Page 178 - Challenges in Corrosion Costs Causes Consequences and Control(2015)

156 CORROSION CAUSES

Stack
Combustion
gases
Steam
turbine
Generator

Steam
Pulverized
coal
Water
Air
Boiler Condenser Electricity
Figure 3.21 Schematic diagram of fossil fuel plant (7).

Fuel
Gas
Compressor turbine
Combustion Generator
chamber
Gas
turbine
cycle

Air
Electricity
Hot combustion gases
Steam
turbine
Generator
Steam
turbine Steam
cycle

Water
Exhaust gases
Boiler Condenser Electricity

Figure 3.22 Schematic diagram of combined-cycle plant (7).

3.15.2 Hydraulic Plants
Hydraulic power systems include both hydroelectric and pumped storage hydroelec-
tric plants. In both cases, water is directed from a dam through a series of tapering
pipes to rotate turbines and create electricity. In principle, the potential energy held
in the dam converts into kinetic energy when it flows through the pipes (Fig. 3.23).