Turbine Definition and 545 Threads

(English is not my native language so I apologize for the rest of the post) Hi everyone! I'm an engineering student and I'm currently working on a solar thermal project. I'm trying to model a concentrating solar power (CSP) plant according to DNI (Direct Normal Incidence) change during a...

Homework Statement Consider a 210MW steam power plant that operates on a simple Rankine cycle. Steam enters the turbine at 10MPa and 500°C and is cooled in the condenser at a pressure of10kPa. The adiabatic efficiency of the turbine and pump is 85% (a) the quality of the steam at the turbine...

Hello I have designed a vertical axis wind turbine (Savonius) with a 180deg helical twist. It catches the wind really well but the wind power to electrical power conversion is really poor, it is currently only at 4% efficiency. I think the problem is the dc motor that I am using as a...

Hi! When my Hydroelectric station is not connected to a GRID (islanded mode) I control the frequency or the speed, and here are the equations for my turbine: http://oi46.tinypic.com/3127ixe.jpg Look the third equation. I built that in Matlab Simulink, and my out put is turbine speed...

Hi i am currently doing my dissertation in which i am designing a vertical axis wind turbine design that is a modification of that of a savonius design. A major problem that i am having is being able to predict the torque value of torque for my design in order for me to then predict the...

Homework Statement The Attempt at a Solution So pretty much for this question you want to find the actual work output of the turbine and the reversible work output. To find the reversible (theoretical) work output, you know that s2 = s1, so based on that information you can find what...

Hello, would someone know a real-life example value of the steam velocity at the turbine outlet? Also, an example mass flow (kg/s) at outlet? The typical pressure at outlet? If you know these for both high-pressure (HP) and low-pressure (LP) stage turbines, that would be great I have tried to...

Is this gas turbine engine compressor discharge air temperature calculation relatively accurate? Problem: Calculate the compressor discharge air temperature in ºF of the following gas turbine engine compressor core specifications. Gas Turbine Engine Compressor Core Specifications...

Suppose I've got a 6mw wind turbine with a very small wing span - 5 meters-, what would the minimum wind speed needed to activate the generator ?

I am a hobbyist and I have designed a radial turbine device for use in a tidal stream. I have conducted a couple of experiments to demonstrate that there is less mechanical stress in the radial approach as compared to the axial approach but I would like to prove this concept mathematically (at...

Is the difference between a water wheel and a water turbine the fact that a water wheel is used to power a mechanical system where as a water turbine is connected to a generator to produce electricity? I understand that you can get undershot and overshot water wheels but do these also apply to...

Homework Statement An ideal simple gas turbine has a compression ratio of 5. What is its Homework Equations c=r(γ-1/γ) η=1-(1/c) The Attempt at a Solution I'm stuck, I think I need to use the above equations and possibly more. I just don't know how to find a value for the ratio of...

Homework Statement Homework Equations mgh=1/2mv^2 The Attempt at a Solution 7.1) 200*1000=200000kg 7.2) Must I use mgh? They asked for kinetic energy but energy is conserved so: 200000*9.8*150 = 2.9*10^8 J 7.3) Ep=Ek 2.9*10^8=1/2*200000*v^2 v=53.8 m.s 7.4) 85% of 2.9*10^8 = 2.5*10^8 J...

Hello, I am trying to build a SIMULINK model in Matlab in order to determine the RPM of a wind turbine. Can someone please tell me how I can obtain the RPM of a wind turbine from the voltage fluctuations of a generator? Any good sites in the subject are also welcome. Thanks in advance.

Has anyone experienced with SST-9000 siemens steam turbine here? I am much astonished to see the steam parameter and the output. Main steam parameter- 290 Degree C/ 75 Bar Reheat steam parameter – 277 degree C / 9 Bar ST power Output is 1700MW. Can anyone explain, how is has been made...

This is a question that i am struggling to find any answer to on the internet. Doing some research for my 4th year honours dissertation. I have a wind turbine capable of producing a certain output at say windspeed of 10mph. Meaning that the wind is moving towards the turbine at 10mph...

