Centrifugal compressors are known by its energy efficiency, robust, long-lifetime and low maintenance. Disadvantage however is, that the energy efficiency is only at design point. As soon the conditions vary, like fluctuations on flow, the energy efficiency drops. On top, the regulation or turn-down of a centrifugal air-compressor is...

For many decades, the believe was that Reciprocating compressors were not reliable. For that reason, since the 70ies, the screw compressors have been replacing the Reciprocating compressors by the Twin screw compressors as a reliable Air-compressor. Every application where the Twin screw compressor could be an alternative, the Reciprocating compressor...

Another witness of real performances on Compressed Air installations. This case was the use of a 250kW VSD Oil-free screw compressor. The measured consumption over 24 hrs in multiple days was between 170 and 230 Wh/Nm3. The predicted performance was 120Wh/Nm3. Knowing that the best performances are around 90-110Wh/NM3, depending...

The only reason why Oil-lubricated compressors exist, is the initial cost of an Oil-lubricated compressor is cheaper. Yes I use the word cheaper and not lower cost ! Many users, when they need to select a new compressor, they are shocked about the high purchase price and the difference between...

Running a marathon is for most people a physical challenge. Running 42 kilometers in one go is not for everybody. Your body needs to be adapted, wel trained in order to be able to run that far. Air-compressors are not only designed for a certain capacity, but also for a...

Good marketing is convincing you that something is better than others. This is common practice throughout industry ! So have we been told that drinking cow milk and eating white bread is healthy. While in the meantime, everybody starts to realise that the opposite is true. More and more it...

To compress air, two compression principles are defined, either volumetric compression either dynamic compression. The Volumetric compression reduces a volume to a smaller volume, and the ratio of the two volumes defines the compression ratio. This is the working principle of a reciprocating air-compressor. During compression, the compressor chamber is...

Does a Green Air compressor exist ? First question is of course, what is the definition of a Green Air Compressor ? It should be : - the most energy efficient, in full load and in part-load - the lowest waste produced - limited maintenance - stable in all...

The invention of frequency converters has created tons of opportunities to adapt the capacity of industrial machines to the demand. If a machines is at 50% of its demand, often the partial load consumption is almost as high to 80% of its full installed power. However, variable speed drives on air-compressors...

Ghent in Flanders, well known for its textile and weaving industry. In 14th century, during the 100 yrs war between France and England, all French occupied territories were banned to do trading with England. In Flanders, part of Belgium, Jacob Van Artevelde, also known as the Wise man and the Brewer,...