1. Reheat cycle

2. Basic components of steam power plant

4. T 1 2 3 4 S

5. Thermal Efficiency Thermal efficiency can be improved by T T T
(a) Lowering the condensing pressure (lower condensing temperature, lower TL)
(b) Superheating the steam to higher temperature
( c) Increasing the boiler pressure (increase boiler temperature, increase TH)
( c) increase pressure s T 1 2 3 4 T 3
(b) Superheating 2 s T 1 2 4 1 s
Low quality,
high moisture content
(a) lower pressure(temp)

6. Reheating high-P turbine Low-P pump condenser 1 2 3 4 5 6 T s low-P
boiler