Steam Turbines:
Principle and working of steam turbines, type of turbines, impulse and reactions,
compounding for pressure and velocity. Velocity triangles for various types.
Units: II
Stage efficiency, diagram efficiency, steam speed to blade, speed ratio for optimum
performance. Energy losses in steam turbine, turbine performance at various loads and
governing of steam turbines. Constructional details and description of steam turbine
components in brief.
Units: III
Regenerative feed heating cycles:
Introduction : Most Ideal Regenerative feed heating cycle. Regenerative feed heating cycles
and their representation on T-s and h-s Diagram. Representation of actual process on T-s and
h-s Diagram Regenerative cycles. Other types of feed heating arrangements. Optimum feed
water temperature and saving in Heat Rate. Feed Heaters, Direct Contact Heaters, Surface
Heaters
Reheating – Regenerative and Regenerative water – Extraction Cycles.
Reheating of steam, Practical reheating and Non- reheating cycles, advantage &
disadvantages of reheating, regenerative water extraction cycles, practical feed heating
arrangements.
Units: IV
Governing and performance of Steam Turbines.
Description of back pressure Turbines, pass-out Turbines and Mixed Pressure Turbines.
Units: V
Steam power plants selection of location, working medium. Fuels and fuel handling
equipments, ash handling equipments. Air pre-heater, feed water treatment. Methods of
combustion and various type of combustors. Types of boilers. Modern developments in steam
boilers. Description of cooling tower.