Fault of Electric Cable
Energy Bands in Crystals
Gallium Arsenide Semiconductor
Atomic Energy Levels
Electric Pressure Cooker
Electric Power Generation
Power Plants and Types of Power Plant
Thermal Power Generation Plant or Thermal Power Station
Hydro Power Plant | Construction Working and History of Hydro power plant
Nuclear Power Station or Nuclear Power Plant
Diesel Power Station
Why Supply Frequency is 50 Hz or 60 Hz?
Economiser in Thermal Power Plant | Economiser
MHD Generation or Magneto Hydro Dynamic Power Generation
Cogeneration | Combined Heat and Power
Thermoelectric Power Generators or Seebeck Power Generation
Cost of Electrical Energy
Gas Turbine Power Plant
Steam Boiler | Working principle and Types of Boiler
Methods of Firing Steam Boiler
Fire Tube Boiler | Operation and Types of Fire Tube Boiler
Water Tube Boiler | Operation and Types of Water Tube Boiler
Steam Boiler Furnace Grate Firebox Combustion Chamber of Furnace
Feed Water and Steam Circuit of Boiler
Boiler Feed Water Treatment Demineralization Reverse Osmosis Plant Deaerator
Coal Combustion Theory
Fluidized Bed Combustion | Types and Advantages of Fluidized Bed Combustion
Steam Condenser of Turbine
Jet Condenser | Low Level High Level Ejector Jet Condenser
Surface Steam Condenser
Economics of Power Generation
Cooling Tower Useful Terms and Cooling Tower Performance
Cooling Tower Material and Main Components
Power Plant Fire Protection System
Hydrant System for Power Plant Fire Protection
Medium Velocity Water Spray or MVWS System for Fire Protection
Foam Fire Protection System
Fire Detection and Alarm System
Gas Extinguishing System
Solar Energy Solar Electricity
Solar Energy System | History of Solar Energy
Types of Solar Power Station
Components of a Solar Electric Generating System
What is photovoltaic effect?
Staebler Wronski Effect
Working Principle of Photovoltaic Cell or Solar Cell
Characteristics of a Solar Cell and Parameters of a Solar Cell
Solar Cell Manufacturing Technology
What is a Solar PV Module?
What is Standalone Solar Electric System?
Steam Dryness Fraction
Superheated Steam and Steam Phase Diagram
Vapour Properties Mollier Chart Heat Capacities
What is Steam Flashing?
How to Calculate Steam Consumption During Plant Start Up
Effective Steam Distribution System
What is Water Hammer?
Engineering Thermodynamics Part 1
Science of Engineering Thermodynamics Part 2
Basic Law of Conservation and First Law of Thermodynamics
Carnot Cycle and Reversed Carnot Cycle
Enthalpy Entropy and Second Law of Thermodynamics
Rankine Cycle and Regenerative Feed Heating
Rankine Cycle for Closed Feed Water Heaters and Rankine Cycle Cogeneration
Ideal Verses Actual Rankine Cycle
Rankine Cycle Efficiency Improvement Techniques
Basic Wind Energy
Wind Turbine | Working Types and History of Wind Turbine
Theory of Wind Turbine
Gas Turbine Power Plant
This is because the mechanical power developed by the gas turbine can be shared by the air compressor for its operation along with the alternator. The mechanical energy required to compress the air must be more than the mechanical energy developed by the compressed air. But here the mechanical energy developed in the gas turbine by compressed air contributes both for compressing the air and producing the electricity. How can it be possible? The answer to this question is that the required energy developed in the system comes from the heat energy produced by combustion of fuel. Here, in the gas turbine power plant, compressed air only acts as a fluid. This type of power plant is not used for producing electrical power in commercial scale but normally used as a standby plants in a hydroelectric station for supplying auxiliary electricity during starting of the main power plant.
Advantages of Gas Turbine Power Plant
- There is no need of boiler as in the case of a steam power generating plant. As the boiler is not used the auxiliaries associated with the boiler are also absent in the gas turbine power plant hence the design is much simpler than the steam power plant.
- For the same reasons as mentioned above, the size of the gas turbine power plant is much smaller than that of a same capacity steam power plant.
- The manufacturing, engineering, installation and commissioning costs are much lower. The running cost is also less than that of same rated steam power plant.
- As the design and construction are simpler than a same capacity steam power plant, the maintenance cost also smaller in the gas turbine power plant.
- Gas turbine itself is much simpler in design and construction than a steam turbine.
- This power plant can be started much quickly even in cold condition.
- In steam power plant the boiler is kept operative even at off-load condition because restarting a boiler is much expensive and time-consuming process. But in the case of a gas turbine power plant entire plant can be kept inoperative at offload condition. Hence, this system is free from standby losses.
Disadvantages of Gas Turbine Power Plant
- For running the gas turbine system, compressed air is required. When the plant runs, the compressor runs and supplies the required compressed air. But when the plant just starts its operation, there is no compressed air previously available but this required compressed air cannot be produced before the compressor is run. The drawback of the system can be overcome by running the compressor by some external means before actual starting the plant.
- In this system, a major part of the mechanical power developed by the gas turbine is utilized to run the compressor which causes the low output of the system.
- A major portion of the heat energy of fuel combustion is lost to exhaust air. The exhaust heat cannot be reutilized efficiently like as in the case of a steam power plant.
- The internal temperature of the combustion chamber is very high. This highly tempted part of the system reduces the overall life span of a gas turbine power plant compared to other forms of a power plant.