External heating type solid hydrogen storage system and hydrogen charging and discharging method thereof

Abstract

The invention discloses an external heating type solid hydrogen storage system and a hydrogen charging and discharging method thereof. The system comprises a hydrogen storage tank, a gas inlet pipe, a gas outlet pipe and a circulating pipe, at least one temperature sensor sleeve is arranged in the hydrogen storage tank in the axial direction, and a plurality of first temperature sensors are installed in the temperature sensor sleeve; and the gas inlet pipe and the gas outlet pipe are respectively communicated with the hydrogen storage tank, the gas inlet pipe is provided with a first valve, a one-way valve, a heating device, a second temperature sensor and a second valve, the gas outlet pipe is provided with a third valve, a cooling device, a back pressure valve and a fourth valve, one end of the circulating pipe is communicated with the heating device, the other end of the circulating pipe is communicated with the gas outlet pipe, and a fifth valve and a circulating pump are arranged on the circulating pipe. An external heating mode is adopted to firstly heat hydrogen, then the magnesium-based hydrogen storage alloy is heated through high-temperature hydrogen, the structure of the hydrogen storage tank is simplified, and complex structures such as heat exchange tubes or electric heating rods do not need to be additionally arranged in the hydrogen storage tank, so the number of welding seams is reduced, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of hydrogen energy, in particular to an externally heated solid-state hydrogen storage system and a hydrogen charging and discharging method thereof. Background technique [0002] Magnesium alloy hydrogen storage material is a hydrogen storage medium with high hydrogen storage capacity and good safety performance. Since the hydrogen charging or dehydrogenation reaction of magnesium alloy hydrogen storage materials needs to reach a certain temperature to proceed quickly, and the hydrogen charging and discharging reactions are accompanied by obvious thermal effects, so the solid-state hydrogen storage equipment based on magnesium-based hydrogen storage technology needs to have a heating function . Conventional heating methods include electric heating rod heating and heat conduction oil heating, etc. However, due to the low thermal conductivity of the hydrogenation product of the hydrogen storage material, the...

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Problems solved by technology

Conventional heating methods include electric heating rod heating and heat conduction oil heating, etc. However, due to the low thermal conductivity of the hydrogenation product of the hydrogen storage material, these heating methods based on heat conduction take a long time, the equipment starts slowly, and usually requires several times of heating. Hours to reach hydrogen charging or hydrogen discharging temperature

In addition, the temperature difference between different positions in the hydrogen storage container is very large, the temperature of the magnesium alloy material near the heat exchange tube or heating rod is high, and the temperature far away from the heat exchange tube or heating rod is very low, and the uneven heating is serious, which is not conducive to The progress of the hydrogen charging and discharging reaction

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