Abstract:
The present invention provides a controller for a pendulum type wave-power generating apparatus. Electric power produced by wave-power generation has been pointed out as being of low efficiency and more expensive than wind-power generation. To overcome the above problems, the present invention uses resonance and impedance matching of the sea waves, thus making it possible to markedly enhance the efficiency of wave-power generation. The present invention does not use a wave-height meter which is generally expensive and controls the generating apparatus in response to variation of the conditions of the sea, thus automatically maintaining the resonance and impedance matching operation, thereby making high-efficiency operation possible. As a result, the cost of the wave-power generation can be reduced, so that the wave-power generation can be widely commercialized.
Abstract:
A floating marine structure which includes a first float disposed at the center and a plurality of second floats disposed around the first float, where the first float has a floating body made of a floatable material in a polygonal prism shape, a damping unit coupled to the bottom of the floating body at the center, having the same cross-section as the floating body, having a cross-sectional area larger than the cross-sectional area of the floating body, and reducing a shake of the first float in the sea, and at least one coupling hole formed at each side of the floating body. The second float has the same shape as the floating body and has coupling protrusions formed at sides facing the sides of the floating body and inserted in the coupling holes, and wherein the coupling holes are formed at alternate sides of the floating body.
Abstract:
A long distance dredged soil transport system includes a pump module including a pump for generating a compressed air and a plug flow flowing by dividing an inner state of a pipeline to a gaseous unit and a liquefied unit by introducing the generated compressed air into the pipeline by being interlinked to one lateral surface of the pipeline, a pipe module wound with a coil to apply an electromagnetic wave to the liquefied unit and including a plurality of pipelines, database stored with flow information on flow velocity and flow form in response to physical properties of liquefied unit, and a control module communicating with the pipe module, the pump module and the database and applying, to the coil, a waveform of a current matching to a flow waveform of the liquefied unit transported inside the pipeline, and a control method thereof.
Abstract:
There is provided a high efficiency ocean thermal difference power generating system by using liquid-vapor ejector and motive pump comprising: an evaporator for changing transferred refrigerant liquid into refrigerant vapor with high temperature and high pressure by the thermal exchange with surface seawater; a vapor-liquid divider which is installed at the outlet part of the evaporator and divides the refrigerants to liquid-state refrigerant and vapor-state refrigerant respectively; a distributor which is installed at the inlet of the evaporator and distributes the refrigerants flowed into the evaporator to multi-paths; a turbine for generating electric power by using the high pressure refrigerant vapor transferred from the liquid-vapor divider or the evaporator; a motive pump for increasing the pressure of the refrigerant liquid distributed from the distributor or the liquid-vapor divider; a liquid-vapor ejector for mixing the low pressure refrigerant vapor which passed the turbine and the high pressure refrigerant liquid which passed a motive pump, thereby proceeding expansion and compression; a condenser for condensing the refrigerants which was mixed in the liquid-vapor ejector by the thermal exchange with deep seawater; and a refrigerant circulation pump for increasing the pressure of the refrigerants which was condensed in the condenser up to the evaporation pressure and for circulating.
Abstract:
Disclosed is an underwater exploration system using a multi-joint underwater robot having a novel complex movement concept in which the multi-joint underwater robot moves through walking or swimming with multi-joint legs closely to a seafloor, differently from a conventional underwater robot to obtain a thrust through a propeller scheme. The underwater exploration system includes the multi-joint underwater robot having the complex movement function according, a depressor, and a mother ship to store data of an underwater state transmitted from the multi-joint underwater robot and to monitor and control a movement direction of the multi-joint underwater robot. The depressor is connected to the mother ship through a primary cable, the multi-joint underwater robot is connected to the depressor through a second cable, and resistance force of the primary cable is applied to the depressor without being transmitted to the multi-joint underwater robot.
Abstract:
A long distance dredged soil transport system includes a pump module including a pump for generating a compressed air and a plug flow flowing by dividing an inner state of a pipeline to a gaseous unit and a liquefied unit by introducing the generated compressed air into the pipeline by being interlinked to one lateral surface of the pipeline, a pipe module wound with a coil to apply an electromagnetic wave to the liquefied unit and including a plurality of pipelines, database stored with flow information on flow velocity and flow form in response to physical properties of liquefied unit, and a control module communicating with the pipe module, the pump module and the database and applying, to the coil, a waveform of a current matching to a flow waveform of the liquefied unit transported inside the pipeline, and a control method thereof.
Abstract:
Disclosed is a container fixing holder of a time-series sediment trapping device. With respect to the container fixing holder of the time-series sediment trapping device, the time-series sediment trapping device includes a funnel; a frame disposed to support and surround the funnel, a frame having at least one rod vertically disposed and a fixing plate coupled to the at least one rod forming the frame on a horizontal plane defined by a lower portion of the funnel, wherein a rotation plate, to which a plurality of time-series sediment trapping containers to trap the time-series sediment collected through the funnel are fixedly attached, is formed under the fixing plate. The container fixing holder includes a circular holder for fixing the plurality of time-series sediment trapping containers fixedly attached to the rotation plate without shaking.
Abstract:
A cold-adapted protease derived from Pseudoalteromonas arctica PAMC 21717 or a recombinant cold-adapted protease obtained by expressing a gene encoding the cold-adapted protease in E. coli is described, and more particularly, a crystal of a protease exhibiting activity at low temperatures, a method for crystallizing the protease, a method for preparing the protease, a recombinant microorganism that expresses the protease, a method for preparing the recombinant microorganism, a method for preparing the recombinant protease and the use of the cold-adapted protease. The cold-adapted protease exhibits high activity at low temperatures, and securely maintains its enzymatic activity even in the presence of high pH, various metal ions and surfactants. Thus, it is useful in various industrial applications.
Abstract:
The present invention provides Thermococcus onnurineus MC02 strain (accession no. KCTC12511BP) having increased hydrogen production ability, wherein the expression of rchA gene of the strain increases. Also, the present invention provides a method for producing the strain belonged to the genus Thermococcus having increased hydrogen production ability comprising, increasing the expression of rchA gene of the strain, and hydrogen production method using the strain.
Abstract:
Disclosed is a buffer system for mining a deep seafloor mineral resource. The buffer system includes a hopper part that introduces and stores a crushed mineral resource to discharge the crushed mineral resource upward, a first pipe that communicates with an upper portion of the hopper part to introduce the mineral resource, a feeder part provided under the hopper part to discharge the mineral resources upward, a second pipe that communicates with the feeder part and lifts the mineral resource, a hydraulic part provided under the hopper part to convert power received from a surface boat into hydraulic power to operate at least one actuator and a driving motor to introduce the mineral resource into the first pipe, and a structure frame coupled to a lifting pipe to transmit an external load applied to the buffer system, and constituting an external frame of the buffer system to protect internal units.