What is the difference between condensate and back-pressure steam turbine?

In a condensing turbine, the heat that is not absorbed goes on to be condensed and represents wasted energy. In a non-condensing, (i.e., back-pressure) turbine, the heat that is not absorbed is used effectively in a downstream process.

What is the difference between condensing and non-condensing steam turbine?

Normally exhaust steam is already wet (thus partially condensed); it then goes to a condenser at vacuum pressure to complete the cycle. Non-condensing or back-pressure turbines are those used in CHP plants to produce (aside from power) steam for industrial or heating uses.

What is back-pressure in steam turbine?

The back pressure turbine is used for supplying process steam to the facilities in private-use power producers. This type of steam turbine supplies not only electricity but also steam to various process requirements.

What is a condensing steam turbine?

Condensing steam turbines are most commonly found in electrical power plants. These steam turbine exhaust steam in a partially condensed state, typically of a quality near 90\%, at a pressure well below atmospheric to a condenser. To maximize turbine efficiency the steam is expanded, doing work, in a number of stages.

Why back pressure turbine is called back pressure?

If only a proportion of the steam passing through the first stages of the turbine is used for process heat, the unit is called a pass-out turbine. If all the steam is used for process heat, the unit is called a back-pressure turbine.

What is condenser back pressure?

If you go to see, back pressure of the turbine and vacuum off the condenser are quite synonymous. The exhaust of the steam turbine is at a positive pressure vis-a-vis the pressure inside the condenser. The condenser operates under vacuum. The vacuum pulls the steam that is discharged after it has done work.

Why do you need back pressure?

However, a little back pressure is a good thing. In fact, it helps. The right size pipe is large enough to breathe well but small enough to create a high exhaust flow. Steps in the exhaust system also create negative pressure waves that travel back to the cylinder and help empty the cylinder of those gases.

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

After providing power for shaft rotation, steam at low pressure and temperature exit the turbine from the outlet into the atmosphere and this is also the main difference between condensing and back pressure turbines. In back pressure turbine the outlet pressure of steam is so low that it cannot be used for any work.

How does a non-condensing steam turbine work?

The non-condensing steam turbine uses high-pressure steam for the rotation of blades. This steam then leaves the turbine at the atmospheric pressure or lower pressure. The pressure of outlet steam depends on in the load, therefore, this turbine is also known as the back-pressure steam turbine.

What is back pressure steam turbine?

Back pressure steam turbine is also called the condensing steam turbine and reason for that is this turbine does not have condenser at its outlet and it has only one outlet. Working of back pressure steam turbine start with the entry of the high pressure steam into turbine power generation section where blades are present.

What are the different types of steam turbines?

All steam turbines can be classified into two categories; extraction (condensing) steam turbine and non-condensing steam turbine also known as back pressure steam turbines.