What Types Of Gas Turbine Cooling Systems Are Included

What Types of Gas Turbine Cooling Systems are Included

Air cooling systems:
Compressor extraction cooling: a portion of air is extracted from an intermediate stage of the compressor and used to cool high temperature components, such as turbine blades.
For example, in some small gas turbines, cooling air is supplied to the turbine blades by pressurised air extraction to reduce the operating temperature of the blades.

Direct Cooling by External Air: The use of cold air from the outside environment to directly cool certain components of the gas turbine.
Liquid cooling system:
Water cooling system: water is used as the cooling medium to take away the heat through circulating flow.
For example, in some large industrial gas turbines, water cooling system is used to cool high temperature areas such as combustion chamber.
Oil-cooled system: Lubricating oil is used to cool and lubricate the bearings and other parts of the gas turbine.

Evaporative cooling system:
Use the principle of absorbing heat when liquid evaporates to carry out cooling.
This type of cooling can provide efficient cooling under some specific working conditions.

Composite cooling system:
Combining multiple cooling methods, such as air-liquid composite cooling, to give full play to the advantages of different cooling media.

Different types of cooling systems have their own characteristics in terms of cooling efficiency, cost, complexity, etc. The specific selection depends on factors such as the application scenario of the gas turbine, power size and operational requirements.