Turbine Definition and 546 Threads

please excuse the writing in some of these messages as I am typing this from my phone, but I am looking to build a high output wind turbine. I have a few questions. I am a high-school senior and have a large understanding in physics. my idea involves a 12 wing rotor as wind speeds are low in...

I am building a "Tiny Home" on an old camper travel trailer. I am using all recycled materials and any leftover building supplies I can find. I am going to use solar power to generate most of my electric power (lights, outlets, etc.). I am considering using a hybrid system and utilizing wind...

We need to design an archimedes screw turbines to power a pump of 80 watts. Any tips to design this? I have tried a way, but I think it's very wrong. Thanks in advance :)

Guys, I was reading about Turbofan and somewhere while browsing Defence Turbofan engines I came across Booster stages, but I didn't find any description or what are booster stages in Gas Turbine (Axial Compressor)

Hello, I`m working on a mathematical model of a gas turbine and I need good compressor maps, especially function of efficiency vs. pressure ratio, inlet temperature, mass flow etc I`ve been looking for this for few days, but can`t find anything interesting. Do you know where I can...

I have read some of the responses to the question of why a wind turbine would not be a useful source of energy for a car. Why could it not be used as a supplemental source to extend travel?

Can anyone tell me how to determine the power produced by cycle dynamo? Let's say I am doing the project which use the water vortex force to push the turbine and above of the rotation shaft connected to the dynamo. So that i can determine the rpm, how could i calculate the power ? Any...

Homework Statement Homework Equations P = 0.3*rho*A*V^3 F = 0.44*rho*A*V^2 From what I know that may help: Shear Stress (Torsion) = T*radius/(Moment of Inertia) The Attempt at a Solution When we were given this problem no one in the class had the slightest clue how to...

Dear All, I'm in a bit of a pickle. I have recently booked out the local wind tunnel in order to run some simulations on three home made model wind turbines. I am aware of how to theoretically calculate the available power (0.5*p*A*V^3) and that P=Tw (Torque * Angular Velocity). Angular...

It is a puzzle to see so many of the wind turbines that are idle. Even in active wind farms, such as at Altamount Pass, it is usual to see at least 20% of the turbines idle. Older installations are usually idle as well. Why is this? Hydraulic turbines routinely run flawlessly for decades...

This is my first time posting in this forum so please have patience. I am working on a small wind turbine design that will output 6-22 kWh (30kWh would be ideal but is not very plausible) and will be used to charge a lithium ion battery. The turbine will be used with wind speeds of 35-80 mph...

I'm no physicist, or grammar specialist so please go easy on me for my first posting here. I've been seeing a lot about wind turbines and hydro turbines. But I had an idea that I thought would be very obvious yet I can't find a topic on it when doing a quick search. And that is this; what would...

Homework Statement A gas turbine power plant operates on the regenerative Brayton cycle as shown in the figure. Compression occurs in two stages, with interstage cooling, and expansion in the turbine likewise occurs in two stages, with interstage reheating. The cycle operates between the...

Hello, a friend of mine has a "revolutionary" idea about harvesting wind power by using a "translational turbine". however, it all sounds silly to me. this is what it should look like: is this a good idea for a wind "turbine"?

I am making a small wind turbine using a generator to charge a battery. I have chosen a generator in relation to the battery and ultimate output requirements of the LEDs. However - I need to determine the amount of power I need to put generate for the system to work effectively. The...

Homework Statement Hi I need help in calculating the forces on a domestic wind turbine that is retracted/extended by a hydraulic ram. It is very simular to the following photo: I need to calculate the forces at the hinge and where the ram attaches. I have all the relevant dimensions and...

can anyone help how to build small wind turbine system to generate 2KW power using MATlab simulink..??

Hello everyone, I've found these forums extremely helpful in the past and I've decided to create an account in order to answer a question that has been going in my mind and I can't seem to find the answer. The power a wind turbine can generate can be derived from the equation: Power =...

I understand that in theory one can adjust the blade pitch or the speed or the yaw to control a wind turbine. Every time I do a search on turbine control this is all I come across. However I want to ask the question at a more "actual" level. What actually happens. Do they use PI control...

Homework Statement The speed of a radial-flow reaction water turbine operating under BEP conditions is 1200 rpm. The diameter of the turbine runner is 0.25 m, the inlet angle and width of the runner vanes are 125° and 70mm respectively, and the inlet guide-vane anle is 25°. The hydraulic and...

having a problem here: If a hydro turbine is rated 1 MW @ q=5m3/s with 25 m total head does that mean that the water once through the turbine will also be q=5m3/s? Let's assume that we have ideal maximum conditions including the most efficient nozzles. I have seen some examples where the...

hi. always wondered how water in a condenser is returned to the boiler. wouldnt it need to be pumped in with a high pressure pump?

We all know the constant volume combustion engine acts as a kind of internal combustion engine that is used in the car and truck extremely widely. The cycle is called Otto cycle. I also heard the constant volume combustion gas turbine engine was proposed many years ago and developed a few ones...

Hi I need to perform a material selection case on the rotor of a steam turbine. Both material selection as process selection have to be made. Since my background is rather chemical than mechanical or material engineering I've encountered some difficulties. I hope you can help me with them. For...

Hello, I was watching national geographic from 1 or 2 weeks, and they illustrated a way to produce electrical energy from surf. I will try to explain the principle: 1- They brought a cylinder, and attached to it a turbine which is designed to rotate in only one direction independent of the...

