Gas
Equipment
Buyer's
Guide
In the compressor the gaseous CO2 at atmospheric pressure is compressed
and condensed. The CO2 compressor yields an isentropic efficiency of 80%
or higher in the operating frequency range of 50 to 80 Hz.The only advantages to CO2 over compressors is that there is no noise at all, and no need for electricity. The disadvantage is that you have to keep bringing it back to the supply shop for refills.
Properties of CO2
Carbon dioxide is a natural substance that plays an important role in many different processes in nature and in industry. It is odorless, non-flammable and non-toxic, but will increase the breathing rates of humans if concentrations rise above the natural level of atmospheric air. If large quantities escape into an air-filled room, the highest concentrations of CO2 will typically be found close to the floor.
When carbon dioxide is used as a refrigerant, it is often referred to by its refrigerant number, which is R 744.
CO2 Compressor design:
- Semi hermetic design
- Electrically driven by a Permanent Magnet Synchron Motor with
high efficiency and variable speed.
- Medium cooled
- 4 cylinders in cross arrangement.
- Low vibration due to fully balanced scotch yoke drive.
- Intermediate pressure is implemented inside the shell case to
minimize gas leakage between the compression rooms and the inner
space of the shell case.
- Piston/cylinder: clearance seal technique
Because of these design features the compressor achieves high efficiency and high reliability.
- Maximum pressures of 135 bar on the high pressure side.
- Very high suction pressures of around 40 bar, subject to wide
fluctuation.
- CO2 significantly affects the properties of the used lubricant.
- Developing special sealing elements for CO2.
- Oil free lubrication
- Efficient de-oiling filter
- Recovery plants for breweries and soft drink industry
- Helps prevent carbonation of the beer
- Largely used in urea plant
