Kuroda Shigeharu

Bio: Kuroda Shigeharu is an academic researcher. The author has contributed to research in topics: Hydraulic machinery & Electricity generation. The author has an hindex of 1, co-authored 1 publications receiving 6 citations.

Hydraulic power generation in small flow velocity and large quantity flowing water

Abstract: PURPOSE:To facilitate hydraulic power generation in small flow velocity and large quantity flowing water in which a water quantity is abundant and a depth of water is large like in a large river or an ocean current by carrying out the hydraulic power generation while combining the first energy system water in the vicinity of the water surface of the flowing water and the second energy system water in the vicinity of the water bottom of the flowing water with each other. CONSTITUTION:In flowing water, water having kinetic energy and potential energy flowed into a pressure pipe 1 from the vicinity of the water surface of the flowing water F, that is, the water in the first energy system and water having kinetic energy and pressure energy in the vicinity of the water bottom of the flowing water F, that is, the water in the second energy system are combined with each other, so that hydraulic power generation is carried out. A water intake section 2 to take the first energy system water into the pressure pipe 1 is provided in the vicinity of the water surface of the flowing water, and a water sucking section 3 to suck out the second energy system water into the flowing water from inside of the pressure pipe 1 is provided in the vicinity of the water bottom of the flowing water. A water wheel 4 is also provided inside of the pressure pipe 1, and a generator is rotated by this water wheel, so that power generation can be carried out. Thereby, while using an underwater fall in a large river, a tidal current or an ocean current in which a water quantity is abundant and a depth of water is large, the hydraulic power generation becomes possible.

Kinetic hydropower generation system and intake therefore

Abstract: A kinetic hydropower generation system has a turbine and a generator coupled to the turbine. An underwater intake nozzle assembly is fluidly coupled to the turbine. For one embodiment, an underwater tower nozzle may be fluidly coupled between the turbine and the underwater intake nozzle assembly. The underwater intake nozzle assembly may include a collector and a converging nozzle.

Intake assemblies for wind-energy conversion systems and methods

Abstract: An intake assembly for a wind-energy conversion system has a substantially vertical converging nozzle, an object extending into the nozzle, and a converging flow passage between the object and the nozzle. For some embodiments, the object may be another nozzle. There may be vanes in one or both nozzles in further embodiments. The object may be configured to move in yet other embodiments.

Method and device for using the gravitational total pressure energy of a flowing fluid

Abstract: A basic method of the present invention for using the gravitational total pressure energy of a flowing fluid comprises the steps of disposing a pressure pipe having a water mill or a windmill provided therein in a flowing fluid under the atmospheric pressure or in an object moving in a fluid under the atmospheric pressure, gradually reducing the cross-sectional area of the pressure pipe, while circumferentially deflecting it, toward the water mill or windmill from its inlet port and outlet port, supplying to a predetermined supply position on a downstream side of the water mill or windmill in the pressure pipe a flow rate maintaining kinetic energy which is the kinetic energy of a flow velocity produced when a predetermined flow rate of fluid passes through the supply position and a resistance cancelling pressure difference PD2 cancelling to zero a total resistance generated when the predetermined flow rate of flowing fluid passes in the pressure pipe from the supply position to the outlet port, and supplying to a position in the pressure pipe which is upstream of the water mill or windmill outlet a resistance cancelling pressure difference PD1 cancelling a total resistance generated when the predetermined flow rate of flowing fluid passes in the pressure pipe from the inlet port to the supply position and a gravitational dynamic pressure replenishing pressure corresponding to the gravitational dynamic pressure of the flowing fluid in the vicinity of the outside of the outlet port, whereby perpetual motion of the third kind is realised.

Marine power generating system

Abstract: [Problem] To provide a marine power generation system that creates the water flow necessary for hydropower generation and thus generates power, by using the large amount of energy of ocean currents, even when the flow speed thereof is insufficient. [Solution] A marine floating body (10) on the ocean has an aperture part (11) that takes in seawater. The seawater is guided into the interior of the marine floating body (10) through a water conduit (20). The water conduit (20) is provided with a generator (30) that generates power by means of water pressure caused by the pressure of the ocean currents and differences in the falling of the water level in the water conduit (20). A reservoir space (40) in the interior of the marine floating body provides a space for taking in the seawater. This reservoir space (40) is beneath the ocean surface. The seawater taken into the reservoir space (40) is discharged to the outside of the reservoir space (40) by a discharge unit (50). When the marine floating body (10) is as large as an ultra-large tanker, the resulting structure is similar to a large dam provided near the ocean, with seawater spraying into the interior from the aperture part (11) provided in the bow section which forms large wall surfaces, and hydropower can be generated in the manner of a large dam.

Method and device for using gravity total pressure energy of flowing fluid

Abstract: In the basic type of method for using gravity total pressure energy of flowing fluid according to the present invention, perpetual motion of the third kind is realized by placing a pressure tube having at a central portion thereof an axial flow water wheel or a windmill having a form similar to the axial flow water wheel in flowing fluid under atmospheric pressure, reducing the cross section of the pressure tube both from inlet and outlet ports towards the water wheel or windmill while deflecting the cross section in a circumferential direction, supplying to a position near the inlet port where the cross section is larger a resistance offsetting pressure difference for offsetting all the pressures generated when a predetermined volume of flowing fluid passes through the pressure tube to zero, supplying from the outlet of the water wheel or windmill towards the upstream side a gravity dynamic pressure supplementing pressure corresponding to the gravity dynamic pressure of flowing fluid near outside the outlet port of the pressure tube, and supplying to the position near the inlet port where the cross section is larger flow rate maintaining kinetic energy which is kinetic energy of a flow rate obtained when the predetermined volume of fluid passes through the supply position thereof.