Applied Technology Types

Industrial steam turbine applications are generally classified as either condensing or non-condensing (back-pressure). A third classification is an extraction turbine, which can include elements of both.

Condensing turbines operate with an exhaust pressure less than atmospheric (this is a vacuum pressure). Because of the very low exhaust pressure, the pressure drop through the turbine is greater and more energy is extracted from each lbm (kg) of steam. Standard condensing turbines may be of straight flow (Figure 11-5a) or dual-flow opposed exhaust design (Figure 11-5b); the later being used to minimize stresses and optimize efficiency in larger units.

Figure 11-5a Straight Flow Condensing Turbine.

Figures 11-5a — 11-5i; adapted from graphics provided by Tuthill Corp., Murray Turbomachinery Div.

Figure 11-5a Straight Flow Condensing Turbine.

Figures 11-5a — 11-5i; adapted from graphics provided by Tuthill Corp., Murray Turbomachinery Div.

Figure ll-5b Dual-Flow Opposed Exhaust Condensing Turbine.
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