Heat self-balancing metal hydride hydrogen pressurization device

Abstract

The invention provides a heat self-balancing metal hydride hydrogen supercharging device. The device comprises two or more metal hydride compression units, a heat exchange unit and a control unit. The outer walls of the metal hydride compression units are wrapped with the heat exchange unit. Automatic operation of the metal hydride hydrogen supercharging device is achieved through the control unit. The hydrogen supercharging device adopts the electric heating mode, supercharging is rapid, the efficiency is high, a system is free of noise, easy to operate and convenient to maintain, and the device has good market application prospects.

Description

technical field [0001] The invention relates to a hydrogen pressurization method, which utilizes the principle that metal hydrides have a lower hydrogen release platform pressure at a lower temperature and a higher hydrogen release platform pressure at a higher temperature to achieve the purpose of hydrogen pressurization. Background technique [0002] According to thermodynamic properties, the change of metal hydride dehydrogenation pressure with temperature follows the Van’t Hoff equation: lnP d =△H 0 / RT-△S 0 / R , where Pd is the hydrogen desorption equilibrium pressure, △H 0 and ΔS 0 are the enthalpy and entropy changes of the reaction. [0003] When the hydrogen storage alloy is saturated with hydrogen at a lower temperature and lower pressure, the temperature of the metal hydride is raised to a higher temperature, and the metal hydride will release high-pressure hydrogen at this time. Metal hydride hydrogen compressors not only use this characteristic of hydrogen ...

AI Technical Summary

Problems solved by technology

However, the operation of metal hydride hydrogen compressors currently on the market is relatively complicated. Because water baths and oil baths are used for heating, it has a great impact on the sealing and stability of the equipment itself, and this method has a large interval between high and low temperature heat exchange. , resulting in long compression intervals and low compression efficiency, making it difficult to achieve large-scale popularization and application

Relatively speaking, the electric heating method has fast temperature rise and stable temperature control. It can be designed into various shapes to adapt to the equipment to be heated, but the conversion from high temperature to low temperature is slow, so it is basically not used in metal hydride hydrogen compressors.

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