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GTG_1302SC_MHI501FD_PIs.doc
Cancelled Order
2 x New 160 MW Nominal @ High Ambient 84.7F MHI 501Fd Gas Turbine Generators
On
1 x Mitsubishi Plant 195Mw ST-G 60 Hz CCGT Power Island
Asking Price: 501F $38.85MM Each
MHI 198MW STG $34.65MM
$10MM Each MHI will update to latest technology
160 Mw Each At High Ambient, About 182- 186 Mw @ Iso
These units are new and for sale as a pair, They were purchased for well Over $80 million for both.
Nominal Base Case Natural Gas 163.27 MW Gross at 84.7 °F (29.3°C) CIT, and 14.678 psia (1.012 bar a)
Generator Voltage: 16,500 V, 3,600 rpm, 60 Hz. Power Factor 85%.
Industrial for Simple Cycle Power Application
Dual fuel: Natural Gas is a primary project fuel. Distillate is a secondary fuel
Natural Gas Lower Heating Value: 11,600 kcal/kg (20,880 Btu/lb)
Distillate Oil Lower Heating Value: 10,100 kcal/kg (18,180 Btu/lb)
Fuel Temperature Range:
Distillate: 80°F (27°C)
Natural Gas: +74.3°F to 392°F (23.5°C to 200°C)
{MHI expects natural gas at a temperature no lower than 23.5 °C (74.3 °F)}
Type of enclosure: Thermal & sound for outdoor installation. Presence of high salt concentration in the atmosphere must be incorporated into design.
Dry Low NOx Combustion System
Starting Device: 1,850 kW Electric Motor
NOX Control Diluent
Distillate: Water
Natural Gas: Dry
Quality of Injection Water NO x Control-- Demin water (supplied by P)
Contaminant Quantity
Total Dissolved Solids 0.025 mg/l
SiO2 (as such) 0.01 mg/l
Lube Oil System:
Power Source: Shaft Driven Main Pump 100% Capacity
· Coolers: Plate & Frame
· Filters Duplex
· Coolant: Closed cycle cooling water loop Cool Side - Max. 122°F (50°C)
Closed Cycle Cooling Water Quality - Conditioned water (supplied by P)
Contaminant Quantity
Total Dissolved Solids 0.025 mg/l
SiO2 (as such) 0.01 mg/l
Fire Protection: High pressure CO2 bottle type
Inlet System Scope:
· Ductwork
· Inlet filters
· Evaporative cooler and mist eliminator
· Silencers as needed to comply with the Purchase Contract
Exhaust System Scope:
· Exhaust Expansion Joints
· Bypass Stack (Option)
· Exhaust System Transition
· Exhaust Orientation: Axial
Cleaning System:
Q Water System: semiautomatic on-line/off-line (manual local control)
Ratings and Performance
Rating [NG] [Distillate]
Ambient Temp,°F(°C) 74.3 (23.5) 74.3 (23.5)
Ambient Relative Humidity (%) 78 78
Ambient Press, psia (bar a) 14.678 (1.012) 14.678 (1.012)
CIT, °F (°C) 74.3 (23.5) 74.3 (23.5)
Generator Gross Output, kW 169,420 147,850
Gross Heat Rate,
Btu/kWh (kJ/kW) (LHV) 9,438 (9,958) 10,243 (10,807)
Total Aux, Loads (kW) 900 1,250
Exhaust Pressure Losses,
in. (mm) H2O 5.9 (150)
The equipment package is as follows:
Combustion Turbine Enclosure
Combustion Turbine Longitudinal
Electrical and Control Packages
Evaporative Cooling Media and System
Exhaust Ductwork
Fin Tube Cooler (Air Radiator)
Gas and Oil control Valves
Generator and Exciter
Generator Rotor Removal Dolly
Inlet and Inlet Filters and Silencers
Lube Oil Cooler and Supports
Prefabricated Piping (Local)
Starting Package
Turbine Cooling Air Coolers
Turbine Performance Information
Simple Cycle Heat Rate (LHV): 9,491 btu/kwh at Average Conditions
Simple Cycle Output: 162,370 kw at Normal High Conditions
Average Dry Bulb Temp: 23.5 Deg. C
Average Relative Humidity: 78.0%
Normal High Dry Bulb Temp: 29.3 Deg. C
Normal Relative Humidity: 58%
Extreme High Dry Bulb Temp: 44 Deg. C
Normal Low Bulb Temp: 20 Deg. C
Extreme Low Bulb Temp: 9.0 Deg. C
Mean Annual Rainfall: 1,083 mm
Natural Gas Pressure @ Inlet: 36 (±1%) barg minimum
Spare available at additional costs
1 x Mitsubishi Plant 195 Mw ST-G 60 Hz Data
Please be advised that the following information is given as an indication only and cannot have any contractual value.
