What is the purpose of a non condensing turbine?

What is the purpose of a non condensing turbine?

Non-condensing or back pressure turbines are most widely used for process steam applications, in which the steam will be used for additional purposes after being exhausted from the turbine. The exhaust pressure is controlled by a regulating valve to suit the needs of the process steam pressure.

What is a non condensing turbine?

The non-condensing steam turbine uses high-pressure steam for the rotation of blades. The pressure of outlet steam depends on in the load, therefore, this turbine is also known as the back-pressure steam turbine. This low-pressure steam uses for processing and no steam is used for condensation.

What is the difference between turbine and condenser?

Condensing turbine has two outlets from which one is used to utilize the medium pressure steam for heating process and other outlet do condensation process by utilize the low pressure steam. In condenser water remove heat from steam and condense water is again move towards the boiler of the turbine.

What is condensing type turbine?

The condensing turbine is able to use the total energy of the inlet steam flow to a maximum extent. Therefore, this type of turbine is used for power utilities that want to supply electricity to consumers as much as possible.

What is the difference between back-pressure turbine and condensing turbine?

A condensing turbine does not differ much from a back-pressure turbine in respect of its’ overall dimensions, steam values (with the exception of outlet pressure), delivery time and price. The steam condensing equipment requires some additional “balance of plant” investments plus the availability of cooling water.

What are the two basic types of steam turbines?

Two types of steam turbines must be considered, condensing and noncondensing.

What does non-condensing mean?

adjective. 1Not involving the condensation of steam; specifically designating a steam engine in which the steam on leaving the cylinder is not fed into a condenser but is either reused in some other way, or discharged into the atmosphere. 2That does not undergo or cause condensation.

What is the main difference of condensing and non condensing steam power plants?

Steam turbines are often divided into two types: condensing and noncondensing. In devices of the first type, steam is condensed at below atmospheric pressure so as to gain the maximum amount of energy from it. In noncondensing turbines, steam leaves the turbine at…

What is steam chest in turbine?

These steam chests are located between the reheater and the intermediatepressure (IP) turbines. They are manufactured from alloy-steel castings. They are thinner but larger than the HP steam chests due to lower steam pressures. The steam chests are normally mounted alongside the turbine.

What is the difference between back pressure turbine and condensing turbine?

Why vacuum is necessary in condenser?

Now to ensure proper and continuous flow of steam to condensers at all times, vacuum must be maintained externally. A vacuum is maintained in the condenser so that steam can easily flow and more work can be extracted from the steam in the turbine; this is the reason why vacuum is maintained in condensers.

What makes a steam turbine a condensing turbine?

Condensing or non-condensing exhausts Condensing turbines are those whose exhaust pressure is below atmospheric. They offer the highest overall turbine pressure ratio for a given set of inlet conditions and therefore require the lowest steam flow to produce a given horsepower. A cooling medium is required to totally condense the steam.

When do you need a cooling medium for a steam turbine?

A cooling medium is required to totally condense the steam. Non-condensing or back-pressure turbines exhaust steam at pressures above atmospheric and are usually applied when the exhaust steam can be utilized elsewhere. 3. Extraction or admission Steam is extracted from, or admitted to, the turbine at some point between the inlet and exhaust.

How does steam gain kinetic energy in a steam turbine?

Superheated steam (or dry saturated steam, depending on application) leaves the boiler at high temperature and high pressure. At entry to the turbine, the steam gains kinetic energy by passing through a nozzle (a fixed nozzle in an impulse type turbine or the fixed blades in a reaction type turbine).

What are the fixed parts of a steam turbine?

Fixed Parts : The principal stationary parts in a steam turbine are the fixed blades; throttle valve; steamtight casing; steam chest; nozzle; and bearings, rings, and seals. Fixed Blades : The fixed blades are made of durable stainless steel that has been rolled and drawn.