38results about How to "Ensure power generation efficiency" patented technology

The invention relates to the technical field of cleaning equipment and provides a solar cell panel cleaning system. The solar cell panel cleaning system comprises a transparent protective plate, a light intensity detection device, a controller, a cleaning device and a braking device. The automatic solar cell panel cleaning system can timely detect the dirt degree of the surface of the transparent protective plate on a solar cell panel and automatically clean the surface of the transparent protective plate and effectively ensures power generation efficiency of the solar cell panel; moreover, the whole cleaning process does not need human intervention, and thus maintenance risk and maintenance cost are greatly reduced.

An object of the present invention is to provide a fuel cell system capable of starting below freezing point without increasing the size of the diluter. The fuel cell system 1 comprises an OCV purge execution unit 42 replacing gas retained in a fuel cell 10 by supplying additional anode gas from a supply device 20 to the fuel cell 10 when starting up the fuel cell. In addition, the fuel cell system 1 comprises a low temperature startup determination unit 41 determining whether to perform low temperature startup or normal startup on the fuel cell 10. The OCV purge execution unit 42 decreases the pressure of additional anode gas supplied from the supply device 20 and increases the total replacing amount of gas retained in the fuel cell 10 in a case of performing low temperature startup, as compared with a case of performing normal startup.

The invention discloses a water quality monitoring device and a water quality real-time monitoring system. The water quality monitoring device comprises a floating device, a monitoring device and a power supply device, wherein the floating device comprises a floating platform, and an outer-layer filtering structure is arranged at the bottom of the floating platform; the monitoring device comprisesan equipment box, an inner-layer filtering structure is arranged at the bottom of the equipment box, and the inner-layer filtering structure penetrates through the through hole and is located in theouter-layer filtering structure; a collection box detachably connected to the bottom of the equipment box is arranged in the equipment box, a collection module, a wireless communication module and a plurality of water quality detection sensors are arranged in the collection box, and probes of the water quality detection sensors are fixed in the inner-layer filtering structure; the power supply device comprises a solar cell panel, a solar charging module, water power turbine fan blades, a water power turbine charging module and a storage battery. On the basis of realizing remote real-time waterquality monitoring, the power supply stability of the system is improved, the structure is improved to facilitate disassembly and assembly, and thus the maintenance difficulty is reduced.

A fuel cell system includes a fuel cell having a stack composed of stacked cells that generate electrical power from anode gas and cathode gas; a cell voltage measuring device connected to the cells to measure the voltages of the cells, the cell voltage measuring device outputting a first predetermined value as a measurement value when the voltage of the cell being measured is at or below a detection limit; a stack voltage measuring device connected to the stack that measures the voltage of the stack; and a control unit that restricts the current flowing though the fuel cell when the difference between the sum of the individual voltages of the cells measured by the cell voltage measuring device and the voltage of the stack measured by the stack voltage measuring device exceeds a second predetermined value.

The invention discloses a wind-sand-proof solar photovoltaic fixing support, which comprises a base and a solar photovoltaic panel, the upper end of the base is fixedly connected with a support plate, the solar photovoltaic panel is fixedly connected to the upper end of the support plate, the base is provided with a mounting mechanism, the upper end of the mounting mechanism is fixedly connected with an annular transparent sand-proof cover, a clamping groove is formed in the side wall of the mounting mechanism, a fixing mechanism extending into the clamping groove is arranged on the base, and a cleaning mechanism opposite to the solar photovoltaic panel is arranged on the inner rear side wall of the annular transparent sand-proof cover. The support is reasonable in structural design, not only can protect the solar photovoltaic panel and relieve the phenomenon that sand and dust are accumulated on the solar photovoltaic panel in seasons with large wind and sand, but also can clean the sand and dust on the solar photovoltaic panel and discharge the sand and dust in the annular transparent sand-proof cover, and the service life and the power generation efficiency of the solar photovoltaic panel are guaranteed.

The invention discloses a small-scale sealing type permanent magnet generator for wind power generation, comprising a casing, a rotor iron core, a stator iron core, a stator winding and a motor shaft. The casing comprises a front casing and a rear casing, and also a heat radiation apparatus and a heat radiation channel. The heat radiation apparatus comprises a radiator and an air guiding sleeve. The heat radiation channel comprises a rotor cooling air channel, a permanent magnet cooling air channel, a stator cooling air channel and a rear casing heat radiation wind channel. Two end faces of the rotor iron core are respectively provided with a non-magnetic material separator plate. The invention is advantageous in that the internal structure of the permanent magnet generator can be fully utilized, heat exchange and heat radiation of heat energy in the permanent magnet generator can be effectively achieved, and thereby the magnetic comprehensive properties, the generating efficiency and quality of the permanent magnet generator can be ensured.

