The Prototype of Metal Hydride Hydrogen Compressor with Heat Pump
Abstract
The metal hydride materials are characterized by a high pressure gradient as a function of temperature, which has been used in the construction of a compressor that compresses hydrogen by a chemical-thermal cycle. The present paper describes a prototype of a metal hydride compressor working using a heat pump that provides thermal management between metal hydride containers. The principle of the compressor is to use a suitable metal alloy that can absorb and desorbed hydrogen into its intermetallic structure. By heating the alloy, there is a significant increase in pressure, which makes it possible to compress hydrogen without directly contacting the moving parts, thereby increasing process safety.
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Introduction
The equipment is the prototype of compressor which it uses for hydrogen compression the chemical-thermal cycles of absorption and desorption of hydrogen into the intermetallic structure of metal. The used conception of hydrogen compressor rests in use, suitable alloy of metal which allows the hydrogen absorption into its structure at low temperature and pressure. Significant pressure increase occurs after heating of alloy what it allows compression of hydrogen without its direct contact with moving parts what it increase the safety of the process. Hydrogen compressor consists of a pair of tandem-connected metal hydride (MH) tanks with heat exchanger. The tanks are heating and cooling alternately while at hydrogen absorption in one of the tank occurs for hydrogen desorption in the second tank. The transport of heat for heating and cooling is secure by heat pump thanks which it occurs to considerable saving of electric energy. Control programme is launched in operating system Raspbian on Raspberry Pi.
Conclusion
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