A Gas Turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled to a downstream turbine, and a combustion chamber or area, called a combustor, in between.
The classification of gas turbine services includes heavy duty services and aero-derivative services, and the proportion of heavy duty services is about 79% in 2016, and the proportion is in increasing trend from 2012 to 2017.