Turbines Definition and 84 Threads

Hi guys, I'm working on a machine which has a turbine which will spin through a container filled with water. I have to justify the design of the turbine and the blades surface. I looked up in some books referring to mixers designs such as (Unit Operations of Chemical Engineering by Warren L...

Whenever I see a wind farm, a huge proportion of the turbines just aren't going round. I don't mean in a flat calm, either. Why aren't the stationary ones doing their stuff? What were they put there for? I have a theory that politicians feel that they understand the wind (they are full of it...

Not sure if I've posted it on the correct thread but I don't think this classifies as advanced physics! I'm currently doing a physics assignment where we have to choose an energy source for a town in Australia (Broome). I am choosing to use a combined cycle gas turbine with natural gas as...

why do we need to have many sets of blades to utilize the gas pressure in reaction turbines properly? why not have just a set of comparatively wider blades?

Homework Statement Hey Guys, Steam enters a turbine with a velocity 120 m/s at 600°C and 600kPa. The steam leaves the turbine as saturated vapor at 200 kPa with a velocity of 180 m/s. heat is transferred from the turbine to the surroundings in the amount of 30 kJ for every kilogram of steam...

I'm doing a feasibility study on installing underwater electricity generating turbines. Being a civil engineering student, I don't know much of anything about the electrical engineering aspect of this. Now, these turbines are supposed to be near the bridge so most of the cables will be run along...

Homework Statement Consider a wind turbine farm that uses turbines with a blade span diameter of 80 m at a site subjected to wind speeds over the range of 4 to 32 m/s. Taking the overall efficiency of each turbine to be 25% and the air density to be 1.112 kg/m3, determine the electric power...

Why are Horizontal Axis Wind Turbines used more often than vertical axis when it looks like a vertical axis has more of an advantage? Please can you explain it simply?

What are the percentages of types of generators commonly used in wind turbines? To clarify, what percentage are regular squirrel-cage machines? What percentage are doubly-fed machines, permanent magnet machines, synchronous machines, and so on. I'm looking for a general idea of these statistics.

What is the effect of wind turbines on the aerodynamic of the wind system? Since energy is conserved, will excessive turbines lead to a leakage of wind energy and transformed into mechanical energy? [or concert to heat?] Also, what is the effect of the local pressure? Thanks in advance.

Hi, I am currently working on a year placement between my 2nd and 3rd years at university. I'm working at RWENpower in swindon, UK and goto Coventry University in the Midlands. I have a couple of questions about the industry and certain technical issues. 1. I am currently looking at...

As I live not far from Altamont Pass and often hike the wind energy area, I see the damage windmill blades do to birds by the number of dead ones on the ground. Also, these windmills are truly Star Wars ugly and insulting to the environment visually, not even considering what they do to birds...

Hello! I chose an aspect of a dynamical system exhibiting resonance to model. The focus of the project is on the resonant response of the system. If the wind has a frequency that matches the natural frequency of a turbine, then the turbine will resonate due to wind. I am working on modelling...

Hi fellows; we used the gas turbine from solar inc. A catterpillar company model centaur 4502 and 4702.i am resposible for the test cell where the gas turbines engine tests after over hauling.i face some problems.our engines are two shaft the power turbine direct couple with the dynmometer.the...

I did thermodynamics I and II 50 yrs. ago so help me out here. I note that high temperature and pressure steam is used in turbines and presumably the higher, the better the efficiency. My question is, is the temperature doing anything or is it only necessary to produce the high steam pressure...

Hello, I am Daniel from La Plata, Argentina and would like some help on a complex (for me) question. I am working with some friends on the development of an innovative wind turbine. We have built several prototypes with diameters of 0.5 m and 2 m. We have tested these prototypes on trucks with...

can someone explain in simple terms what does 1mw wind turbine mean? how many houses can this power? if it is a 500w turbine, how many houses can this power?

Wind turbines / hydroelectric turbines - I think the same fundamental Physics applies to my question. The fluid (water or air) prior to meeting the turbine has kinetic energy, after the turbine the flow must be the same (or there would be a 'build up' of fluid) - so it has the same KE as...

Hello, I have been trying to find recent developments for wind turbines (post 2000) but so far haven't been successful. Does anyone have any ideas as to any recent developments that have occurred (even if you arn't sure, just some ideas that I could research)? thank-you!

Im looking for information regarding wind turbines. A 1.5 megawatt turbine rotates at 20 rpm and requires 338 kiloNewton meters of force. A 100 kilowatt turbine rotates at 60 rpm and requires 19.4 kiloNewton meters of force. Both are gearbox driven generators. Is there a formula that is used...

I have few question about wind turbine and its theory for the situation, the average wind velocity is 2m/s 1. what kind of vertical wind turbine is the best for the design? helix, Darrieus, "S" shape? 2. for a wind turbine, how to increase it's output current? 3. what is the...

Steam turbines, maximum amount of work done? Hi, having a little trouble with this problem, not entierly sure what formula to use, or what value to use for Q. A steam turbine is operated ith an input temp of 800C and exhaust temp of 150C. What is the maximum amount of work the turbine can do...

I want to add a secondary battery bank to the hybrid and have that send a charge to the primary battery. I am considering 2 wind turbines mounted in the radiator inlets. I want to have the turbines charge a secondary battery that will feed to the primary battery. I am doing this to...

Dear All! I am in need of the follwing few questions regarding Gas Turbines and Compressors. It will be very nice and helpful if you people reply...an earliest reply will be appriciated why the flow channel in turbomachines usually does not have parallel hub and casing walls how the...

Dear All! I am in need of the follwing few questions regarding Gas Turbines and Compressors. It will be very nice and helpful if you people reply...an earliest reply will be appriciated why the flow channel in turbomachines usually does not have parallel hub and casing walls how the...

Hi everyone…. I’m trying to evaluate the feasibility of putting what is essentially a wind turbine inside a horizontal exhaust shaft. I have a feeling that this would affect the volume flow rate through the shaft, but am having difficulty proving it. I have found plenty of textbook examples...

http://www.quietrevolution.co.uk/ I understand these things can spin, but what I'm questioning is whether they can really produce enough power to even power themselves? I mean, there have got to be a few hundred if not thousand LEDs on each one, as well as a control circuit to control the...

Hello. I'm a HS junior at a research summer program and am researching Jet Engines. Apparently, when Jet Engines are used in tanks which move in deserts , the sand enters the turbines and corrodes them. In order to prevent that, would the solution be to implement a closed system so there is no...

Stories about bird kills caused by wind turbines are common. I really don't see why this is a problem. It seems to me that something fairly simple could be done; lights, sound, optical effects using colored paints...something. Does anyone know much about this?

I've heard a lot about Tesla turbines so I was wondering if there was a way to compress air using Tesla turbines. Can it be done?

The energy density usually given for hydrogen is 142 MJ/kg, by which comparison is made to how much hydrogen would have to be carried for it to be competitive with gasoline-fueled vehicles: Bottling the hydrogen genie. "One kilogram of hydrogen provides about the same chemical energy (142...

Lets talk (Wren) Turbines.. http://www.wren-turbines.com/specifi.htm How would you convert 81 Newtons Thrust output to power output in watts ??

So why exactly are wind turbines so expensive? I mean arent the generators alone $5-$10 million? One of my professors (hes just a physicist though) said he doesn't really understand why it costs so much either. The next week he brought up maybe there's sophisticated equipment making sure the...

1. Why Gas turbines are placed in open atmosphere while steam turbines under roof in Combined Cycle Power Plant? 2. What are the reasons for not using the reciprocating compressors with Gas turbines other than mass flow rate? Thanks in advance!