3results about How to "Improve hydrogen utilization" patented technology

This utility model relates to a hydrogen peroxide quartz lamp burner, belonging to the field of quartz product manufacturing equipment. The burner consists of five parts: a lamp cover, a lamp holder, an oxygen pipe, a hydrogen pipe, and a feeding pipe. The main feeding pipe is divided into four branch feeding pipes, which are evenly distributed circumferentially through the lamp cover and extend into the central interlayer formed by the fusion of the lamp cover and the lamp holder, forming a feeding channel. Quartz powder can slide along the surface of the interlayer to the molten pool for easy melting. Three oxygen pipes and two hydrogen pipes are connected to the outside of the lamp cover, and the hydrogen and oxygen are separated by the lamp holder to prevent them from mixing and exploding inside the quartz lamp. The two hydrogen pipes are fused to the lamp cover and connect to the central interlayer; the three oxygen pipes penetrate the lamp cover and are fused to the lamp holder. A sieve plate is placed inside the lamp holder, and at its lower part, wick tubes of different levels, each with the same focal point, are obliquely welded in a ring array, guiding the flow of the mixed gas to ensure complete combustion, increasing the burner's operating temperature, and thus improving the quality of silicon dioxide melting.

This invention relates to a hydrogen circuit pressure stabilization and nitrogen removal device for a fuel cell system, comprising a gas-liquid separator, an inlet three-way valve, an outlet three-way valve, a nitrogen condenser, and a hydrogen circulation component. The mixed gas from the fuel cell stack's hydrogen outlet enters the gas-liquid separator to separate liquid water. The outlet of the gas-liquid separator is connected to the inlet of the inlet three-way valve; the first outlet of the inlet three-way valve is connected to the first inlet of the outlet three-way valve; the second outlet of the inlet three-way valve is connected to the inlet of the nitrogen condenser; the outlet of the nitrogen condenser is connected to the second inlet of the outlet three-way valve; the nitrogen condenser liquefies the nitrogen in the mixed gas entering it into liquid nitrogen; the outlet of the outlet three-way valve is connected to the hydrogen circulation component. This invention solves the problems of large fluctuations in hydrogen circuit pressure and low hydrogen utilization rate that are common in conventional hydrogen removal valve nitrogen removal methods, effectively extending fuel cell life and improving system hydrogen utilization rate.

The application discloses a hydrogen fuel control system for unmanned aerial vehicles, which comprises a hydrogen bottle, a pressure reducing valve, a hydrogen inlet valve, a first pressure sensor, a fuel cell stack, a steam-water separator, a double-variable peristaltic pump, a second pressure sensor, a controller, a drain valve, a temperature sensor and a current sensor. The system constitutes a closed hydrogen circulation loop to recover unreacted hydrogen. The controller monitors the hydrogen circulation pressure, the stack temperature and the load current in real time through a sensing network composed of double pressure sensors, a temperature sensor and a current sensor, analyzes the load change and the water-heat state based on the built-in program, and cooperatively regulates the rotating speed and the extrusion degree of the double-variable peristaltic pump, dynamically optimizes the flow and the flushing intensity of the hydrogen circulation. The system solves the water-heat management problem of the fuel cell of the unmanned aerial vehicle under dynamic working conditions, improves the hydrogen utilization rate, effectively prevents water flooding and membrane dryness, and guarantees the efficient, stable and long-life operation of the system.