INTRODUCTION OF THERMAL POWER PLANT JAMSHORO

POWER GENERATION INDUSTRY OF PAKISTAN

Total installed Capacity : 22477 MW

Thermal Power Generation: 15454 MW (67.7 %)

Hydel Power Generation: 6556 MW (28.7 %)

Nuclear Power Generation: 787 MW (3.5 %)

(Source : HCIP, 2012, Pakistan energy yearbook, pp.81)

GENCOs: 4,720 MW (30.55 %)

KESC: 2,381 MW (15.4 %)

Private sector (IPPs) 8,353 MW (54.05 %)

(Source : HCIP, 2012, Pakistan energy yearbook, pp.81)

THERMAL POWER GENERATION INDUSTRY OF PAKISTAN

Ideal Rankine cycle

1-2 Isentropic compression on pump

2-3 Constant pressure, heat addition in a boiler

3-4 Isentropic explanation in a turbine

4-1 Constant pressure heat rejection in a condenser

Described in 1859 by the Scottish engineer William J.M. Rankine

Ideal reheat Rankine cycle

FACTORS AFFECTING THE RANKINE CYCLE PERFORMANCE

1. Lowering the condenser pressure (Lowers Tlow, avg)

FACTORS AFFECTING THE RANKINE CYCLE PERFORMANCE

2.Superheating the steam to high temperatures (Increases Thigh, avg)

FACTORS AFFECTING THE RANKINE CYCLE PERFORMANCE

3. Increasing the boiler pressure (Increases Thigh, avg)

Supercritical Rankine cycle

Commissioning 1988-91.

Installed capacity 880 MW

De-aerated capacity 710 MW

Unit # 1 250 MW , Oil Fired

Unit # 2, 3&4 210 MW each , Oil

& gas (dual) fired

INTRODUCTION OF THERMAL POWER PLANT JAMSHORO

Process flow diagram of unit # 2,3 &4

UNIT # 2,3&4 (CHINESE)

Type : Subcritical, reheat type (N210-132/538/838)

Fuel: Furnace oil & natural gas (CH4) Capacity: 210 MW Net plant efficiency: 32.30 % Main steam flow : 680 t/h Main steam pressure: 132 kg/cm2

Main steam temperature: 538 0C Reheat steam pressure: 24.5 kg/cm2

Reheat steam temperature: 538 0C Condenser pressure: 11.23 kPa

Plant description (designed condition)

6.6 kV auxiliaries  

1. Boiler feed water pumps 03 (02 in operation and 01 on

standby)

2. Condensate pumps 03 (02 in operation and 01 on

standby)

3. Circulating water pumps 03 (02 in operation and 01 on

standby)

4. Forced draft fans (02 in operation)

5. Induced draft fan (02 in operation)

6. Gas recalculating fans (02 in operation)

INTRODUCTION OF MAIN PLANT COMPONENTS

Type: Reheat condensing tandem compound Three cylinders HPT (12 stages,1 impulse & 11 reaction) IPT(10 stages, reaction) LPT(10 Stages reaction) 3000 rpm 08 no of extractions/bleeding

Steam turbine

Turbo-generator

Boiler

Type: Vertical, balanced draught furnace,

corner fired

Fuel: Oil, gas and both (dual)

Capacity: 680 t/h

Flue exhaust temperature: 140 0C

Air flow : 583250 Nm3/hr

Boiler fittings

Condenser

No of tubes : 18000

Two sides (A/B)

Vacuum: 682 mmHg

Tube material: Copper & S.S

CW flow: 26000 t/h

Surface condenser

Pumps

Condensate pump

Boiler feed pump

CW pump

LP heater drain pum

Stator cooling water pump

BCW pump

Feed water heaters

LP heater

HP heater

Dearetor

Cooling tower

Q & A

Thanks