What is the difference between condensing and non-condensing turbines?
There are two different classifications of Combined Heat and Power Steam Turbines; condensing and non-condensing. In a condensing turbine, steam expands below atmospheric pressure (vacuum pressure). However, they are typically more expensive than non-condensing turbines because of the required condenser.
What is non-condensing steam engine?
a steam engine releasing exhaust steam to the atmosphere rather than condensing it to hot feedwater.
What is a condensing steam turbine?
Condensing turbines are most commonly found in electrical power plants. These turbines receive steam from a boiler and exhaust it to a condenser. The exhausted steam is at a pressure well below atmospheric, and is in a partially condensed state, typically of a quality near 90%.
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 is the purpose of a non condensing turbine?
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 condensing type turbine?
The condensing turbines take high pressure steam, expand it in turbine nozzles and blades, and exhaust it to a condenser at lower than atmospheric pressure. It is principally used when power must be generated with minimum steam consumption. These turbines are of bleed cum condensing type. …
Do steam engines reuse water?
It differs from the usual closed cycle condensing steam engine, in that the function of the condenser is primarily either to recover water, or to avoid excessive emissions to the atmosphere, rather than maintaining a vacuum to improve both efficiency and power.
What is a non condensing turbine?
Why vacuum is required in steam turbine?
Vacuum applies to steam turbines because the pressure of saturated vapour above available cooling water is well below 1 bar (typically 17 mbar at 15°C ambient). These shortcomings are examined and used to explain the anomalous response of a turbine to a copious supply of cold winter cooling water.
What is non condensing turbine?
In turbine: Condensing and noncondensing turbines. 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…
Are steam engines better?
The best modern engines show, by the indicator cards, between 60 and 90 per cent of the theoretical effect of the steam ; in all cases the figures vary in proportion as care is exercised’in keeping8 the temperature up in the cylinder. All these are improvements, and they tend toward greater economy in the use of steam.
Why is condenser used in boiler or steam power plant?
The use of condensers in thermal power plant or steam power plant improves the efficiency of the power plant by decreasing the exhaust pressure of the steam below the atmosphere.
What is a condenser in a steam turbine?
Condenser (steam turbine) Condenser refers here to the shell and tube heat exchanger installed at the outlet of every steam turbine in Thermal power stations of utility companies generally. These condensers are heat exchangers which convert steam from its gaseous to its liquid state, also known as phase transition.
What is the temperature of the steam in a turbine?
A steam turbine consists of stationary and rotating blades on an axle. High pressure steam enters the turbine. The steam can be anywhere from 200 °C to 400 °C. The stationary blades direct streams of high pressure steam onto the rotating blades, which turns the axle.
What is the function of air ejector in steam turbine?
Air Ejector for Marine Boiler Feed System / Steam Turbines The air ejector draws out the air and vapours which are released from the condensing steam in the condenser. If the air were not removed from the system it could cause corrosion problems in the boiler.