the rated rotation speed. When the storage value indicating the current storage amount in the accumulator tank is smaller than the reference storage value, at least one of the motor and the generator is controlled to rotate at equal to or more than the rated rotation speed and equal to or less than a maximum permissible rotation speed.

Abstract: A container-type compressed air storage power generation device (2) comprises compressors (5a-5c); a tank (8); power generators (9a-9c); a control device (12); and a container (4). The compressors (5a-5c) compress air. The tank (8) is driven by air supplied from the compressors (5a-5c). The power generators (9a-9c) are driven by air supplied from the tank (8). The control device drives and controls the compressors (5a-5c) and the power generators (9a-9c). The container (4) houses the compressors (5a-5c) and the power generators (9a-9c), and the tank (8) is disposed outside the container (4). Therefore, the container-type compressed air storage power generation device (2) is easy to transport and construct on-site.

Abstract: A compressed fluid storage power generation device including a compressor and compressor bodies for compressing a working fluid; a pressure accumulation tank for storing the working fluid compressed by the compressor bodies; a power generator having expanders which are driven by the working fluid and a power generator body which is driven by the expanders; high-temperature heat recovery units for recovering heat from the working fluid flowing from the compressor bodies into the pressure accumulation tank; high-temperature heating units for heating, with the recovered heat, the working fluid flowing from the pressure accumulation tank into the expanders; a low-temperature heat recovery unit for recovering heat generated in a low-temperature heat generation section of the compressor and/or power generator into a low-temperature heat carrier; and low-temperature heating units for heating the working fluid by means of heat exchange with the low-temperature heat carrier carrying the heat recovered by the low-tempe

Abstract: A compressed air storage and power generation device (1) is provided with motors (3a-3c), compressors (4a-4c), compressed air storage tanks (5a-5c), injection-side valves (6a-6e), expanders (7a-7c), discharge-side valves (8a-8e), generators (9a-9c), an output sensor (10), pressure sensors (11a-11c), and a control device (12). The control device (12) uses a tank (5c) with a relatively large capacity for long-period variable power and uses tanks (5a, 5b) with relatively low capacities for short-period variable power, all such power having been generated using natural energy, and thereby performs control by which both the long-period and short-period variable power are leveled out and power is output according to the power demand. The compressed air storage power generation device (1) levels out both the long-period and short-period variable power and outputs the power according to the power demand.

Abstract: A screw compressor has a balance bearing whose outer ring is movable relative to the casing. A balance piston divides a balance cylinder into a high pressure fluid chamber and a low pressure fluid chamber, and movement of the piston in the balance cylinder is transmitted to the outer ring of the balance bearing. The high pressure fluid chamber and the low pressure fluid chamber are arranged such that higher pressure fluid in the high pressure fluid chamber urges the piston to press the outer ring of the balance bearing oppositely to a spring and toward the main thrust bearing, and lower pressure fluid in the low pressure fluid chamber urges the piston to press the outer ring of the balance bearing away from the main thrust bearing.

Abstract: A screw compressor of the present invention includes a pair of male and female screw rotor meshed with each other and rotatably accommodated in a casing, the screw rotors being adapted to suction, compress and discharge a fluid, a main thrust bearing having an inner ring fixed to a rotor shaft serving as a rotation shaft of at least one of the screw rotors and an outer ring fixed to the casing, the main thrust bearing being adapted to receive thrust force of the rotor shaft, a balance bearing having an inner ring fixed to the rotor shaft and an outer ring movable relative to the casing, a bearing holding member for holding the outer ring of the balance bearing, and fluid pressure application means for pressing the bearing holding member toward the discharge side by fluid pressure. With such arrangement, it is possible to reduce a thrust load of the rotor shaft, and eliminate risks of an increase in a rotational load by a balance piston and seal leakage of the balance piston.

Abstract: There is provided an electric power generating device which includes a generator which is constituted by an interior permanent magnet (IPM) synchronous generator, and is connected to a steam turbine without interposition of a reduction gear, cooling means which flows a liquid coolant used to cool the generator, and a frequency converter which converts an electric power generated by the generator into an electric power at a commercial frequency, and outputs the converted electric power, the cooling means includes a circulation passage to which a tank which is used to store the liquid coolant (oil), a cooler which cools the liquid coolant, and a pump which pressure-feeds the liquid coolant are connected, and through which the liquid coolant circulates, and this configuration enables the generator to operate at a high rotational speed, thereby efficiently utilizing the steam energy.

Abstract: There is provided an electric power generating device which includes a generator which is constituted by an interior permanent magnet (IPM) synchronous generator, and is connected to a steam turbine without interposition of a reduction gear, cooling means which flows a liquid coolant used to cool the generator, and a frequency converter which converts an electric power generated by the generator into an electric power at a commercial frequency, and outputs the converted electric power, the cooling means includes a circulation passage to which a tank which is used to store the liquid coolant (oil), a cooler which cools the liquid coolant, and a pump which pressure-feeds the liquid coolant are connected, and through which the liquid coolant circulates, and this configuration enables the generator to operate at a high rotational speed, thereby efficiently utilizing the steam energy.

Abstract: A screw compressor to enable prevention of contact between a slide valve and screw rotors. The screw compressor comprising a capacity controlling slide valve 3 provided for advance and (or) retreat through a piston rod 6 by a piston 5 operated by fluid pressure arranged on the discharge side to adjust the size of a diametral opening of screw rotors 1, 2 on the suction side, the screw compressor including projections 8 extending in parallel with axes of the screw rotors 1, 2 from a position distanced from the screw rotors 1, 2 at the end on the suction side of the slide valve 3, and a support portion 10 which comes in relatively slidably contact with surfaces 9 on the axial side of the screw rotors 1, 2 of the projections 8 which advance and retreat along with the slide valve 3 to support the projections 8.

Abstract: An oil injection type screw compressor which includes an oil tank for separating lubricating oil from gas discharged from a compressor body and collecting the thus separated lubricating oil is constituted such that the oil tank has a substantially L-shaped vertical section composed of a base portion and a column portion provided uprightly on the base portion such that a spacing in the base portion located above an oil storage portion at a lower location in the base portion is formed such that it extends from an upper portion in the base portion to the inside of the column portion, and an oil separating element is provided on the inner side of an exit of gas at an upper portion of the column portion while the compressor body is disposed on the base portion.

Abstract: To enable the prevention of smearing an equipment and its periphery with lubricating oil, the alleviation of a burden in maintenance of the equipment by reducing a decrement of the lubricating oil, and the lowering of running cost, an oil-cooled compressor has a suction control valve 5 in a suction passage 3 and an air discharge valve 9 in a discharge passage 6 in a compressor body 1. An oil discharge passage 16 is formed for leading outside the lubricating oil supplied to bearing and shaft seal sections of the compressor body 1, an oil return passage 17 communicating with the inlet side of the suction control valve 5, an oil reservoir section 18 located between the oil discharge passage 16 and the oil return passage 17, and an air discharge passage 19 arranged with one end connected to the outlet port of the air discharge valve 9 and its another end reaching the oil reservoir section 18.