What is exhaust steam turbine?

An exhaust steam turbine is a type of steam turbine that operates by using steam that has already done work in a previous stage, typically in a steam generator or boiler. This turbine extracts energy from steam after it has expanded in another turbine or system, utilizing the remaining thermal energy to generate additional power.

Key Features:
Energy Recovery: The primary function of an exhaust steam turbine is to recover energy from steam that is typically discharged at a lower pressure and temperature after passing through a high-pressure turbine.

Operation: The exhaust steam enters the turbine, where it drives the turbine blades, converting thermal energy into mechanical energy. This can then be used to generate electricity or provide mechanical work.

Types: Exhaust steam turbines can be categorized into two main types:

Condensing Turbines: These turbines condense the steam into water after it has passed through, maximizing energy extraction.
Back-pressure Turbines: These turbines discharge steam at a pressure that can be used for heating or other processes, instead of condensing it.
Applications:
Power Generation: Often used in power plants to increase overall efficiency by utilizing steam that would otherwise be wasted.
Cogeneration Systems: Commonly found in cogeneration plants, where steam is used for both electricity generation and heating.
Industrial Processes: Used in various industries for processes that require steam or mechanical power.
Overall, exhaust steam turbines play a crucial role in improving the efficiency of thermal systems and maximizing energy recovery.