The invention relates to the technical field of testing devices, in particular to a full-size photovoltaic module IAM testing device and a testing method thereof.The full-size photovoltaic module IAM testing device is provided with a transverse rod, rotating shafts are symmetrically and vertically arranged at the positions, opposite to the ground, of the lower end of the transverse rod, and a bearing penetrates through the joint of one end of each rotating shaft and the transverse rod; the other end of the rotating shaft is fixed on a support, and a photovoltaic assembly is fixed on the support. According to the full-size photovoltaic module IAM test device and the test method thereof, the power generation performance of the full-size photovoltaic module at different angles can be measured, so that a laboratory test result is closer to the actual power generation efficiency of a photovoltaic power station; the power generation efficiency of the photovoltaic module is guaranteed, and the income of the whole photovoltaic power station is improved.

The invention discloses an efficient and intelligent solar power generation apparatus. The apparatus comprises a solar cell panel, a storage battery, a rotating unit and a control unit, wherein the solar cell panel is used for receiving sun shine for performing power generation; the storage battery is connected with the solar cell panel; the rotating unit is used for rotating the solar cell panel; and the control unit is used for presetting conditions for controlling rotating directions and angles of the rotating unit. According to the efficient and intelligent solar power generation apparatus, reasonable design for the apparatus is realized, so that the solar cell panel can fully utilize sun shine, and relatively high power generation efficiency is achieved.

The invention provides a biaxial computer-numerical-control positioning method of solar panels. The method includes the steps: a GPS (global positioning system) provides latitude and longitude of a local and time service data, sunrise time and sunset time of a current day are calculated, a maximum of solar attitude of the current day and running total of azimuth are calculated, the time with the maximum solar attitude is determined as noon time of the current day, changes in the solar attitude and the azimuth per unit of time from the sunrise to the noon time are calculated, single feed of an attitude drive unit and that of an azimuth drive unit are controlled according to the changes, and the solar panels and the sun are synchronously positioned constantly. By the use of the method, high solar panel positioning precision and high power generation efficiency are achieved. The invention further provides a biaxial computer-numerical-control positioning system of solar panels. The system comprises a controller and a positioning actuator. The controller comprises a satellite data receiving unit, a data processing unit and a control signal transceiving unit. The positioning actuator comprises the attitude drive unit and the azimuth drive unit. A group of controllers is applicable to controlling multiple groups of positioning actuators, and configuration cost is low.

The invention discloses a multi-new energy utilization complex for farmland irrigation areas, which comprises a machine room, a wind power mechanism arranged at the top of the machine room, a tower arranged in the machine room, a generator arranged in the tower, a generator rotating shaft fixedly connected in the generator, two ends of the generator rotating shaft extending out of the generator, and the generator rotating shaft fixedly connected with the wind power mechanism. A hydroelectric generation mechanism is arranged at the bottom of the tower and fixedly connected with a rotating shaft of the generator, an electricity storage mechanism is fixedly connected to the top of the tower and electrically connected with the generator, a water storage mechanism is arranged on one side of the machine room and extends into the machine room, and a photovoltaic mechanism is arranged at the top of the water storage mechanism and electrically connected with the electricity storage mechanism. According to the invention, the condition that no overhigh building shields sunlight and wind power in a large-area farmland area is fully utilized, wind-solar complementary power generation is realized, and power generation can be realized under any weather condition.

The invention relates to a multi-energy complementary microgrid system which comprises an electric bus, a cooling bus, power generation equipment, refrigeration equipment and energy storage equipment.And the electric bus is connected with an external power grid. The power generation equipment is connected with the electric bus. And the refrigeration equipment is connected with the electric bus and the cooling bus respectively. The power generation equipment supplies electric energy to the refrigeration equipment. And the energy storage equipment is respectively connected with the electric busand the cooling bus. The power generation equipment supplies power to the energy storage equipment. The system has the advantages of being high in energy gradient utilization efficiency, reliable inelectric energy supply, good in economic benefit, environmentally friendly and the like. Power generation equipment, refrigeration equipment, energy storage equipment and the like are combined, and anexternal power grid is accessed in a micro-grid form, internal load fluctuation can be effectively adjusted, the electrical load in the peak period of a power grid is reduced, and the increasingly increased contradiction between peak and valley loads of a power system is relieved. The problem that the annual effective utilization time of power equipment is continuously shortened is solved, the electrical safety and the stability of the power grid are improved, and the power generation efficiency and economic benefits are powerfully guaranteed.

