Which parameters influence the performance of gas turbine?

Which parameters influence the performance of gas turbine?

Gas turbine site performance is directly affected by inlet air density and air environmental conditions. Since produced power and heat rate vary as a function of inlet temperature, pressure and inlet duct and exhaust duct pressure drop, vendors supply correction curves to convert ISO conditions to site conditions.

What are the properties required of a gas turbine engine blade?

In case of turbine blades, the leading edge has maximum temperature and thus heat load. Impingement cooling is also used in mid chord of the vane. Blades are hollow with a core. There are internal cooling passages.

What are the 2 significant performance parameters of the gas turbine?

Two significant performance parameters are the pressure ratio and the firing temperature. The fuel-to-power efficiency of the engine is optimized by increasing the difference (or ratio) between the compressor discharge pressure and inlet air pressure.

How is gas turbine performance measured?

A test facility to measure performance of a micro gas turbine was set up and performance parameters such as turbine exit temperature, exhaust gas temperature, engine inlet temperature, compressor discharge pressure and temperature, and fuel and air flow rates were measured.

What factor limits the maximum temperature in a gas turbine cycle?

High temperature corrosion and oxidation of the gas turbine material is a significant life limiting factor. The combustion gases, particularly from heavy fuels, contain several aggressive corrosion elements such as sodium, potassium, lead and vanadium which cause corrosion of the hot gas path components.

What type of structure is desirable for a turbine blade?

The characteristics that make composites, especially glass fiber-reinforced and wood/epoxy composites, suitable for wind turbine blades are low density, good mechanical properties, excellent corrosion resistance, tailorability of material properties, and versatility of fabrication methods.

What are the four basic elements of turbine section?

TURBINE CONSTRUCTION  The basic components of the turbine are the combustion discharge nozzles, the nozzle guide vanes, the turbine discs and the turbine blades.

Which are the primary parameters used for monitoring of gas turbine engine operation?

In the literature, parameters such as engine fan speeds, vibration, oil pressure, oil temperature, exhaust gas temperature (EGT), and fuel flow are used to determine performance deterioration in gas turbine engines.

What is a turbine blade?

A turbine blade is the individual component which makes up the turbine section of a gas turbine or steam turbine. The blades are responsible for extracting energy from the high temperature, high pressure gas produced by the combustor.

How does the number of turbine stages affect the blade design?

The number of turbine stages can have a great effect on how the turbine blades are designed for each stage. Many gas turbine engines are twin-spool designs, meaning that there is a high- pressure spool and a low-pressure spool. Other gas turbines use three spools, adding an intermediate-pressure spool -and low pressure spool.

Does high pressure temperature affect gas turbine blade performance?

Abstract –High pressure temperature (HPT) turbine blade is the most important component of the gas turbine and failures in this turbine blade can have dramatic effect on the safety and performance of the gas turbine.

What are the limiting components of a gas turbine?

For gas turbines, the turbine blades are often the limiting component. The highest temperature in the cycle occurs at the end of the combustion process, and it is limited by the maximum temperature that the turbine blades can withstand. As usual, metallurgical considerations (about 1700 K) place an upper limits on thermal efficiency.