Technically Nerdy is a channel that will focus on the fun things I like to do outside of 3d printing. Let's Play gaming? Sure! Fun stuff with the kids? Why not! Computer things? Yes! I am proud to be a nerd, and this is where I'll let my nerd flag fly.
The biggest heavy frame industrial gas turbines that Siemens come in at over 500 MW and weight over 500 tonnes. The waste heat coming out the back of those goes through a heat recovery steam generator that creates steam which is then put through one of the steam turbines in this video. The so called combined cycle gas turbine power plant is a gas turbine, a heat recovery steam generator and a steam turbine running in combination and have very high heat efficiencies.
Nerd-up…. These turbines are so heavy that they need to be continuously spun, even slowly, when warm. The rotor is more malleable at higher temperatures, and is susceptible to imbalances.
The Navy Destroyers I served on had the high-pressure and low-pressure steam turbines separate with the main steam entering in at 1200 psi at 975°F, exhausting out through a very large crossover pipe to the low-pressure turbine, then out the bottom to the saltwater condenser to be returned to water, and continue the cycle. Incredible machines….
Are the blades replaceable, as they are in jet engine turbines? Also! What is the change in blade angle and spacing (rotor and stator) from beginning to end?
Speed of sound WHERE? In air At normal temp and pressure? Or the local speed of sound inside the turbine which is steam at high temperature and pressure... Which is it?
the Siemens rep should have explained each rotating blade sliver is sandwiched between a static blade unit ... these turbines have dozens of these pairs ... the steam escapes through each sliver ... the rotating section forces steam up followed by its static blade forcing steam direction down ... this tension powers the rotation
What makes it more cool is the fact that the central shaft is made from a 100 tonne single piece of forged steel that was once red hot and squeezed in a hydraulic press into shape.
Never would have expected 160 bar. Clearance between the stator and rotor is tight, even for the smaller sections. I have a feeling there is a specific start procedure that allows thermal normalization prior to rotation.
Warming of the case and stretch out of the turbine rotor using steam for heat. Also the while this is happening the rotor is on barring gear turning very slow like 1 rpm to allow for the rotor sag between bearings to straighten out
I wonder, these main propulsion cannot be run by WASTE HEAT of lower than 250 °C of low pressure steam but they(turbine) need at least Main Source of 350°C, medium to high pressure steam to provide the power for 100,000- 300,000 people (250 MW).
i knew this guy was an idiot fromthe wake he talks but when i see atmospheric pressure at sea level explained to someeone who is supposed to be unbamilliar with it as a thousand millibars instead of one bar is just...
I worked in an industrial steam turbine factory of Siemens partner in China for 12 years. I like the art-of-the-state Siemens- designed steam turbine products so much. The job experience there shaped me a lot and benefited my later job. Simens is great!
250Mw no es tanto, montones de centrales en España han tenido turbinas para generar 350Mw y si nos vamos a Manjung IV en Malasia, hay dos turbinas de vapor que mueven generadores de 1000Mw...