Site conditions associated with the performance guarantees of the plant
- ambiant temperature : 23.4°C
- relative humidity : 77%
- atmos pressure : 1010.9 mbar
- fuel : gas, LHV 20,854 Btu/lb
- cos phi : 0.9
- evaporative cooler : installed, but not operated
- EOH : < 250h
Steam Turbine Generator - Summary details for the initial projected plant
- Type : Tandem Compound Double Exhaust Condensing reheat Turbine
- Rated Output : 195.5 MW
- Rated speed : 3,600 rpm
- HP Steam Pressure : 126 bar a.
- HP Steam Temperature : 566°C
- LP Steam Pressure : 4.8 bar a.
- LP Steam Temperature : 294.2°C
- Exhaust Pressure : 0.065 bar a.
- Downward Exhaust
The ability of the STG to operate with dry cooling has not been studied.
Heat Recovery Steam Generator
Specifications for the initial projected plant (yearly average design values)
· The contracts for the Two HRSGs and condenser have been negotiated, but have not been enforced
Input data
- Exhaust gas temperature : 621°C
- Exhaust gas flow : 1596 t/h
- Steam from HP Steam Turbine outlet (to be reheated) :
Pressure : 29.3 bara
Temperature : 355.6°C
Flowrate : 193.9 t/h
Required values
- HP Outlet
Pressure 130.2 bara
Temperature 567.4°C
Flowrate >= 200.6 t/h
- IP Outlet (after reheat)
Pressure 27.9 bara
Temperature 566.2°C
Flowrate >=221.3 t/h
- LP Outlet
Pressure 5.0 bara
Temperature 295.1°C
Flowrate >= 27.3 t/h
Price level for both HRSGs : $20 MUSD (at year 2001 conditions)
Tenderers : Alstom, Nooster Eriksen, Deltak, CMI, NEM, Mitsubishi Boilers, Mitsui Babcock
Extract from the Steam Turbine Functional Specification
1. PURPOSE
· The aim of this note is to give the main operating data for the Steam Turbine and the associated auxiliaries for the initial intended site.
· The plant capacity is about 515 MWe with 2 combustion turbines operating with natural gas, 2 boilers, and one steam turbine. Electrical network frequency is 60Hz.
· The Steam Turbine generator shall be designed for operation in a 2+2+1 reheat combined cycle arrangement. Each Combustion Turbine will exhaust to a separate Heat Recovery Steam Generator (HRSG).
· Each HRSG will have three pressure levels. The Steam Turbine will have steam admitted at each of the three pressure levels (HP, IP, LP) and exhaust the steam to the condenser. The HP Steam Turbine outlet is reheated in the HRSG and reinjected to the IP Steam Turbine.
· The condenser is cooled via a mechanical draft cooling tower with makeup water from the river. A Steam Turbine by-pass to the condenser is provided.
· As an option, a supplementary firing of ~22,5 MWth per HRSG (~18,5 MWe) is considered in order to increase the power output of the ST in summer.
2. CHARACTERISTICS AND MINIMUM PERFORMANCES REQUIREMENTS
The Steam Turbine generator set shall be sized according to the following design conditions in order to guarantee the good operating without any time limitation for all cases. The specified performances (net electrical output) are the minimum performances requirements. Input data are given at the ST limit of supply.
2.1 Yearly average Design conditions, net electrical output ≥ 194,0 MWe (guaranteed case)
Input Data / HP inlet / HP outlet / IP inlet / LP inlet / CondenserPressure (bar abs) / 126.0 / 30.0 / 27.0 / 4.8 / 0.065
Temperature (0C) / 566.0 / 566.0 / 294.2 / 37.7
Flowrate (t/h) / 399.7 / 440.6 / 53.5
The above data are given for the following site conditions: dry bulb temperature 23,4°C, relative humidity 77%, atmospheric pressure 1,011 bar.
2.2 Maxi summer conditions, net electrical output ≥ 175,5 MWe
Input Data / HP inlet / HP outlet / IP inlet / LP inlet / CondenserPressure (bar abs) / 122.3 / 29.4 / 26.4 / 4.6 / 0.122
Temperature (0C) / 566.0 / 566.0 / 292.6 / 49.8
Flowrate (t/h) / 387.5 / 430.7 / 50.1
The above data are given for the following site conditions: dry bulb temperature 41 °C, relative humidity 77%, atmospheric pressure 1,011 bar.
2.3 Mini winter conditions, net electrical output ≥ 199,0 MWe
Input Data / HP inlet / HP outlet / IP inlet / LP inlet / CondenserPressure (bar abs) / 128.2 / 30.9 / 27.8 / 4.9 / 0.053
Temperature (0C) / 554.8 / 554.5 / 295.1 / 34.0
Flowrate (t/h) / 410.4 / 456.3 / 58.3
The above data are given for the following site conditions: dry bulb temperature 6,5 °C, relative humidity 77%, atmospheric pressure 1,011 bar.
