INSTRUMENTATION IN POWER PLANT

TURBINE   Steam Turbine A steam turbine is a prime mover, which continuously converts the energy of high pressure, high temp steam supplied by a steam generator into shaft work with the low temp steam exhausted to a condenser. The energy conversion takes place in two steps:– The high pressure & temp steam first expands in nozzle & comes out at high velocity. The high velocity jets of the steam coming out of the nozzle, impinges on blades mounted on a wheel, get deflected by an angle & suffer a loss of momentum which is absorbed by rotating wheel in producing torque.  1.    Speed                                                        i.  ...

CLASSIFICATION OF POWER PLANT CYCLE Power plants cycle generally divided in to the following groups, (1) Vapour Power Cycle (Carnot cycle, Rankine cycle, Regenerative cycle, Reheat cycle, Binary vapour cycle) (2) Gas Power Cycles (Otto cycle, Diesel cycle, Dual combustion cycle, Gas turbine cycle.) CARNOT CYCLE This cycle is of great value to heat power theory although it has not been possible to construct a practical plant on this cycle. It has high thermodynamics efficiency. It is a standard of comparison for all other cycles. The thermal efficiency (η) of Carnot cycle is as follows: η= (T1– T 2)/T 1 where, T1 = Temperature of heat source T2 = Temperature of receiver RANKINE CYCLE Steam engine and steam turbines in which steam is used as working medium follow Rankine cycle. This cycle can be carried out in four pieces of equipment joint by pipes for conveying working medium as shown in Fig. 1.1. The cycle is represented on Pressure Volume P-V and S-T diagra...