Thermal Efficiency

• Thermal efficiency can be improved by

  • (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)

T

s

1

2

3

4

(a) lower pressure(temp)

(b) Superheating

( c) increase pressure

Low quality,

high moisture content

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