2.4 Maxi summer conditions with supplementary firing, net electrical output ≥ 194,0 MWe (OPTION)
Input Data / HP inlet / HP outlet / IP inlet / LP inlet / CondenserPressure (bar abs) / 133.9 / 32.5 / 29.3 / 5.1 / 0.129
Temperature (0C) / 566.0 / 566.0 / 298.4 / 50.9
Flowrate (t/h) / 425.2 / 479.6 / 45.5
The above data are given for the following site conditions: dry bulb temperature 41 °C, relative humidity 77%, atmospheric pressure 1,011 bar.
2.5 Steam purity (preliminary)
The steam quality requirement for normal operation is as follows.
Parameter / Maximum value / UnitsCation conductivity / <0.2 (*) / µS/cm (250C)
Silica content (SiO2) / <20 / µg/kg
Sodium content (Na) / <10 / µg/kg
Iron content / <20 / µg/kg
Copper content / <3 / µg/kg
(*) 0.3 µS/cm in units with phosphate conditioning of drum boilers.
2.6 Characteristics of the steam supplied for the Steam Turbine gland steam system: Later.
2.7 Values to be completed by the contractor:
see data sheet annex 1.
3. OPERATING CONDITIONS
For the hot start-up (less than 10 hours after shutdown), the Power Plant shall be capable of achieving full load from start time in less than one hour, therefore the Steam Turbine set must be at 100% load at less than 25 minutes (PRELIMINARY).
3.1 Steam Turbine Normal operation
The control and supervision of the Power Plant are done from the Central Control Room, therefore the Contractor shall provide the necessary data for the remote control of its supply.
In case of house load operation the Power Plant shall be capable of independently sustaining auxiliaries.
The Works shall be designed for automatic starts, either hot, warm or cold status. That means the control of Steam Turbine Generator equipment is foreseen for all the operating conditions (i.e.: tank levels control, pumps start up conditions…).
All equipment (valves, motors…) are foreseen for operation in automatic or manual mode from the Central Control Room. It includes main vent and drain valves.
The automatic control must take into consideration any failure of Combustion Turbine, Boiler, Steam Turbine or Condenser.
3.2 Normal operating conditions physical parameters range
· Inlet pressure and temperature :
- sliding pressure from 50% to 100% load and constant temperature,
- minimal HP pressure at the Steam Turbine limit of supply : 67 bar (a) corresponding to about 50% load of the Combined Cycle with only one file (one C.T. and one HRSG) at 100% load in operation (in yearly average conditions).
· Maximum operating pressure :
- HP inlet : 135 bar (a) (option : 140 bar if supplementary firing)
- HP outlet : 35 bar (a) (option : 37 bar if supplementary firing)
- IP inlet : 32 bar (a) (option : 34 bar if supplementary firing)
- LP inlet : 7 bar (a)
Annex 1
Data sheets: values to be completed by the Contractor
(input data are in bold)
Yearly Average Design / Max Summer Conditions / Max Summer with suppl. firing (option) / Min Winter Conditions / Yearly average with 1 fileDry bulb temperature (0C)
Relative humidity (%) / 23.4
77 / 41
77 / 41
77 / 6.5
77 / 23.4
77
HP inlet (before main stop valve)
Pressure (b. a)
Temperature (0C)
Enthalpy (kJ/Kg)
Flowrate (t/hr) / 566.0
399.7 / 566.0
387.5 / 566.0
425.2 / 554.8
410.4 / ~ 67.1
566.0
207.9
HP outlet to the HRSG:
Pressure (b. a)
Temperature (0C)
Enthalpy (kJ/Kg)
Flowrate (t/hr)
IP inlet:
Pressure (b. a)
Temperature (0C)
Enthalpy (kJ/Kg)
Flowrate (t/hr) / 566.0
440.6 / 566.0
430.7 / 566.0
479.6 / 554.5
456.3 / ~13.9
566.0
226.1
LP inlet:
Pressure (b. a)
Temperature (0C)
Enthalpy (kJ/Kg)
Flowrate (t/hr) / 4.8
294.2
53.5 / 4.6
292.6
50.1 / 5.1
298.4
45.5 / 4.9
295.1
58.3 / 2.3
275.0
14.5
LP outlet :
Temperature (0C)
Enthalpy (kJ/Kg)
Flowrate (t/hr)
Steam quality (%)
Axial velocity (m/s)
Pressure at LP ST exhaust (Mbar) / 65 / 122 / 129 / 53 / 42
HP Steam Flowrate for Turbine gland system (t/h)
Generator electric losses (kWe)
Generator gross output (kWe)*
Steam Turbine and Generator
Auxiliaries power (kWe)
Generator net electrical output (kWe)
* after excitation power deduction