Nice toy... :!) A recent offshore wind turbine. 6MW peak power, the rotor has 120m or 154m diameter :-p The alternator rotates at the blades' speed, without a gearbox... With D=6.5m, it uses permanent magnets, its stator must be actively cooled, and the nacelle weighs 200t. Still not my...

Can somebody explain to me why the temperature gets colder when expanding through a turbine versus expanding through a valve. Please explain with equations.

[b]1. Steam into a steam turbine at 7 MPa and 500 deg C. The turbine has an internal efficiency of 90 %. The steam exhausts at 20 kPa. 1) What is the exhaust enthalpy? 2) What is turbine work? 3) What is the quality of the exhaust steam? This is a question I got on a 2nd class boilers...

Hi Friends, Can someone help me find the Torque / RPM and HP from the following figures Turbine Blade Radius = 10 Meters Number of Blades = 3 Force on each blade = 351328 Newton Meters This is my working. Torque = 10539850 Newton Meters RPM = Cant Find ? If i assume RPM as 10...

Homework Statement A turbine generator is delivering a 20MW load at 50Hz, to a local load.; it is not connected to the grid. The load suddenly drops to 15 MW, and the governor starts to open the steam valve after 0.5s. Calculate the frequency to which the generated voltage rises, before the...

Hi, I am having a little trouble with how to go about calculating the axial loads being developed in a Wells Turbine. http://en.wikipedia.org/wiki/Wells_turbine I am looking at OWC's (Oscillating Water Columns) in particular The Wells Turbine is designed to rotate in the same direction...

Hey guys, sAn industrial process discharges 200,000 cubic ft/min of gaseous combustion products at 400 F and 1 atm. As shown in the figure, a proposed system for utilizing the combustion products combines a heat-recovery steam generator with a turbine. At steady state, heat transfer from the...

Homework Statement Hi all! I am been working on an EEI. Basically I recorded the power output (P=VI) of a wind turbine with the blades at different angles. I went from 0 degrees (flat) to 180 degrees in 15 degree increments. Averaging the data I see a graph like this: Also, just to...

Hello, everyone I would very much appreciate some help on this Intro to Thermo 2 problem if someone could give advice even a little would be helpful.1. Air (for this example, an ideal gas) is being used to produce work in a turbine and then is expanded to atmospheric pressure (101.2 kPa)...

I am attempting to size a wind turbine generator where the torque available is 8,000 Nm's. Can anyone save me doing the calculations? Regards AV8TUR.

Hello, Can some explain to me how to calculate the power coefficient of a vertical axis wind turbine. If you explain the steps invloved would be great or any external file location where I could refer. I have below information 1) Lift Coefficient. 2) Drag Coefficient. 3) Angle of...

Ok I have a design project that I am working on for the University this semester. Having a bit of problems trying to figure out and issue revolving around the wind force on our savonius blades. We are trying to make sure our blades will rotate with a wind speed of 10 mph. We have the blade total...

Gerotor style "turbine", or gasoline engine Hi, I have read a bit about gerotor style pumps. It seems to me that there is only two rotating, balanced parts. If water pressure can enter on one side, the water have no where else to go than through the gerotor before it can continue. The...

Hello, As wind speed rises, the power output of wind turbine also rises. However, after it reaches a certain value (rated power), it levels off, i.e., it doesn't increase any further. According to my teacher, there is a limit to the power generation capability of the generator and hence...

The fall semester just started and my team and I have to come up with a senior design project. Faculty projects and industry funded projects are very slim this year and it’s looking like our best bet will be to come up with (and fund) our own design. At this time I am torn between two ideas...

Hello, I am construction a floating wind turbine model which is going to be used in a wave tank experiment this fall. Currently I'm looking for a mooring line for this model. The line will go from the wind turbin down to the bassin floor, where it will go through a pulley and back up to...

