Md. Tanvir Ahmed

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⚙️ Gas, Steam & Combined Cycle Power Plant
🔌 Practical operation | Protection | Troubleshooting
📘 Learn • Ask • Share | Engineers worldwide
🌍 Content for global power professionals.

26/05/2026

Turbine maintenance work.

25/05/2026

Steam turbine modernization.

25/05/2026

GE steam turbine expansion.

25/05/2026

A combined cycle power plant (CCPP) is a type of power station that generates electricity by combining two thermodynamic cycles—usually a gas turbine cycle (Brayton cycle) and a steam turbine cycle (Rankine cycle)—to improve efficiency.
How it works
Gas turbine stage (first cycle)
Air is compressed and mixed with fuel (like natural gas).
The mixture is burned, producing high-temperature gases.
These gases spin a gas turbine, generating electricity.
Heat recovery stage
Instead of wasting the hot exhaust gases, they are passed through a Heat Recovery Steam Generator (HRSG).
This produces steam from water.
Steam turbine stage (second cycle)
The steam drives a steam turbine, generating additional electricity.
Why it’s called “combined cycle”
It combines:
Brayton cycle (gas turbine)
Rankine cycle (steam turbine)
Using both cycles together extracts more energy from the same fuel.
Advantages
High efficiency (up to ~60% or more, compared to ~35–40% for simple plants)
Lower fuel consumption
Reduced emissions (less CO₂ per unit of electricity)
Better use of waste heat
Disadvantages
More complex design and higher initial cost
Requires high-quality fuels (typically natural gas)
Needs careful maintenance
Simple analogy
Think of it like using the same hot air twice:
First to spin one turbine
Then to boil water and spin another turbine
So you squeeze out more energy instead of wasting heat.

25/05/2026

How Plate Heat Exchanger works!

24/05/2026

Siemens SST6-5000 steam turbine.

What could be the possible reasons behind this condenser tube leakage/damage?
24/05/2026

What could be the possible reasons behind this condenser tube leakage/damage?

23/05/2026

Siemens SGT 800 Gas Turbine.

What is this inside Condenser.
23/05/2026

What is this inside Condenser.

23/05/2026

IP turbine rotor inspection

22/05/2026

GE D11 Steam turbine working principle.

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