39results about How to "Ensure power generation efficiency" patented technology

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 solar photovoltaic fixed bracket capable of preventing wind and sand, 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 with the upper end of the support plate, and the base is An installation mechanism is provided, the upper end of the installation mechanism is fixedly connected with an annular transparent sand-proof cover, the side wall of the installation mechanism is provided with a slot, the base is provided with a fixing mechanism extending into the slot, and the ring The inner rear side wall of the transparent sand protection cover is provided with a cleaning mechanism opposite to the solar photovoltaic panel. The structure design of the invention is reasonable, not only can protect the solar photovoltaic panel in the season of heavy wind and sand, alleviate the phenomenon of dust accumulation on the solar photovoltaic panel, but also can clean the sand and dust on the solar photovoltaic panel, and make the annular transparent sandproof The sand and dust in the cover can be discharged to ensure the service life and power generation efficiency of solar photovoltaic panels.

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 platform spiral type wave power generation device which comprises a water platform, a main machine room, a cylinder, an auxiliary machine room, a mooring rope, an underwater platform and third rolling wheel devices. The mooring rope and a floater pass through a first fixed pulley on the water platform and the underwater platform; the two third rolling wheel devices, two fourth rolling wheel devices and the common supporting cylinder are installed on the water platform; the left end of a rotating rod on the right side of the main machine room penetrates through the interior of the main machine room; a ratchet wheel is fixedly arranged on the rotating rod; a spiral cavity-shaped guide rail matched with a spiral piece is formed in the cylinder; the spiral piece and the spiral cavity-shaped guide rail are connected in a meshing mode; the right end of a rotating rod on the right side of the auxiliary machine room penetrates through the interior of the auxiliary machine room; and a ratchet wheel is fixedly arranged on the rotating rod. According to the platform spiral type wave power generation device, the power generation efficiency is guaranteed, the utilization rate of wave energy is high, and the overall stability during working can be guaranteed.

The invention discloses a photovoltaic panel safety detection and life evaluation system, which mainly comprises a photovoltaic panel, a temperature sensor, an ammeter, a voltmeter and a controller, wherein the number of the temperature sensor is at least one, the temperature sensor is arranged on the back surface of the photovoltaic panel, and is in contact and installed with a photoelectric conversion material; the ammeter and the voltmeter are installed on power supply output terminals of the photovoltaic panel separately; the temperature sensor, the ammeter and the voltmeter are connected with the controller separately; the controller continuously receives temperature signals of the temperature sensor, selects the highest temperature and compares the highest temperature with a fixed threshold value; and the controller continuously receives current and voltage signals of the ammeter and the voltmeter, and calculates output power of the photovoltaic panel. The photovoltaic panel safety detection and life evaluation system gives comprehensive consideration to operating temperature parameters, power generation power parameters and external environmental parameters of the photoelectric conversion material of the photovoltaic panel, so as to evaluate the operating life of the photovoltaic panel precisely and prompt the staff to replace it timely, facilitates the equipment maintenance of large-scale photovoltaic power plants, reduces maintenance cost, and ensures power generation efficiency.

The invention relates to a flag light energy lamp with functions of resisting strong wind, preventing sand dust, preventing mud rain, preventing bird dung, preventing snow and resisting hail. The flag light energy lamp comprises an installation frame, a connection column, photovoltaic panels, an illumination lamp and an electric storage device. The installation frame is vertically arranged. The multiple photovoltaic panels which are extended in the horizontal direction and are in a rectangular shape are fixedly assembled in the installation frame. Transparent partition plates are sealed to the installation frame and located on the two sides of the photovoltaic panels. The bottom end of the connection column can be provided with a connection sleeve in a fixed-axis rotation mode. A first convex block is fixedly arranged on the outer side wall of the connection column. A second convex block is fixedly arranged on the inner side wall of the connection sleeve. The left and right sides of the first convex block and the second convex block are provided with elastic reset parts correspondingly. The elastic reset parts are used for promoting the first convex block to be reset after being rotated in a fixed-axis mode in the left-right direction. According to the photovoltaic power generation device, strong wind can be resisted, production requirements are lowered, the production cost and the using cost are reduced, the functions of preventing dust, preventing snow and resisting hail are achieved, the power generation efficiency is ensured, and the service life is effectively prolonged.