Reciprocating piston compressors [ edit ]
by Admin
Posted on 13-05-2024 01:30 PM
Hydrogen is typically produced at relatively low pressures (20–30 bar) and must be compressed prior to transport. Most compressors used today for gaseous hydrogen compression are either positive displacement compressors or centrifugal compressors. Positive displacement compressors can be reciprocating or rotary. Reciprocating compressors use a motor with a linear drive to move a piston or a diaphragm back and forth. This motion compresses the hydrogen by reducing the volume it occupies. Reciprocating compressors, sometimes called recips for short, are the most commonly used compressor for applications that require a very high compression ratio. 1rotary compressors compress through the rotation of
gears, lobes, screws, vanes, or rollers.
There are six different type of hydrogen compressors that are widely used in the hydrogen economy. Reciprocating compressors: in a reciprocating hydrogen compressor, a piston or plunger compresses the hydrogen gas. As the piston or plunger moves back and forth, it increases the pressure of the hydrogen gas by reducing its volume. A reciprocating hydrogen compressor is typically used for low- to medium-pressure applications and are known for their high efficiency and durability. Centrifugal compressors: in a centrifugal hydrogen compressor, a spinning impeller compresses the hydrogen gas. As the impeller spins, it generates a high-velocity flow of hydrogen gas, which is then converted into pressure by a diffuser.
In a cylinder, the piston moves down, and the inlet valve opens and lets gas fill in the cylinder. When the piston moves back up, the volume reduces, increasing the pressure of the gas. Reciprocating compressors of fer one of the most mature technologies with the ability to generate high discharge pressure. The size and capacity can be tailor-made as per the requirements. The reference image is of a two-stage reciprocating compressor. Where the first stage’s output acts as an input for the second stage. One of the key challenges with these compressors is a lot of moving parts leading to breakdown and regular maintenance, heat management, possible contamination of hydrogen gas with oil, vibrations and noise, and metal embrittlement.
Ionic liquid piston compressor [ edit ]
Mechanical compressors are the most widely used compressors to compress low-pressure hydrogen into high-pressure tanks by using mechanical energy in which with the lowering of
confined volume, gaseous hydrogen can be squeezed into smaller chambers and result in higher gas pressures. In the following sections, general mechanical compressors including reciprocating piston compressors, hydrogen diaphragm compressors and ionic liquid compressors will be briefly introduced.
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