How many turbine stages are there?

Typical of modern turbines is the Spey two-shaft turbine in which the four stages reach a design point efficiency of a little over 92 per cent.

What are steam turbine stages?

Instead a steam turbine utilises a series of sets of blades, called stages, which break down the energy capture. Each stage is followed by a set of stationary blades (usually called nozzles) which control the steam flow to the next stage.

How many stages are in HP turbine?

There are about 10 stages with shrouded blades in the HP turbine. It the produces about 30-40\% of the gross power output of the power plant unit.

How many stages are there in LP turbine?

Each LP Turbine (low-pressure turbine) is usually double-flow reaction turbine with about 5-8 stages (with shrouded blades and with free-standing blades of last 3 stages). LP turbines produce approximately 60-70\% of the gross power output of the power plant unit.

How many types of turbine are there?

1 Turbine. A turbine is a work producing device. Production of power is achieved by expanding a fluid. Mainly, there are two different types of turbines, steam and gas turbines.

What is a multi stage turbine?

a gas or steam turbine in which the expansion of the steam or gas from its initial pressure to its final pressure and the conversion of its thermal energy into mechanical work takes place in a number of stages arranged in tandem, rather than in one stage.

What is a single stage turbine?

Single stage turbines are generally used to protect the plant against electrical power outages that would shut down critical pump or fan services.

What is Curtis turbine?

The Curtis turbine is a compound impulse turbine, the com- pounding being both for pressure and velocity. This is done by compounding the pressure drop, that is, by using several sets of nozzles, thereby reducing the drop in each set, and reducing the exit velocity of the steam accord- ingly.

What is first stage pressure in steam turbine?

The first stage pressure on GE steam turbines is measured just downstream of the first stage buckets/blades, (just upstream of the second stage nozzle). It is used as a relative measure of steam flow for valve testing and also used as a measure of boiler heat release.

What are the five types of steam turbine?

While based on the flow of steam they can be classified as a single flow, double flow and reverse flow turbines. Similarly, based on exhaust conditions, there are five main types of steam turbines; condensing, non-condensing, automatic extraction, mixed pressure, and regenerative extraction.

What are turbine stages?

Only a small fraction of the overall pressure drop available in a turbine can be extracted in a single stage consisting of a set of stationary nozzles or vanes and moving blades or buckets. Pressure-staged turbines can range in power capacity from a few to more than 1.3 million kilowatts. …