steam turbine generator?

Question

wHAT IS THE PRESSURE, TEMPERATURE AND VOLUME OF STEAM REQUIRED TO RUN A STEAM TURBINE

Answer 1

Generally 450 psi or higher, 650 F or higher. Volume depends on the HP of your turbine.

While you could use lower temperature steam, you could end up damaging your turbine blades. At 650 F you have dry steam. At 212 the steam is very wet (water droplets). Because even tiny water droplets hitting a turbine at 800 psi will cause damage to your blades.

Answer 2

That's depending the size. If you try to build one from scratch you should do some math to see the pressure over slope and speed of the propellers but taking into consideration the losses of pressure during friction with blades and inside of the elements. It's pretty hard because you have to do a piece of art for not breaking apart at the speeds and temps its using.

If buy one from junk yard you should take into consideration and provide with the pressure indicated on the label from the turbine's casing.

It should be recommended to take one from big trucks, and use the both ends supplying them with steam pressure. The turbines used for big(small) trucks' engines have a double in one turbine, because one is propelled by the hot gases from the exhaust and linked by a shaft with the other which is used to build pressure from atmospheric one.

If you link both of them with the same steam pressure source and then with a generator, you get a steam generator.
Good luck
Dfriend :)

Answer 3

Neither. At these sizes, it's most efficient to use a gas turbine, in which the expanding gas of the burning fuel turns the turbine directly, rather than going through the lossy process of boiling water. A large gas turbine can be as much as 57% efficient in electricity production, which is far higher than a diesel engine. A gallon of diesel fuel contains about 130,000 BTU, or 137 megajoules (MJ). At a 55% conversion rate, that would mean 75.35 MJ of electricity. There are 3.6 MJ in a KWh, so that's 20.9 KWh per gallon of diesel, or 20,930 KWh for 1000 gallons.

Answer 4

A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into useful mechanical work.

It has almost completely replaced the reciprocating piston steam engine (invented by Thomas Newcomen and greatly improved by James Watt and Sir Charles Parsons) primarily because of its greater thermal efficiency and higher power-to-weight ratio. Also, because the turbine generates rotary motion, rather than requiring a linkage mechanism to convert reciprocating to rotary motion, it is particularly suited for use driving an electrical generator — about 86% of all electric generation in the world is by use of steam turbines. The steam turbine is a form of heat engine that derives much of its improvement in thermodynamic efficiency from the use of multiple stages in the expansion of the steam (as opposed to the one stage in the Watt engine), which results in a closer approach to the ideal reversible process.

An ideal steam turbine is considered to be an isentropic process, or constant entropy process, in which the entropy of the steam entering the turbine is equal to the entropy of the steam leaving the turbine. No steam turbine is truly “isentropic”, however, with typical isentropic efficiencies ranging from 20%-90% based on the application of the turbine. The interior of a turbine is comprised of several sets of blades, or “buckets” as they are more commonly referred to. One set of stationary blades is connected to the casing and one set of rotating blades is connected to the shaft. The sets intermesh with certain minimum clearances, with the size and configuration of sets varying to efficiently exploit the expansion of steam at each stage.

When warming up a steam turbine for use, the main steam stop valves (after the boiler) have a bypass line to allow superheated steam to slowly bypass the valve and proceed to heat up the lines in the system along with the steam turbine. Also a turning gear is engaged when there is no steam to the turbine to slowly rotate the turbine to ensure even heating to prevent uneven expansion. After first rotating the turbine by the turning gear, allowing time for the rotor to assume a straight plane (no bowing), then the turning gear is disengaged and steam is admitted to the turbine. For most utility and industrial steam turbines, a starting and loading chart is included in the unit instruction manual. The starting and loading chart is used to guide turbine operators in loading their units in such a way as to minimize rotor and shell thermal stresses, but also minimize the chances of the rotor heating faster than the shell (creating a rotor long condition).

Answer 5

over 212 degreed F

the over two are based on the mechanism and the power required.