2x40MW ABB-STAL Laval GT120 Gas Turbine Generators 50Hz.
Designed to operate on HF0
Asking Price: Euro: 2.9MM Each, as is where is, ex works.
Technical Specification at ISO conditions, cooling water 25 degree COutput peak load 40 MW
Output base load 35 MW
Fuel Liquid of diesel quality
Fuel consumption at base load 3.0 kg/secHeat rate 13 200 Btu/kWh
Exhaust mass flow 260 kg/sec
Exhaust temperature 315 degr. C
Main Transformer 10.5 / 130 KvGenerator: ASEA GTA 1629, 11 KV, 50 hz, 3000 rpm, Hydrogen/Water cooled at 2 bar 55,000 KVA at 0.8
44 MW, 0.6 bar 50,000 x 0,8 40 MW, Air cooled only 38,000 x 0,8 30,8 MW
Operating data: Operated hours 8,180 hours. Starts 1,155. Commissioning year 1960
The plant was extensively refurbished in 1990/1991. A number of blades were changed while others went through a coating procedure. An extensive reconstruction and modernization was made to the internal fuel regulating system. A new turbine regulator was installed and partially a computerized signal and monitoring system was installed.At the time, the intermediate cooler was not refurbished, an issue that must be checked before any commercial start-up of operations. The total investment cost is indicated to be comparable 0.5MM Euro.
Due to the limited capacity of the intermediate cooler the plant will not be possible to operate at full load.
The plant is possible to start from a dead net. Start up is provided for by a Deutz A8M 528 diesel generator.
The plant can be used for reactive compensation.
Perfomance as a function of ambient conditions:
The peak data, at a design ambient temperature of +5 degrees Centigrade, is 40 MW(e) with a heat rate of 13'200 BTU/kWh. Correspondingly, the plant efficiency (based on the fuels lower heating value) is 25,9%. The fuel input necessary to operate the unit is thus 40/0,259 = 155 MW.The gas turbine is operating on liquid fuels (diesel or Jet-A1) and can be converted to burning natural gas. Since the combustors are external, the modifications should be minor, however, the cost of this is presently not known. Should natural gas be used the amount of natural gas can estimated by dividing the fuel input (155 MW) with the lower heating value of the fuel, e.g. natural gas is 10 MWh/Nm3. Thus the amount of gas can be estimated to some 15'500 Nm3/h at full load.
The plant output is also defined by operation mode, i.e. if the plant is working for peaking purposes (low duration, maximum output) the output is the above mentioned 40 MW - should the plant be in use for base load production the corresponding out put is 35 MW(e).
Both plant efficiency and plant out put is further a function of the outdoor temperature. Below is a very rough table indicating the relations. Please pay attention to the fact that the table was calculated by using a temperature-to-performance curve from a different gas turbine manufacturer, thus the data given below must not be used for any other purposes than as indications!
A. Peak Load Operations
Outdoor [' C] +5 +10 +20 +30
Output [MW el] 40, 38, 36.5, 36
Heat Rate [BTU/kWh] 13,200 13,300 13,400 13,600
B. Base Load Operations ("Electrical Base Load")
Outdoor [' C] +5 +10 +20 +30
Output [MW el ] 35, 33.5, 31.5, 29
Heat Rate [BTU/kWh] 13,400 13,600 13,900 14,300
