47results about How to "Reduce delivery power" patented technology

There is provided a method of operating a wind power installation. Under first operating conditions in a normal operating mode the wind power installation delivers a first power to a connected electrical network. That first power is proportional to the wind speed. The wind power installation is controlled in such a way that upon the occurrence of a disturbance it remains on the connected electrical network and delivers to the connected electrical network a second power which is lower than the first power. Upon cessation of the disturbance and under the first operating conditions a third power is briefly delivered to the connected electrical network, the third power being significantly higher than the first power.

The invention provides devices and systems, as well as associated methods of using them, that employ a remote Dicke switching element—i.e., distal to a radiometer. The devices, systems, and methods are suitable for both diagnostic and therapeutic applications in a wide variety of tissues.

The invention discloses a method for controlling AC faults at receiving ends of a hybrid HVDC transmission system. The method comprises the following steps: measuring DC voltage at LCC side of a linerectifier converter to obtain DC voltage value; When the DC voltage on the LCC side of the line rectifier converter is higher than 1.05 pu, changing the control strategy of the hybrid HVDC system fromconstant current control to maximum trigger angle control; Measuring the DC current on the LCC side of the line rectifier converter to obtain the DC current value; Judging whether the DC current value is greater than the DC current intermittent setting value; When the DC current value is greater than the DC current intermittent setting value, keeping a control strategy of maintaining a maximum trigger solution control; Adjusting the trigger angle of the line rectifier LCC side according to the instantaneous power of the voltage source converter VSC side after receiving the AC system operationsignal of the voltage source converter VSC side; After receiving the VSC side AC system fault clearing signal of the voltage source converter, switching to the control strategy of constant current control.

The invention relates to a method for operating a fuel pump in order to guide fuel from the fuel container of an internal combustion engine, wherein the electric energy, which is in the form of pulses, is periodically guided to the fuel pump and the duration of the pulses is controlled according to the fuel required by the internal combustion engine. The frequency of the pulses is controlled in such a manner that, in the event of low pump capacity of the fuel pump, the frequency is controlled to a higher level than in the even of a high pump capacity.

An object of the present invention is to easily reduce dust having large particle diameter that affects blocking and abrasion to prevent deposition thereof in a reactor. An exhaust gas NOx removal apparatus comprises a NOx removal rector having a catalyst layer for removing nitrogen oxides in a combustion exhaust gas; a duct structure having a stab-up point at which a flow of the exhaust gas changes from a horizontal direction to a vertical direction in an exhaust gas duct on the upstream side of the NOx removal reactor; a tilt thin plate slit in which a number of thin plates are disposed in the duct of the horizontal direction of an inlet of the stub-up point or/and in an inlet of the catalyst layer in the NOx removal reactor in a vertical direction with a slit width smaller than an opening width of the catalyst layer at a predetermined inclination angle relative to the cross-section of an exhaust gas flow path; and a dust collecting/discharging portion attached to the lower end of a tilt thin plate slit.

The invention belongs to the field of power system automation, and provides a high-reliability self-energy-obtaining circuit based on an energy-obtaining current transformer with an iron core. The high-reliability self-energy-obtaining circuit comprises a specially-made energy-obtaining CT, a rectifying circuit unit, a short-circuit current bypass and energy-obtaining balance regulation circuit unit, an energy storage circuit unit, an overvoltage protection and energy-obtaining balance control circuit unit, a self-energy-obtaining circuit self-starting and storage battery control circuit unit,a DC/DC module power supply and the like. The overvoltage protection and energy-obtaining balance control circuit unit is configured to couple a primary system with a strong interference bypass at asecondary side when the system generates short-circuit faults or is stroke by lightening to prevent the energy-obtaining CT iron core from saturation; the energy-obtaining balance regulation circuit unit employs a dynamic energy-obtaining mode of supply change with demand to automatically regulate the self-obtaining power so as to achieve balance between supply and demand; and moreover, the self-energy-obtaining circuit self-starting and storage battery control circuit unit is configured to perform effectively power supply management.

The invention relates to a welding torch (10) having a torch body (46) in which at least one device (32) for feeding a welding wire (13) and a contact tube (30) having a bore (33) and a guide bore (34), running concentrically thereto, for guiding the welding wire (13) in the direction of a workpiece (16) are arranged, wherein the welding wire (13) can be supplied with electrical energy via the contact tube (30), wherein one end of the feed device (32) is arranged in the guide bore (34) of the contact tube (30) and is provided with an electrically conductive end piece (36) having a bore (40) for the welding wire (13). To provide such a welding torch (10) in which the durability or the service life of the wearing parts, in particular of the contact tube (30), is prolonged, provision is made for the end piece (36) of the feed device (32) to be movably arranged in the guide bore (34) of the contact tube (30).

