China National Electric Wire & Cable Import Export Co.

Technical Design of Main Equipment of Geothermal Power Plant

TECHNICAL DESIGN PARAMETERS
OF MAIN EQUIPMENT

I. STEAM TURBINE

- Admission pressure (Mpa abs) 0.6
- Admission temperature (0C) 160
- Exhaust pressure (Mpa) 0.0112
- Rotation speed (turbine and generator) (rpm) 3000
- Output at generator terminals (kW) 5773
- Capability (%) 100

II. DEMISTER

- Steam flow (t/h) 48.1
- Operating pressure (Mpa abs) 0.75 ? 0.8
- Operating temperature (0C) 165
- Design pressure (barg) 0.8
- Design temperature (0C) 200
- Pressure drop (bar) maximum Mpa 0.08
- Separation efficiency (%) 99.5
- Water content in outlet steam (in weight) (%) < 0.5%
- Water content supposed in inlet steam (in weight) (%) 1.5%
- Corrosion over thickness (mm) 3
- Construction standard ASME VIII
- Internals Stainless steel 316
- Shell ASTM A 515 Gr 60 or equivalent

II. MAIN STEAM STEEL PIPING
between Pertamina?s point of interface and turbine admission

- Operating/design pressure (Mpa) 0.65/1.0
- Operating/design temperature (0C) 200
- Steam flow (t/h) 150

III. STEAM VALVES
for all main steam isolation valves of large size

- Design temperature (0C) 200
- Design pressure (Mpa) 1.0
- Construction Flexible wedge gates Flanged ends By-pass line to permit line warming

IV. CONDENSER

Pressure at turbine exhaust (bar abs) 0.0112
Exhaust steam enthalpy (kJ/kg) 141
Gas content in steam (weight) (%) <3%
Temperature difference between gas and cold water (0 C) 17°C
Temperature difference water outlet and steam (0 C) 0
Cooling water inlet temperature (0 C) 30
Cooling water outlet temperature 47
Temperature difference between inlet steam and outlet steam (0 C) 113°C
Temperature difference between exhaust gas and inlet cooling water (0 C) 17°C

V. NON CONDENSABLE GAS EXTRACTION

Suction conditions
Gases CO2 (kg/h) 71
Gases H2S (kg/h) 936
Air (kg/h) 29.1
Discharge (bar abs) 0.09

Auxiliaries
Motive steam
Pressure (bar abs) 6.5
Temperature (0 C) 165°C

Cooling water
Nominal
Temperature (inlet/outlet) (0 C) 30°C

MATERIALS

Ejectors Stainless alloy Uranus B6 or equivalent approved for parts contacting the process fluid
Condensers Stainless steel 316 L

VI. MAIN COOLING WATER SYSTEM

Main steam condenser: Pressure mpa absolute 0.0112

Cooling tower: Expected flow head: >

Main steam condenser: Pressure bar absolute

- Counter flow type m
- Cross flow type m

Note: This head is between the normal water level in the cooling water basin and the hot water distribution inlet.

Cooling water: Temperature 0C 30

Hot water: Temperature 0C 47

Ambient (mean) Pressure kpa absolute 81.5
Temperature 0C dry bulb 24.9
Temperature (design) 0C wet bulb 24.3
Humidity % 96

VII. PIPING

1. Hot Water Flow Pipework

Fluid pH limits : 8.5
Maximum continuous operating temperature (0 C) : 50
Minimum Fluid Temperature (0 C) : 10
Transient Fluid Temperature Peak (1 hour every 12 hours) (0 C) : 47
Design Pressure (Maximum pressure at cooling water pumps discharge Vacuum between condenser and pumps) (Mpa) : 1.6
Hydraulic Test Pressure Mpa : 0.318
Maximum Pipe Deflection (%) : 3%

2. Cold Water Return Pipework

Fluid pH limits : 8.5
Maximum continuous operating temperature (0 C) : 50°C
Minimum Fluid Temperature (0 C) : 4°C
Design Pressure (Mpa) : 0.318
Test Pressure :
Maximum Pipe Deflection (%) : 11.16 x 10-4 cm/m0 C

VIII. PUMP MOTORS

Electric motor main characteristics (for each pump):

- Voltage (kV) : 0.38
- Enclosure : IP 55
- Insulation class : F
- Temperature rise class : B
- Efficiency at full load : > 95%

IX. COMPRESSOR

- Type :
- Number of Cylinder :
- Number of stage :
- Inter stage and final coolers
- V belt drive

X. OVERHEAD TRAVELING CRANE

- Type :
- Span (m) : 13.5
- Nominal loads (T) : 20
- Traveling speedwith traveling limit switches : Fore-and-aft 20m/minRight-and-left 18m/min

- Lifting hoist

- Type :
- Nominal load (T) : 20
- Nominal lifting height (m) : 14m above 0.00 level ground
- 2 lifting speedswith mechanical load limiter : Creep speed and normal speed7.9m/min main lifting hoist 13m/min for 5T lifting hoist

- Common hoists bearer trolley

- Type : Bi-rail
- Traversing speedwith traversing limit switches : Contractor to determine

XI. GENERATOR

- Active power (MW) 6
- Apparent power (MVA) 7.5
- Power factor 0.8
- Voltage (kV) 6.3
- Rotation speed (R.P.M) 3000 R.P.M.
- Frequency (HZ) 50 HZ
- Number of phases 3
- Coupling of phases STAR
- Class of insulation F
- Standards IEC
- Temperatures Stator (by embedded detectors) (0 C) 130
- (Max values); Rotor (by resistance variation) (0 C) 140
- Cooling water temperature (0 C) 33
- Short circuit ratio (about) 0.52

XII. MAIN POWER TRANSFORMERS

1. Manufacturer?s name
2. Number 1
3. Rated voltage
(a) High Voltage side (no load) kV 20
(b) Low Voltage (no load) kV 6.3
4. Number of phase 3
5. Rated frequency Hz 50
6. Vector symbol Ynd11
7. Percent reactance drop at full load (750 C)
(a) At nominal ratio tap % 7.90
8. Percent resistance drop at full load (750 C)
(a) At nominal ratio tap % 0.10
9. Exciting current at nominal tap
(a) At rated voltage Amp 4.33
(b) At 105% of rated voltage Amp 4.77
(c) At 110% of rated voltage Amp 5.24
10. Cooling type ONAN

XIII. STATION SERVICE TRANSFORMERS

1. Manufacturer?s name
2. Number 2
3. Rated voltage
(a)  High Voltage side (no load) kV 6.3
(b)  Low Voltage (no load) kV 0.4
4. Number of phase 3
5. Rated frequency Hz 50
6. Vector symbol Yyn0 or Dyn11
7. Percent reactance drop at full load (750 C)
(a)  At nominal ratio tap % 5.04
8. Percent resistance drop at full load (750 C)
(a)  At nominal ratio tap % 0.96
9. Exciting current at nominal tap
(a)  At rated voltage Amp 0.51
(b)  At 105% of rated voltage Amp 0.56
(c)  At 110% of rated voltage Amp 0.62
10. Cooling type ONAN/ONAF




Total 0 Product