what is the advantages and disadvantages of steam and gas turbo generator for 3MW el-power?
363006
Steam turbines obviously require steam, and therefore you will need a boiler, a condenser, and a water treatment facility. This could be fairly costly, but the steam turbine is a faily simple device, that runs very quietly. \n\nThe Gas turbine is very noisy, and wastes a lot of heat energy, there is a risk of explosion if not run properly, but a boiler carries the same risk. It may still be more efficient than the Steam Turbine. It requires scheduled cleaning of its air filter and its compressor blades, and will definelty need to be shut down for maintenence more often than the steam turbine.
458494
Are you referring to the Sterling Engine? Have you done a Patent search? Go to USPTO.gov\nSolar powered engines have been designed to work with the principle advantage of thermodynamics and or electrical generation. I really would not assume that your concept of solar power is inclusive of one or the other.
359567
The Gillette Fusion power has an auxilary fusion ball turbined power system allowing speeds of up to mach 4.\nThis is a revolutionary technology so be careful!
179256
Steam turbines have several controlled nozzles which connect to the superheated steam source from the boiler and superheater.  The number of nozzles and steam flow rate through the nozzles can control the power output of the turbine.  The momentum of the steam gas hitting the turbine (in stages) as it expands spins the turbine creating shaft power.\n\nOne type of gas turbine is the exhaust side of a turbocharger.  Hot exhaust gas under pressure is pumped by the engine into the the outer ring of the turbine.  The gas is still expanding, and spins the turbine providing shaft power to drive the air compressor side.  \n\nThe type of gas turbine common to power plants and airplanes has a compressor section, combustion chamber, and expansion section.  The expansion and compression turbine sections have moving vanes and stationary vanes to direct the gases and extract the most work possible from the setup.  Atmospheric air is compressed by the compressor and fed at elevated pressure to the combustion chamber where fuel is injected and an ingnition source keeps the flame lit.  The exhaust spins the expansion section and exits through the rear of the engine.
101238
well, the basic idea is that they're kind of like a big propeller inside a tube.  one side of the tube is connected to a sealed tank with some water in it, and the other side of the tube is vented out to the air.  when you light a fire under the water, the water boils and releases steam.  this fire can be powered by coal, oil, or even not be fire at all - in a nuclear reactor, the nuclear reaction is used to heat water that in turn boils and makes steam.\n\nif you've ever done any cooking on the stove, you know that if the container is sealed, the steam can build up to a VERY high pressure.  \n\nif you then open a valve and send the steam down the tube toward the turbine, the high pressure on one side will cause the turbine blades to spin.  just like a propellor working in reverse, essentially.  obviously i'm glossing over some of the details - there are a lot of subtle thermodynamics involved with a real turbine, and "propellor" is only a very rough approximation.\n\nso the shaft of the propeller is then connected via some gearbox to a generator.  a generator is basically a loop of wire that is free to turn in a magnetic field.  usually this field is generated by a permanent magnet.  \n\nif the loop spins, the mechanical energy of the spin is converted into electrical energy via a phenomenon called magnetic induction.  if you then connect the wires of the loop to some circuit, the induced current will power the circuit.\n\nan old roommate of mine was into collecting miniatures steam engines, for some reason, and apparently there are quite a few companies that make them.  here is a representative example of one or you can search on google for "steam turbine toy" or "steam turbine kit":\n\nhttp://www.lilliputmotorcompany.com/steam-turbine-wilesco-p-451.html\n\nas for a generator, lots of science hobby places sell little kit generators.  you don't want to use a big one as your tiny steam engine won't have enough torque to turn one over.  here's an example:\n\nhttp://sciencekit.com/category.asp_Q_c_E_440210\n\nhere are some links about how steam turbines work, and magnetic induction and generators:\nhttp://library.thinkquest.org/C006011/english/sites/dampfturbine.php3?v=2\nhttp://www.sciencejoywagon.com/physicszone/lesson/otherpub/wfendt/generatorengl.htm\nhttp://www.taftan.com/thermodynamics/STURBINE.HTM
748326
The fuel should increase to take the load. My experience is on turbine generators, one was 9 mega. WATS.
906536
These are a published value.  The actual voltages vary as you can see from this quote from a power plant site \n\n"POWER PLANT CAPABILITY: The two hydroelectric power generators boast a generating capacity of 92,000 kilowatts. The estimated annual energy output is 205 million kilowatt-hours."\n\nAnd none of the values quoted are a multiple of 11.  It appears that the source your using just happened to have values that were multiples of 11.\n\nA quick look on Google listed quite a number of plants that produced values that had 13800kv to 205 million kv.\n\nChance that the ones you looked at were multiples.\n\nBest of luck in your project.
1077557
82 kVp with 25mAs  (3 pulse or better generator) and GOOD positioning
839893
"turbo" used in normal piston driven engines uses the exhaust gasses energy to drive a (typically) radial turbine that is connected to a compressor that compresses the intake air. \n\nThe increased amount of air (mainly the oxigen in interesting) allows to add more fule to the mix and create a larger explosion in the cilinder yielding more power.\n\nThe air can optionally be cooled using an "intercooler" (air-to-air heat exchanger)\n\nFor diesel powered engines the result is an increase in power of the engine and an improvement of the fuel economy. For gasoline powered engines the results are an increased power, but the fuel economy might go either way.