Provided is an air conditioner wherein it is possible to conserve energy and to ensure safety with regard to the refrigerant. Disclosed is an air conditioner equipped with: a heat medium exchanger (3) disposed within a space (8) in a building (9), which is different from the space in which the air is conditioned, and provided with inter-heat medium heat exchangers (15a, 15b) which exchange the heat between a flammable refrigerant and a heat medium that is different from the refrigerant, and a housing (50) which houses the inter-heat medium heat exchangers (15a, 15b), and has an air vent (24) that allows air to flow through the housing space and the outside of the housing space; one or more outdoor units (1) which circulate the refrigerant by being connected to the heat medium exchanger (3) via a pipe, and which are disposed on the outside of the building (9) or an outdoor space (6) within the building (9), which leads to the outside of the building (9); and one or more indoor units (2) which are connected to the heat medium exchanger (3) via a pipe by means of a different system from the outdoor units (1), and which are provided with a use-side heat exchanger (26) which exchanges the heat between the heat medium and the air in the indoor space (6) by circulating the heat medium.

The invention discloses an air-conditioning heat exchanger which comprises an outer pipe and an inner pipe, wherein the outer pipe is a straight pipe, the inner pipe is a spiral pipe, and the outer pipe and the inner pipe are mutually sleeved. The inner wall of the outer pipe and the outer spiral wall of the inner pipe are enveloped to form a spiral pipeline, a refrigerant enters through an inlet of the spiral pipeline and flows across the spiral pipeline, a refrigerating intermediate medium relatively flows in the inner pipe, the refrigerant exchanges heat with the intermediate medium through the wall of the inner spiral pipe, and the thread pitch of the inner spiral pipe is designed as gradual change according to the change situation of volume and pressure drop caused by the phase change of the refrigerant in the heat exchange process. Through the gradual change design for the thread pitch of the inner spiral pipe of the heat exchanger, a refrigerant channel can be adapted to the volume and pressure change of the refrigerant due to heat exchange, the stable pressure and the flow velocity of the refrigerant in the heat exchanger can be ensured, and the efficiency of the heat exchanger can be guaranteed; meanwhile, pressure loss in the heat exchange process is reduced, and the working load of a compressor is reduced; in addition, the total way resistance of the refrigerant is simultaneously reduced, and the delivery power of the refrigerant is reduced.

The invention discloses a building viewing water curtain. The building viewing water curtain comprises a water storage tank and an electric control box, wherein the water storage tank and the electriccontrol box are mounted on the ground. A curtain wall is vertically mounted in the water storage tank, a wall eave is mounted at the upper end of the curtain wall, a water storage box is mounted at the upper end of the left side of the curtain wall, a water pump is mounted on the ground on the left side of the curtain wall, a water conveying pipe is mounted between the water pump and the water storage box, a water pumping pipe is mounted on the water pump, the water pumping pipe stretches into the water storage tank, and multiple short pipes and multiple long pipes are mounted at the upper ends of the left side and the right side of the curtain wall in an attached manner correspondingly. Siphoning is formed in the water storage box through the long pipes, the short pipes and round grooves, siphoning water currents drive impellers and rotary shafts to rotate for power generation, siphoning power generation is used for projection equipment, an electromagnetic valve and a water level sensor, the power consumption of water curtain viewing is reduced, due to the siphoning phenomenon, the water pump only needs to pump the water currents into the water storage box, the power consumptionof the water pump is reduced, and the power consumption of water curtain viewing is further reduced.

The invention discloses a refrigerating device. The refrigerating deice comprises a refrigerating compressor, a condenser, a gas separator, a refrigerant circulating pump and at least one phase change evaporative refrigeration tail end, wherein the refrigerant exhaust port of the refrigerating compressor is connected with the condenser and the first inlet port of the gas separator in sequence through refrigerant pipelines; the first exhaust port of the gas separator is connected with a refrigerant air suction port of the refrigerating compressor through a refrigerant pipeline; the second exhaust port of the gas separator is connected with the suction port of the refrigerant circulating pump through a refrigerant pipeline; the exhaust port of the refrigerant circulating pump is connected with the inlet port of the phase change evaporative refrigeration tail end through a refrigerant pipeline; the exhaust port of the phase change evaporative refrigeration tail end is connected with the second inlet port of the gas separator through a refrigerant pipeline. The refrigerating device can reduce power consumption, and the operating cost is reduced.

The invention discloses intermittent transportation packaging equipment for goods conveying. The intermittent transportation packaging equipment comprises a rack and annular products to be packaged and conveyed, wherein a limiting mechanism for limiting further movement of each annular product in the conveying direction is arranged at the bottom of the rack, an intermittent pushing mechanism is arranged at the end, close to a conveying inlet, of the rack, the intermittent pushing mechanism pushes each annular product located on the limiting mechanism to roll in the conveying direction, a driven roller shaft and a driving roller shaft capable of ascending and descending are mounted at the two ends of a mounting groove respectively, and an annular packaging mechanism which rotates around thebottom of each annular product and performs film coating is further mounted in the mounting groove. According to the equipment, the film coating procedure of the products can be completed by only oneperson, during film coating, driving wheels drive an annular ring to rotate through friction force, meanwhile, each annular product is driven by the driving roller shaft to rotate, and therefore, a film is evenly wound around each annular product; and the outer end of a film roll is pasted to each annular product in a manual mode, after film coating is finished, the film is cut off, and therefore, the operation is simple.