Gas Turbine Services | EthosEnergy (2024)

FAQs

How often should gas turbine be maintenance? ›

Inspection and maintenance intervals

The recommended maintenance intervals are similar for most makes of gas turbines. These are: Combustor inspection at 8,000 equivalent operating hours (EOH) Hot gas path component at 24,000 EOH.

Common causes of industrial turbine malfunctions include wear and tear, improper maintenance, operational misuse, compressor complications, combustor issues, blade fatigue, cooling system failures, fuel quality issues, environmental factors such as foreign object ingestion, adverse atmospheric conditions, and corrosive ...

Shutting down a gas turbine is a gradual process to prevent damage. First, the turbine is unloaded and kept idle for a bit. Then, the fuel supply is cut, causing the turbine to slow down and eventually stop completely.

Recent studies have proved that extreme thermal loads, frequent vibrational effects, fatigue, coating erosion, and stress leading to deformations are the leading cause of gas turbine blade failures.

Most wind turbines require maintenance at least once every two years. However, some wind turbines need maintenance more often than others. Wind Turbine Technicians, or “Windtechs” as they are called in the industry, maintain wind turbines.

Gas Turbines? 30 to 40 years. As long as there are parts, you can keep them going. Steam Turbines, 30 to 100 years, as long as there are parts available.

The main disadvantage of gas turbines is that, compared to a reciprocating engine of the same size, they are expensive. Because they spin at such high speeds and because of the high operating temperatures, designing and manufacturing gas turbines is a tough problem from both the engineering and materials standpoint.

Rotor fragments were generated in 88 of the failures experienced and, of these, 16 (18.2 percent of the fragment-producing failures) were uncontained. This represents an uncontained failure rate of 2.1 per million gas turbine engine powered aircraft flight hours, or 1.3 per million engine operating hours.

After few years of operation, turbines can show declined performance due to various reasons. Main problems accurse in hydro turbine is cavitation, erosion,fatigue and material defects.

Possible causes. Engine failures can be caused by mechanical problems in the engine itself, such as damage to portions of the turbine or oil leaks, as well as damage outside the engine such as fuel pump problems or fuel contamination.

What controls the speed of a gas turbine? ›

The Role of Gas Turbine Control Systems

Speed and Load Control: Gas turbine control systems regulate the speed and load of the turbine to match the energy demands, ensuring efficient operation and stable power generation.

A gas turbine trip is an operational event in which a GT shuts down from a certain working point by means of an unscheduled maneuver [22].

However, the more common type of gas turbine engine fouling is to the compressor. In fact, it's been shown that 70 to 85% of all performance loss to in-operation gas turbine engines can be attributed to compressor fouling. That makes fouling the single greatest cause of performance degradation.

Creep causes the blade to come into contact with the shell, which will cause turbine blade failure. The distance between the blade tip and the adjacent shell (shell) must be kept to a minimum to extract the maximum amount of energy from the heat flow of combustible gas from the nozzle in preventing failure.

Keep the turbine clean: Regular cleaning of the gas turbine, including the compressor inlet and exhaust ducts, can help prevent debris buildup and improve airflow. Address leaks promptly: Gas leaks can be a serious safety hazard and can also cause performance issues. Any leaks should be addressed promptly.

As you know that GE recommends a Major Inspection of Heavy Duty Gas Turbines every 48000 hours.

In general large frame gas turbines usually change their turbine oil every 5 to 7 years and the life of steam turbines is approximately double this. That being said, there are many steam turbines today that are operating with turbine oil that is greater than 15 or 20 years old.