3.5 Other pumps

Other pumps

The group other pumps with their principles and types, is particularly heterogeneous i.e. it covers pumps having quite different operating principles. The word pump in this book applies to pumps for fluid transport or circulation, but pumps also appears in other contexts which are beyond the scope of this book. Hydraulic pumps for power transmission are mentioned, there are also pumps for gas transportation (gas pumps), air pumps and fans, compressors and vacuum pumps. There are pumps which are used for energy storing and for heat transfer, from lower to higher temperatures, so-called heat pumps.