405671
I assume you mean electrolysis?  I don't know the exact ratio of energy out to energy in, but I do know that it's not very efficient.  There will be a lot of lost energy.  What kind of H2 on demand system?  Are you trying to run an automobile?  If so, you'd need more than about 10 kilowatts of electricity.  Might as well just build an electric car if you have that much electricity to waste.
903919
Generator sizing becomes more difficult when electric motors are involved, due to their large starting demand.  Typically, there are two motor styles: CODE G requires 3 times running watts to start, and CODE L requires 5 to 6 times running watts to start.\n\nIt is not practical to think that all loads will start at the same time.  Nor is it practical to size a generator using all starting watts for all selected motors, as some motor loads will already be running (or OFF), when others are ready to start.  As you can see, it can be difficult to exactly size a generator for a group of specific loads, as they are constantly changing in their "ON" or "OFF" cycle.  Always try to limit your load selections to the bare essential items.\n\nTO FIND:\n1 PHASE KW = V * A * PF / 1000\n3 PHASE KW = V * A * 1.73 * 0.8 / 1000\n1 PHASE KVA = V * A * 1000\n3 PHASE KVA = V * A * 1.73 / 1000\nMOTOR - REQD 1 PHASE KW = ( MOTOR HP) * (EFF)\nMOTOR - REQD 3 PHASE KW = (HP) * (0.746) * (EFF)\nMOTOR - REQD 1 PHASE KVA = (MOTOR HP) * (EFF) * (0.8)\nMOTOR - REQD 3 PHASE KVA = (HP) * (0.746) * (EFF) * (0.8)\n1 PHASE PF = 3 PHASE PF = KW / KVA\n1 PHASE AMPS = (KW * 1000) / (VOLTS * PF) =  KVA * 1000 / VOLTS\n3 PHASE AMPS = (KW * 1000) / (1.73 * VOLTS * PF) = (KVA * 1000) / (1.73 * VOLTS)\n \nREQUIRED PRIME MOVER (ENGINE) HORSE POWER\n KW / (GENERATOR EFF. X .746)\n \nFREQUENCY (HERTZ)\n NUMBER OF POLES X R.P.M / 120\n \n ~ ~\nEXAMPLES IN GENERATOR SIZING FOR LARGE ELECTRIC MOTORS \n\nAll AC electric motors require large amounts of electric power to start up, due to it's starting winding. After approximately 3/4 - 1-1/2 seconds, the starting winding drops out, and the running winding continues, at a much lower power demand.  A generator must be sized to handle the load of the starting winding.\n\nSizing a generator for three phase motor starting LRA : \nThe formula is: Motor HP x KVA per HP x (1000 / (Volts x 1.73)) = LRA. \nGiven the size of your machines, estimate KVA/HP at approximately 6.\nTherefore, for 11 kW ... LRA = 134.6 = 135 amps. Generator must produce this current at 380 V, so (1.73 * V * A * 0.8 / 1000) = KW = 71.\nSimilarly, for 15 kW .... LRA = 184 A and KW = 97.\n\nBOTH SINGLE PHASE AND THREE PHASE MOTOR SIZING EXAMPLES ARE BASED ON INFORMATION IN NATIONAL ELECTRICAL CODE HANDBOOK, ARTICLE 430.7 AND IS INTENDED FOR MAXIMUM VOLTAGE DIP OF 25% UPON INITIAL MOTOR START-UP.  IF 35% VOLTAGE DIP IS ALLOWABLE, REDUCE LRA, THEREFORE KW SIZE, BY 25% (LRA or KW X .75). IT IS NOT RECOMMENDED TO CHOOSE ANY GENERATOR KW SIZING THAT YIELDS MORE THAN 35% VOLTAGE DIP.\n\nStarting more than one motor, at one time: make a list of all motors, totaling all running watts.  Calculate the starting demand when the largest motor is started while all others are running.  Add the largest motor starting watts, to the running watts of all smaller motors already running.
1184657
Modern wind turbines can operate at efficiencies up to about 44% while the theoretical maximum efficiency is about 56%.  Tower height is very important and for a three-bladed system, increasing blade diameter increases power exponentially.  The wind is free but designs are optimized to increase efficiency to produce maximum energy for the installation cost.
1065081
high torque compared to single phase. For the same power output the size of three phase motor will be smaller and also it will be less costly.
805978
Not sure what three things you're looking for, but here are three good ones:\n1. lots of windings\n2. high current\n3. an iron core
115248
steam has more energy in it. steam is derived from heating water up, so steam will contains much more energy and thus translate to a more powerful turbine .
515576
See at: http://en.wikipedia.org/wiki/Newcomen_steam_engine
267048
I am a sales rep in the Midwest.  I cover both types of plants and sell equipment to each.  There is zero activity in gas turbine plants right now due to the high gas prices.  Utilities in our area are building new coal burning capacity and trying desperately not to fire their gas turbines.  This could change at any time, but I see clean coal technologies and renewables   taking the lead.