Steam Engines

The preventive maintenance of steam turbine mainly entails frequent servicing of the parts. This will ensure a smooth performance of the steam turbine.

only moving blades

Benjamin Franklin Isherwood

I'm not exactly sure but if I had to guess I would say it's because the smoke form the burning coal would turn it black so they just started with black instead of having a train that was 2 colours

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Interestingly enough there were a lot of steam engines painted bright colours. The Canadian Pacific had some that were silver and and black with maroon running boards, the Mallard and Flying Scotsman were painted brightly as was the Quicksilver.

Black became a common colour after 1880, when coal was primarily used and, as the first person who answered this question said, the coal was so grimy, it just became easier to paint everything black.

However, if you search through lists of trains, you will see companies began painting their locomotives again after 1900, especially if they were passenger trains to make the trains look more attractive.

Nozzles are designed to increase the steam velocity.

Firstly, the responce given to the steam engine was not good. The industries had not started using it as soon as it was improved by James watt. But gradually the invention and its benefits came into news and the industrialists started buying the steam engines for their factories

One of the byproducts from todays gasoilne is a lot of carbon build up on internal engine parts inclusing the intake, the intake valves and the top of the pistons and on your oxygen sensors in the exhaust manifolds. Decarbonation is where a mixture of chemicals is introduced into your engine while running and breaks down this carbon deposits either by a chemical reaction or a molecular bonding action. Once carbon begins to build up it begins to hold heat which will place heat in areas not designed for it. Especially on the back edge of intake valves, the fuel begins to be affected by the carbon deposit before it gets to burn completely and sometimes you will hear this as ping and knock. I have heard several good things about this procedure and will consider having it done in the future. One thing you can do to help stave off this carbon deposit is to buy top tier gasolines that have a lot more cleaning detergents in them. Do a Google search for top tier gasolines and you will find the name brand sof gasoline that have the best additives and they are not always the most expensive fuels out there. If nothing else, these top tier gasolines help reduce the build up of sulpher on the fuel sending unit in your gas tank. Try to be present when the decarbonation is done and watch what comes out of the exhaust. Your car should run better after you have it done. I am considering having it done at 50,000 miles on mine but that is a ways off. If your mechanic has suggested this, you can always ask him for the name of someone else that he did it for and call them and ask what they thought of the procedure. There are some do it your self kits out there but they may be a bit pricey and some units for the do it yourselfer are not quite as effective as a professional unit. Be aware some shops offer this as a way to just make money, so ask why you are being offered this procedure and see what is said, and then take some time to think about what I have explained to you and see if makes sense to have it done now, or wait.

You don't start a large turbine cold. Typically, the lubrication system is started, the turning gear is engaged and warming steam (a small amount of steam, not enough to turn the turbine) is admitted to the turbine to warm and initially expand the shaft and casing. If this isn't done, thermal shock from the admission of high pressure superheated steam into the cold turbine could damage it.

it is the pressure test used to determine the operating pressure of the pressure relief valves (CDTP).

The major impact was how it could be implemented into many things..... it was used to run machinery. So now factories could be built anywhere, not just along fast rivers. Products could be shipped faster when it was implemented into the Steam Locomotive and Steam Boat, and that was a major economical boost for us because the quality of crops would be much better so that meant more money. So it was important for its impact on the economy and its impact on vehicles to transport goods and people (because people were spreading due to the Louisiana purchase.)

+++ Being more specific, James Watt's first contribution was discovering how to make the early steam-engines, which were confined to pumping water from mines, much more efficient. I.e they needed less coal to pump the same volume of water. His second contribution was the development of the Crank - the basic mechanism we now take for granted in converting reciprocating to rotary motion, hence the sort of commercial development outlined by the first answer.

Boiler horsepower equals 9809.5 watts.

It was used for rating steam boilers and is equivalent to 34.5 pounds (about 15.6 kg) of water evaporated per hour at 212 degrees Fahrenheit (100 degrees Celsius).

Hiram Maxim in 1893

page 32 of
Aviation and the Role of Government By Harry Lawrence

Stop Boiler Valve (or Crown Valve) is installed on an outlet line of a boiler. It's purpose is isolation of a boiler from a downstream steam line. Its position may be either open or close, it cannot be used for throttling of steam.

The spinning jenny soon became what is known today as the loom but i don't know about the steam engine.

STEAM High pressure 15 PSI

Hot water boilers 160 PSI and or 250 DEGREES F

They consist of the hydraulic pressurizing fluid, a prime mover I.e. A pump to pressurize the fluid, transmission pipes, and actuators eg: telescopic hydraulic tubes, to convert pressure energy to mechanical energy

Pneumatic systems are inherently more dangerous than hydraulic systems at the same pressures. Most states have laws governing the construction of compressed air systems for just this reason. The ASME Code section 8 specifies rules for construction of air tanks (unfired pressure vessels).

There are less regulations on constructing hydraulic systems.

An overpressure on an air tank could result in the explosive destruction of the tank, whereas a cracked hydraulic tank would result in just a leak.

To calculate tph to megawatts you need to know how many tph are in one megawatts. The equation is 1 mw is equal to 4 tph.

Steam economy is the ratio between total steam evaporated and steam consumed Se=Steam evaporated/steam flow at start should be above 1 for multi effect systems

Hood spray is injection of water near the outlet part of the last stage of the low pressure turbine to prevent overheating of the turbine exhaust hood and blades when running at partial (less than 35%) load). This phenomena is caused by partially stalled steam flow at the blade roots (steam is recirculating with turbulence at those parts and heating up its self and the blades due to friction losses)

goose neck have following two functions:

1. It increase the speed of flue gas in convective zone of the boiler, as velocity increase heat transfer rate also increases which is necessary for super heaters.

2. It divert the path of flue gas and spread it in all corners of the boiler,...

It is a stop valve placed on an auxiliary piece of equipment. Or it could be placed at the steam main to feed an auxiliary steam system (heating, auxiliary pumping. etc.). It is not the Main steam stop for the boiler or the prime mover (engine, turbine, process), it is for a secondary service.

When the steam turbine can not maintain its selected or designed speed.Type your answer here... Speed fluctuating from low to high speed continously.