I am trying to find authority that the gap between the turbine wheel and the housing is important to the performance the turbocharger will be able to add to a diesel engine.

i don't know if i am in right part of forum. i want to build some sort of wind turbine for a school project. all the diy project are 6 or 9 coils with 8 or 12 magnets. the coils are on non magnetic board and the magnets on steel plate. why on steel, the steel plate increase the total...

Homework Statement The problem (tried my best to translate it): A small high speed turbine is operating on compressed air. It deliveres dW/dT=100 W. At the inlet, the pressure is 400 kPa and the temperature 50*C. At the exit, the pressure is 150 kPa and the temperature -30*C. Neglect...

The problem (tried my best to translate it): A small high speed turbine is operating on compressed air. It deliveres dW/dT=100 W. At the inlet, the pressure is 400 kPa and the temperature 50*C. At the exit, the pressure is 150 kPa and the temperature -30*C. Neglect the velocity and assume an...

Hello All, I'm currently in the process of designing a numerical model for a vertical axis wind turbine, more specifically, a straight blade giromill. I'm currently having trouble because depending on the variables I choose, I can produce more power than available from the wind. My...

Belts and pulleys for WIND TURBINE ? Hi, I have been working on a Vertical Axis Wind Turbine. The blades I am able to fabricate produce more torque than speed. I am adding a synchronous belt drive transmission. The current configuration is 1 rpm at the input and 7 rpm at the output. I have...

why convergent rather than divergent? is this to maintain the constant air velocity. Can someone explain this better to me. Would be helpfull

Hi I have been trying to figure out the force experienced by individual components of a gas turbine engine. Generally, the thrust of the engine is defined / calculated as the change in the momentum of the fluid. Usual formula is mass flow X (C_jet - C_intake) + the pressure difference in...

I want to find out the power required to run the turbine and the pressure of steam required to maintain the power requirement of turbine. Please tell me about any formula or method to resolve this issue.

In order to test the performance of a specific engine, is it necessary to find a design point? If so could anyone tell me how to find the design point for gas turbine engine and suggest any useful materials that gives good information about Design point performance. Thank you!

use of wind powered turbine in cars ?? helloo.. I'm just thinking to build an wind turbine powered car using with electric motor like an hybrid car .. there are certain question arises in my mind are .. that the use of turbine as a source of energy will be efficient or just theoritical concept...

Let's say I had a turbine in water, and I wanted to turn it based on hydrogen bubbling up from the water via electrolysis, how would I calculate the power gained from the flow of hydrogen/oxygen gases through it in a medium of water? I can calculate the buoyancy of these gases in water fine...

Hi guys, Currently doing a Final Year Project on a gas turbine and steam turbine energy plant combinate, and was wondering if anyone knows where i could find some data on a specific gas turbine with all pressures, temperatures and efficiencies? just so i can verify my calculated results Thanks

Homework Statement I have attached the question. I'm not really sure how to do this one Homework Equations power = work done/time The Attempt at a Solution Is the turbine efficiency simply the power generation (750kW) divided by the mechanical output (800kW) which is so 750/800 x...

I'm building a yaw control system for one of the universitys VAWT turbines. I need to design a slewing bearing which can reliably support radial, axial and tilting moments. I have absolutely no idea how to do this or even where to start. Could you please give me some advice as to go about...

I was reading an earlier post about having a wind turbine embedded in a vehicle to generate electricity as it moved. I came to this site after having this thought last night. But I realized immediately that drag and weight would be counterproductive. However, I did ponder an alternative...

Ok here's an idea that isn't a perpetual motion machine (it's no more perpetual than solar cells): Using a big magnifying lens or parabolic mirrors, what are the formulas when either of them are used to evaporate water into water vapor steam to move a turbine to power an electric generator?

Hi: I’ve been trying to figure out how does the spinning action of the turbine blades in the video produce a vacuum so as to draw air down the shaft? I don’t see any venturi effect taking place. A bit puzzling on how this gadget works?:confused...

What does happen to the wind after it passes through a wind turbine blade? Does it increases the wind speed?

Homework Statement A steam driven turbine generates 200 MW of mechanical power at tan eficiency of 32%. The temperature of the steam at the input is 500 C, and at the output it is 200C a: How much power is input as heat to run this turbine? b: How much power is lost in hear to the...

Hi everyone! I am new in physics forum and this is my first post. I need help from the people out there. I wanted to deisgn a Vertical Axis wind turbine to produce 5k Watt output with a frequecy of 50Hz, 220VAC, to completely run my home appliance 24 hours. Appliances include: -1.5ton...

Hello, i would like to do structural analysis for low pressure spindle blades in Ansys apdl.. but i couldn't do it coz of lack of knowledge about it.. Can anybody explain me where to apply force/ pressure and constraints and how to do it to find stress, strain and deformation in it.. please i...

When I have a certain head (H) of water, this fixes the jet velocity of water as V = sqrt(2gH). And for maximum energy transfer, turbine bucket velocity should equal, V(b) = V/2. Now, I am confused at how do you determine the Turbine diameter and no. of Poles to be used in the generator. I...

hey! Wind turbines have got certain threshold speed of wind (of about 6-7 m/s) which acts as a mechanical resistance to its rotation. Is this mechanical resistance a result of frictional resistance in bearings alone, or it is also a result of its own weight? If yes, approximately how much...

I recently read this http://www.earthtechling.com/2011/06/wind-turbines-board-europe-ferries/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Earthtechling+%28EarthTechling%29&utm_content=Google+Reader" and it's really bugging me. They claim that by putting wind turbines on the...