Hydrogen compressor

  1. Compressors
  2. Hydrogen technologies


A hydrogen compressor is a device that increases the pressure of hydrogen by reducing its volume. Compression of hydrogen gas naturally increases its temperature, due to Charles' Law.

Hydrogen compressors are closely related to hydrogen pumps and gas compressors: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of hydrogen gas, whereas the main result of a pump raising the pressure of a liquid is to allow the liquid hydrogen to be transported elsewhere.

Types of hydrogen compressors

Piston-Metal Diaphragm compressor

Piston-metal diaphragm compressors are stationary high-pressure compressors, 4-staged water-cooled, 11~15 kW 30~50Nm3/h 40MPa for dispensation of hydrogen.[1] Since compression generates heat, the compressed gas is to be cooled between stages making the compression less adiabatic and more isothermal. The default assumption on diaphragm hydrogen compressors is an adiabatic efficiency of 70%.[2] Used in hydrogen stations.

Ionic liquid piston compressor

A ionic liquid piston compressor, is a hydrogen compressor based on a ionic liquid piston instead of a metal piston as in a piston-metal diaphragm compressor.[3]

Guided rotor compressor

The guided rotor compressor (GRC) is a positive displacement rotary compressor based upon an envoluted trochoid geometry which utilizes a parallel trochoid curve to define its basic compression volume.[4][5] It has a typical 80 to 85% adiabatic efficiency.[6]

Linear compressor

The single piston linear compressor uses dynamic counterbalancing, where an auxiliary movable mass is flexibly attached to a movable piston assembly and to the stationary compressor casing using auxiliary mechanical springs with zero vibration export at minimum electrical power and current consumed by the motor.[7] It is used in cryogenics

Hydride compressor

In a hydride compressor, thermal and pressure properties of a hydride are used to absorb low pressure hydrogen gas at ambient temperatures and then release high pressure hydrogen gas at higher temperatures; the bed of hydride is heated with hot water or an electric coil.[8]

Electrochemical hydrogen compressor

A multi-stage electrochemical hydrogen compressor incorporates a series of membrane-electrode-assemblies (MEAs), similar to those used in proton exchange membrane fuel cells, this type of compressor has no moving parts and is compact. With electrochemical compression of hydrogen a pressure of 5000 psi is achieved. Pressure is believed to go beyond 10,000 psi to the structural limits of the design.[9] A patent is pending for an exergy efficiency of 70 to 80% for pressures up to 10,000 psi or 700 bars[10]

See also

References

  1. ↑ Piston-metal diaphragm compressor
  2. ↑ Efficiency and performance measurement of a pdc single stage diaphragm hydrogen compressor-Pag.32
  3. ↑ New developments in pumps and compressors using Ionic Liquids
  4. ↑ GRC - Detailed description and defining geometry
  5. ↑ Hydrogen delivery liquefaction & compression
  6. ↑ Mechanical properties
  7. ↑ Valved linear compressor
  8. ↑ Hydride compressor
  9. ↑ Electrochemical hydrogen compressor
  10. ↑ Electrochemical hydrogen compressor

External links

es:Compresor de hidrógeno it:Compressore per idrogeno


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