Power systems 3 Tharmal power plant

 

Tharmal power plant 

              Energy flow 

         Coal - Boiler furnished (heat energy)-Boiler(steam  energy )- steam turbine (macanical  energy) - altarnetare(electrical energy)

Overall efficiency of any system depend upon 

,*** No of stage 

     

 Efficiency of each stage

Over all efficiency of Tharmal power plant   is very low

Generally it's value is 35% to 40%

Working cycle  

                       Tharmal power plant work on rankine cycle 

Fuel 

         

           Coal

      

Trade name - steam coal 

Steam coal is a non cakaing bituminous coal 

Main fuel (coal) is used during runing  condition  at Tharmal power plant

At starting time of boiler furnace 

                                   Oil is used

Oil is two types

LDO(light diseal oil)

HFO( hevy fuel  oil)

Type of coal

1 antracite

2 Bituminous

3 lignite

4 peat

Clorofic value of % corbon 

Antracite  -  highest←88%

Bituminous 78% to 88%

Lignite.      60 %to 78%

Peat.       Below 60%

Formetion  of coal 

                              Ash

                                 ↓

                

Fast stage           peat

                                 ↓

Secend stage.       Lignite

                                  ↓

 Thard stage         Bituminous

                                     ↓

Forth stage.           Antracite