Type “TTK 1-OK 1.2″ (1 MWelectrical + 4 MWheat)
Steam turbine type TTK 1-OK 1.2 is a multistage high efficiency turbine, where heat drop is maximally exploited. There are fifteen rows of specially designed rotor blades on the shaft (ten in a high pressure stage and five in the low pressure stage), which rotates with speed of 10500 rpms.
The blades are of integral type which allows possible substitution of individual blade, which is an advantage compared to previous solutions, and provide a high level of efficiency of turbine performance, up to 85%. Stator consists of the stator blade rows that are fixed in the high-and low-pressure turbine casing inserts and two nozzles.
At the ends of the casing labyrinth glands prevent loss of steam and thereby increase the level of turbine efficiency. Inside the turbine casing there is inner labyrinth gland which prevents passage of steam from turbine’s high pressure to low pressure part. The casing consists of upper and lower halves, made out of special steel casting. It contains pipelines for supplying and extraction of steam. The casing is thermally insulated. Bearings are slide bearings lubricated from the oil system. One is radial and one is radio-axial type. Regulating system is such to accommodate simultaneous regulation of speed of rotation and pressure of steam extraction. Turbine has electronic speed governor, allowing remote turbine control and automatic operation of turbine set.
This turbine is result of many years of turbine manufacture experience and is characterised by high level of reliability, durability and low maintenance costs.
COMPARATIVE ADVANTAGES OF STEAM TURBINE
“TTK 1-OK 1.2″
In comparison to competitor’s turbines which have smaller number of stages, (some even one stage), which is much worse in thermodynamic sense, our turbine TTK 1-OK 1.2 is a ffteen stage turbine providing maximum efficiency practically achievable allowing faster investment return and better utilisation.
- Furthermore in case of unlikely emergency failures, TTK experts provide quick on site assistance.
- Continuous training of client’s personnel regarding turbine operation by TTK’s experts.
- Acceptable prices of equipment, maintenance and spare parts.———————————————————————-
Why 1 MWelectrical + 4 MWheat ?
Feasibility studies have shown that the optimal power of biomass powered power plant
(BE-TO) is 1 MW of electricity and approximately 4 MW of thermal power.
These parameters give the best results in terms of:
- Production of energy under status of privileged supplier,
- Production of 8000 hours per year of electrical power and 5000 hours per year of thermal power,
- Prices of forest chips and
- Minimum freight rates.
Larger power plants are less efficient because:
- smaller usage of fuel, because there is no opportunity for the consumption of thermal energy, which is then released in the environment
- Reducing the environmental advantages due to the effect of transport over long distances,
- Excessive wear of roads, e.g. to supply electric power plant of 5MW with fuel, alarge truck of fuel is necessary each hour
- The problem of storing large amounts of ash.
Expert analysis show that large energy resources are available from biomass from agriculture, horticulture and forestry, which together with biomass from industrial and municipal waste (this amount is increased by more than 50%) can reduce oil imports by 650,000 tons annually in Croatia alone.
Since more than 50% of these resources are from lowland areas, and somewhat less from the hilly areas, by construction of such power plants it is possible to satisfy major quantity of small muncipial energy demands (electrical and thermal).
Such facility would enable the production of energy from renewable sources, thus helping the environment and contribute the creation of new jobs for local population.
The construction of such facilities will certainly fit into the local development, since energy is the basis for the development of new possibilities and new businesses, which are the foundation of the productive life.
The overall result is a better quality of life of citizens.
1 MWelectrical + 4 MWheat PLANT SHEMATICS
M – Mass flow (t/hour)
P – absolute pressure (bar)
t – temperature (C)
H – specific entalpy (kJ/kg)
Nel – power on generator terminals (kW)
n – speed of rotation (rpm)