The invention provides a method and device for identifying a pitch angle consistency deviation based on blade load. The method comprises the following steps: separately measuring strain values of three blades of a wind turbine generator based on a strain sensor; calculating blade root shimmy bending moment and blade root waving bending moment of each blade according to the strain value of each blade; calculating resultant bending moment of the blade based on the blade root shimmy bending moment and the blade root waving bending moment of each blade; carrying out filtering processing on the resultant bending moment of each blade to obtain a direct current component approximate value of the resultant bending moment of each blade; and calculating the maximum difference value between the direct-current component approximate values of the resultant bending moment of the three blades, and if the maximum difference value is continuously greater than a set threshold value within preset time, judging that the pitch angle consistency deviation exists among the three blades. By applying sensing equipment and monitoring the blade root load, the consistency difference of the pitch angles between the blades of the wind turbine generator is effectively and automatically identified, the situation that the generator runs in an off-design condition for a long time is avoided, and the load safety and the power generation efficiency of the generator are guaranteed.

A thermoelectric power generator includes: a pipe in which a first fluid flows; a power generation module including a thermoelectric conversion element; and a holding member that is in contact with a one side part of the power generation module, such that heat of a second fluid that is higher in temperature than the first fluid transfers to the one side part of the power generation module. The holding member holds the power generation module and the pipe in a heat transferable state, such that the pipe is in contact with the other side part of the power generation module. The thermoelectric power generator includes a heat conductive component interposed between the holding member and the pipe to define a heat transfer course through which heat transfers from the second fluid to the first fluid, at downstream of the power generation module in a flowing direction of the second fluid.

The invention discloses an electric energy management system for a wind-driven generator set and relates to the technical field of power management. The electric energy management system comprises a central processing unit which is bidirectionally electrically connected with a display screen and a storage module. The electric energy management system has the advantages that by the joint effect ofa first wind-driven generator, a second wind-driven generator, a third wind-driven generator, a first electric quantity sensor, a second electric quantity sensor, a third electric quantity sensor, a first signal emission module, a first signal receiving module, the central processing unit, a comparison module, a feedback module, a control node and an alarm module, automatic alarming of wind-drivengenerator set faults is achieved, electric energy management staff can timely discover the faults and accurately learn about the working state of each unit in the wind-driven generator set, and the power generation efficiency of the wind-driven generator set is guaranteed.

The invention discloses a solar external sunshade device, comprising a metal barrel, vertically-arranged metal groove strips are welded at the two ends of the side wall of the metal barrel, the two metal groove strips are tangent to the cylindrical surface of the metal barrel, one ends of the two metal groove strips are welded with the same transverse strip, an electric roller is fixed to the inner wall of the metal barrel through bolts, a sunshade curtain is wound around the side wall of the electric roller, a rectangular hole is formed in the side wall of the metal barrel, sliding blocks arearranged on the inner walls of the two metal groove strips in a sliding mode, the same metal strip is fixed to the side walls of the two sliding blocks through bolts, and one end of the sunshade curtain penetrates through the rectangular hole and is clamped to one side of the side wall of the metal strip. According to the solar external sunshade device, the metal strips can conveniently move in the directions of the metal groove strips, the sunshade curtain can be conveniently rolled and unfolded, dust on the surface of the sunshade curtain can be conveniently scraped off through a brush strip, the cleaning and maintaining difficulty is reduced, and the power generation efficiency of an arc-shaped solar power generation panel is guaranteed.

The invention discloses a solar cell panel framework, comprising a framework body, and characterized in that the framework body is provided with a wiper used for cleaning the surface of a solar cell panel; the wiper is provided with a manual handle and a driving mechanism; the driving mechanism can automatically drive the wiper to work. The solar cell panel framework has a novel structure design, is convenient to clean the surface of the solar cell panel, and is in favor of guaranteeing the generating efficiency of the solar cell panel.