Adiabatic gas compression has always been a difficult task in refrigeration plants, and gas power plants as virtually a large percentage of expansion work goes into compression. The discovery of a new energy concept known as the Centrifugal Potential Energy has now made it practically possible to compress any fluid (i.e. liquid, gas or wet vapor) in a steady flow open system, with or without a heat exchange with the surroundings. With an appreciable amount of heat exchange with the surroundings, this compression flow process can be made isothermal or polytropic depending on the degree of heat exchange with the surroundings. Hence this will reduce the compression work tremendously, when compared with an isentropic compression. Thus polytropic and isothermal compressions can now be achieved in a steady flow open system, where the speed of flow is very high; therefore, comparatively small compression machines can now handle large mass flows and large work transfers, which have always been very difficult to accomplish using previous practices. This work should specifically be useful to automotive, aircraft and power industries; and professionals / students in engineering and sciences.