what are the advanges of using steam turbine against electrical motor in driving rotating machinery?
100519
well firstly you are using less electricity and also the steam is not polluting the atmosphere directly. apart from that there aren't really any other advantages i can think of
321407
Gas turbines have enormous power and speed,if you start your compressor with an open valves there will be no drag to the gas turbine, therefore the possibility of a "runaway" or overspeed will occur, destroying everything inside your compressor,closing the valves create a resistance to the driver through your pistons or screw (whatever type of compressor you are using,)keeping you from having a "runaway" or overspeed.
952593
An electric generator is a device used to convert mechanical energy into electrical energy.\n\nThe generator is based on the principle of "electromagnetic induction" discovered in 1831 by Michael Faraday, a British scientist. Faraday discovered that if an electric conductor, like a copper wire, is moved through a magnetic field, electric current will flow (be induced) in the conductor. So the mechanical energy of the moving wire is converted into the electric energy of the current that flows in the wire.The mechanical energy needed to turn the generator comes from the brown hand crank at the front of the generator. In a hydroelectric power plant, the mechanical energy to turn the generator comes from the water turbine, which is turned by the force of falling water. The hand crank causes the red wire to spin inside a magnetic field (the blue lines). As Faraday learned, moving the wire through the magnetic field causes electric current to flow in the wire. The turning red wire is connected to a volt meter, which shows the amount of electric current that is produced. In a hydroelectric plant, the generator is connected to transmission lines that deliver the electricity to your home or business.\n\nThe controls allow you to control the speed and direction of the generator and turn portions on and off for greater clarity. You can also use the radio buttons to show a direct current, or DC generator (with commutator) or an alternating current, or AC generator (without commutator).
302486
Umm, that depends on the pulley used.  The smaller pulley on the blower, or the larger on the crank, the faster the impellers spin, the more pressure, and HEAT are generated.  Thing is, before long you're creating so much heat that you lose power.  Since engines, intakes, fuel, and intake coolers (intercoolers, alcohol injection, etc..) vary from application to application, there is no one correct answer.  And even if you could run absolute maximum theoretical pressure, which you would never want to run becasue you'd get so little power, you would burn up the blower and/or your motor in a matter of seconds.  literally.  So you probably want to talk to Paxton; tell them what car, engine, mods, etc., and they will tell you how to get the most out of that blower.  Good luck!
156475
Moving water as in a river or water tuned to steam can turn a turbine and produce electricity.  http://en.wikipedia.org/wiki/Turbine
731398
Slip Rings are most commonly used.  If the power level is low you might be able to magnetically couple the power through the shaft using a pair of concentric coils.
253005
The phase differences between the three phases of the polyphase electrical supply create a rotating electromagnetic field in the motor.\n\nThrough electromagnetic induction, the rotating magnetic field induces a current in the conductors in the rotor, which in turn sets up a counterbalancing magnetic field that causes the rotor to turn in the direction the field is rotating. The rotor must always rotate slower than the rotating magnetic field produced by the polyphase electrical supply; otherwise, no counterbalancing field will be produced in the rotor.
796308
It depends on the type of motor. A dc motor may be used as a generator provided it is either a permanent magnet type or has sufficient residual magnetism in the iron to start off the generation.
283030
This could be a very wide topic. You need to be more specific for a decent answer there are various types of electric motor, but many 1000s of different electric machines!
438034
i have no clue, not sure what this competition would be anyways, might want to include the goal of what the windmil will do, what size is it going to be...\n\ni'd say research with like those windmill powerplants, they are shaped like HUGE propellers i think, i'm sure that would provide alot of torque and be efficent.\n\nthe companies making those windmill powerplants put LOTS of money into research to figure out how they can have their designs make the most electricy, so researching what they have found would probably help your project
916842
I have a small wind turbine which uses permanent magnets instead of a field coil.  The main benefit I can see is in keeping the electronics on the ground.  As the wind speed increases, the output voltage (and power) from the generator will increase as well.  I have a shunt regulator at the batteries to prevent overcharging.  Everything outside on the tower is very simple and less likely to break.  Other than mechanical breakdown, repairs to the system can usually be made on the ground level.\n\nOn a gasoline powered generator, sometimes permanent magnets are turned inside the AC output coils.  This eliminates the need for brushes and the voltage regulator board.  AC output coils have been designed to supply 120VAC at 3600RPM.  If the engine speed changes, the output voltage will change as well.  Output voltage will also change with load variations.\n\nI have more generator information online.\nhttp://members.rennlist.org/warren/genfaq.html\nhttp://members.rennlist.org/warren/generator.html
61139
Any electric motor can be replaced with a gas engine. They both spin. Some gas engines run on gasoline, some run on natural gas.\n\nOn the other hand, there are systems called "absorption chillers". There is a mixture of ammonia and water. That mixture is heated by burning natural gas. As the water is boiled off, it is cooled back to its liquid state and sprayed onto pure ammonia. The ammonia sucks up the water very quickly causing a vacuum effect. That vacuum effect causes a cooling effect which is then used to cool whatever you want. The water/ammonia mixture is brought back to another chamber where the cycle starts again.
859798
when oil is burning it makes a lot of heat. This heat is used to transform water into steam (like when you prepare tea) this stream has much more volume than the water and so has a lot of pressure. This pressure goes via pipes to a turbine an makes it rotate quite fast. On the turbine's axis there is an electrical generator (a bit like the dynamo on an old bicycle) that produce the electricity.\n\nIn the end you have to get rid of the steam typically by cooling in down or sending it into the atmosphere.
375937
there are 2 ways:\n1. using a thermocouple u will generate a potential difference. but the thermocouple will not generate much current so the power will be small.\n2. this is a classical method. a steamengine coupled to a dynamo.
118833
a turbo will blow ur motor, get a cold air intake its pretty cheap and it will give u about 10-20 more horse
1124971
No. If you could, you'd have solved the energy crisis with your perpetual motion machine. The gas engine only provides 5hp so the most you can get out of it is 5hp. The engine is a 120hp so it will need 120hp to run at full power, so your generator will need to deliver at least 120hp. If this would work, you could feed the electric motor back to the generator and use 5hp to drive the generator and leave an excess of 115hp to use as you wish.\n\nIn Reality:\nElectric motors and generators are about 90% efficient.\nCombined cycle electricity generation as used in power stations from natural gas and fossil fuels can give overall 60-65% efficiency and this will probably be more efficient than your motor driving a generator.\n\nSo, you will theoretically get from the shaft of the electric motor 5hp(shaft power from IC engine) *90%(generator efficiency)*90%(motor efficiency) =4.05hp at effectively 80% efficiency.\n\nAlternatively, to run your electric motor at full power you would need an IC motor of 150hp to allow for the 80% efficiency of the generator-motor  combination.
520009
Another rule of thumb is to assume 100% load. \n\nNot knowing what kind of "electric motor calculations" you are going to make it is difficult to say what load factor you should use.