SINGLE CYLINDER TURBINES BASIC INFORMATION AND TUTORIALS

WHAT ARE SINGLE CYLINDER TURBINES?


The two types of steam turbines are condensing and back-pressure (noncondensing). Figure below illustrates these types and some of their sub classifications. Back-pressure turbines exhaust the steam at the pressure required by the process.


Single-cylinder turbine types. Typical types of single-cylinder turbines are illustrated. As shown, condensing turbines, as compared to back-pressure turbines, must increase more in size toward the exhaust end to handle the larger volume of low-pressure steam.


Automatic extraction turbines allow part of the steam to be withdrawn at an intermediate stage (or stages) while the remainder of the steam is exhausted to a condenser.

These turbines require special governors and valves to maintain constant pressure of the extraction steam while the turbine load and extraction demand are varying.

Uncontrolled extraction turbines are used to supply steam to feedwater heaters, since the pressure at the extraction points varies with the turbine load.

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