Thank you Regards

Hi! I'm doing my master thesis about designing a offshore wind turbine tower for subarctic conditions and I have a major problem with units I'm not much familiarised with Ansys, so I use Ansa as preprocessor and launch the solve in Ansys The problem I have is in units. I'm using Ansys...

If we look at wind turbines used for power generation, they typically have 3 blades, and the blades are very slender compared to the blades of a house fan. I don't understand how such a slender blade can capture a significant amount of the wind's energy. The energy available in the wind is...

Hello everyone, Now i am trying to model wind turbine blade using solidworks. I have the airfoil coordinates at each section of the blade, but the coordinates are distance per chord (x/c,y/c) so i have to scale it using the calculated chord. When i scale it with respect to the origin -...

I recently saw the terms "Squealer Tips" and "Classified Weights" in a text about turbine blades in an article on the Pratt & Whitney PT6A turbo-prop engine. Can anyone explain what is meant by these two terms? What are they and what do they "do"?

Hi Guys, I have a model gas turbine that is driven by an ecu ... the ecu starter output is 12.6volts but the starter motor is rated to 6volts. The ECU can easily supply 20amps although the starter motor is rated to 5amps max efficiency. I need to drop the voltage from 12.6volts to...

Homework Statement I need to find how much energy will be produced (at least approximately) at a site with the following characteristics (this is taken from the German Renewable Energy law): “The reference site shall be a site determined by means of a Rayleigh distribution with a mean...

Gas turbine fuel/air ratio & cooling, help please! Hello Dear Colleagues, I am doing a gas turbine project and I wonder why we use cooling air instead of decreasing the fuel/air ratio after getting the following results from my gas turbine thermodynamic model. I have a mechanism in my model...

So I'm just a little confused with turbine work. Generally I've been solving it with first law -W = H2 - H1, so W = H1 - H2 = Cp(T1 - T2) But what about Q - W = U2 - U1? Can't that make it W = U1 - U2 = Cv(T1 - T2) giving a different answer. I have a feeling my understanding of...

I am doing research and was curioius as to how I would obtain useful numbers for efficiencies from the following information, concerning a CHP aero derivative turbine, Power KW = 43822 Heat Rate LHV KJ/kWH = 8980 From this, can I say that if I ran the machine for an hour I would use...

Centrifugal pump as turbine! Dear Friends, Francis turbine and centrifugal pump has got the same (reverse ofcourse) technologies rt. Have they both got the same manufacturing criterion? will centrifugal pumb, if used as a turbine, have the same efficiency as that of francis turbine?

An adiabatic turbine ,steam saturated vapour P1=1MPa P2= 100kPa. Mass flow rate is 10kgs-1 of steam. i need to work out how much power is produced help :(

Hi, I am having trouble calculating the efficiency of a water turbine. The turbine in question closely represents a cross flow water turbine. I have tested the power rating experimentally using a small DC motor and have found the output to be 400 mW. I now need to find the power...

Homework Statement air at a pressure of 30 bar and a temperature of 400 degrees expands through a turbine to a pressure of 0.2 bar. if the isentropic efficency is 80% determine the power developed for a mass flow rate of 300 KG/s Homework Equations Cv=0.715 KJ/Kg. K, Cp= 1.004 KJ/Kg.K...

Homework Statement a gas turbine is designed to produce 3000hp when using air at a maximum inlet temperature of 650k and assuming a heat loss of 70 kj/s. if the exhaust temperature is desired to be no greater than 200 degrees celsius, determine the mass flow rate of air required. Homework...

hey guys, i m new here, i m working at recovering waste heat from exhaust from an automobile using a heat exchanger and then turning a turbine using a working fluid such as steamor refrigerant but still mnot sure which turbine will be suitable for me to use considering the dimensions of the...

density=1.2041 kg/m^3 Power 1.65 MW Rotor radius (blade length) = 37m calculated swept area = 4,301 m^2 wind speed 12m/s the rotor speed range is upto 20rpm i want to calculate the torque but not quite sure how to go about it Thanks for any help!

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...