Device and method for controlling water vapor in application of testing solid oxide fuel cell

Abstract

The invention relates to a device and a method for controlling water vapor in an application of testing a solid oxide fuel cell. The device comprises a water tank, a metering pump, a first one-way valve, an evaporator, a gas flow controller, a second one-way valve, a mixer, a heater and a heating tape, wherein the water tank, the metering pump, the first one-way valve, the evaporator and the mixer are connected in sequence; the gas flow controller, the second one-way valve and the mixer are connected in sequence; the mixer and the evaporator are placed in a heating cavity of the heater; a pipeline between the outlet of the water tank and the inlet of the metering pump is provided with a first temperature sensor and a first pressure sensor; the mixer is provided with a second temperature sensor and a second pressure sensor; and a fuel gas inlet pipe is provided with a third temperature sensor. Compared with the prior art, the method and the device have the advantages of leading the control and measurement for the water vapor to be more convenient and more accurate without a humidity measurement device and considering the influence of temperature and pressure to the volume of the water vapor, and are suitable for high pressure environment.

Description

technical field [0001] The invention relates to a control device and method for water vapor in a solid oxide fuel cell test application. Background technique [0002] Hydrogen energy is an ideal clean energy source, and fuel cells are the best way to efficiently convert hydrogen energy into electricity. However, the main source of hydrogen is still hydrocarbons (such as natural gas reforming), and the process of obtaining hydrogen inevitably generates CO2; at the same time, considering factors such as cost, technology and social acceptance, the era of hydrogen energy is still far away did not come. This has also become one of the important reasons for restricting the promotion and use of hydrogen fuel cells. Not all fuel cells necessarily use hydrogen as fuel. Solid oxide fuel cells (SOFC) work at high temperature (600-800 ° C), and can use cheap hydrocarbons (such as natural gas, etc.) as fuel. Although its reaction product contains carbon dioxide, SOFC has huge potenti...

AI Technical Summary

Problems solved by technology

The water vapor method in the above-mentioned patent is calculated by the ideal gas state equation. The calculation process has large errors and low accuracy. This calculation method can only be used under normal pressure, not under high pressure, and the device structure is relatively redundant. , heaters and heating tapes are used too much

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