Uses Of Wind Energy Pdf

Sharon asks…

name of energy by the vibration of waves?

Windmill Farms answers:

The energy from the flow of water is usually called ‘wave power’ or ‘tidal power’ and has been used here in Britain since Roman times. A recent archaeological dig along the River Thames revealed the remains of a ‘tide mill’.


Tide mill technology slowly advanced over the years, not just here in London but also in Paris. The tide mills of Paris are of particular interest, since they were floating versions which ground grain into flower which was then used to bake bread in the city for the people to buy.


In truth, floating tide mills were common right across Europe, but not here in London, as far as we know.


Remains of an 800 year old London tide mill found.


Here in London there is a famous tide mill near the London [2012] Olympic site.

The River Lee 18thC tide mill

The River Lee tide mill is believed to have worked for up to 16 hours per day non-stop. The River Thames has a tidal race of about 8 knots (about 10 miles per hour) and the mill would have taken advantage of both tidal flows in and out of the river.

Tide mills are far more efficient than wind power because as we know, sometimes there is hardly any wind, but the tides continue to flow in and out no matter what.

The most famous surviving windmill here in London is the Brixton windmill, built in 1816.


The Brixton Windmill and Gardens, is now used as a venue for popular musical events.


Mary asks…

how is chemistry connected/related to energy and power?

Windmill Farms answers:

How Wind Turbines Work The terms wind energy or wind power describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity. Take a look inside a wind turbine to see the various parts. View the wind turbine animation to see how a wind turbine works
How does a Wind Turbine Work? The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity, How does a Wind Turbine Work? Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity, animation
How to calculate wind power P = 0.5 x rho x A x Cp x V3 x Ng x Nb, Cp = Coefficient of performance (.59 {Betz limit} is the maximum thoretically possible, efficiency), Ng = generator efficiency, rho = air density 1.225 kg/m3, Nb = gearbox/bearings efficiency ~1
Investigations on current mills and wind turbines Theory of energy conversion Betz’ theoryairfoil theory –lift and dragvertical axis free stream turbinesvertical vs. Horizontal axisdrag vs. Lift based designsanalytical modell for lift based design –problemspitch-variable design –use of dragcomputational, pdf file
Power available in the wind
EK=m.v2/2 ; Pw=r.A.v3/2 ==> r=airdensity=1.25kg/m3; v=windspeed; A = rotor swept area; 4 Beaufort (light breeze)=21-30km/h ; Ptot=hW.hG.r.A.v3/2 ==> hG=generator efficiency; hW=windmill efficiency; Pm mechanical power (Watts) = 0.593 Pw available wind power (the Betz coefficient: max efficiency for propeller type windmills)
Weather Conversion Calculators Distance Conversion Calculator, Speed Conversion Calculator, Pressure Conversion Calculator, Weight Conversion Calculator, Volume Conversion Calculator, Wind Chill Calculator, Surface – Cross / Head / Tail Wind Calculator, Flight Level – Cross / Head / Tail Wind Calculator, Temperature Calculator, Relative Humidity Calculator, Heat Stress Index Calculator, Fighter Index of Thermal Stress, Height and Temperature D-Val Calculator, Pressure Altitude Calculator, Density / Pressure Altitude Calculator

Susan asks…

Can i use this motor for a wind turbine generator?

I would like to use this motor for my wind turbine im building but have no idea what type of motor it is. Im new to this so im clueless. The motor is off an old sump pump i can’t use anymore as the case has cracked but still runs good.
Its a davey sumppump dv15va-1
phase 1
0.15 kw
He is a picture of it and other info on the website

I would like to know what type of motor it is e.g. DC AC PMA
Any info would be helpful thanks in advance.


Windmill Farms answers:

Hey Jason, it is very unlikely you’ll be able to use that motor to produce electricity from a wind turbine, or any mechanical source. It is AC, not DC, not PMA, and is most likely brushless. Since it is single phase, it will also have a starting circuit included, which further complicates the matter. That motor might make a good fan, with its RPM rating, and fairly low torque and energy use, but you won’t even be able to power a flashlight from it no matter how fast you spin it. It’s like walking around a junk yard with a cylinder in your hand asking if you can use it to run a lawnmower. A good wind turbine starts with aerodynamic design, rotation rates and torque values, not the motor looking for a propeller.

We’ve built a few devices like this, one of my favorite motors to use as a generator for a wind turbine, or anything, is the electric scooter motor. They are small, lightweight, DC permanent magnet, have ball bearings so very little start up torque, and don’t cost much. I built a small electric cart for the kids with a 250 watt 24 volt one that goes about 12 mph, but when you coast down a good steep hill much faster than that then hit the button, it makes a good battery charger from the wheel rotation, so it should work well in a wind turbine application as well. I’ll include a good link to buy them below. If you get one, make sure you are up a notch on voltage. If you are trying to charge 12 volt batteries, get a 24 volt motor. For 24 volt batteries, go for 36 or 48 volt motors, and so on. Once you start spinning the motor, and the rpm is enough for the motor voltage to exceed the battery voltage, then the battery will absorb any excess voltage and turn it into amperage, which is what you want to have happen. Turning the motor faster will not raise the voltage, but increase both the torque the motor is extracting from the turbine, and amps being delivered to the battery. Make sure you put a large diode in the line from the motor to the battery, or the battery will turn the propeller on the turbine when the wind dies down and drain the battery again.

I checked the Davey website for specs on you unit, I could only find the D15, not the DV, but it is probably an older, or newer model of the same unit. That link is below as well. Good luck Jason, and take care. Rudydoo

Richard asks…

What is the Victorian Energy Efficient Certificate and how does it work?

There is a company offering to exchange and install certain light globes for more efficient ones without charge. A certificate detailing this action is then created. In exchange the householder assigns their rights under this certificate to the installing company which can sell the rights to an energy service. Have others used this service, and what are the implications?

Windmill Farms answers:

[PDF] Renewable Energy & Energy Efficiency Certificate Trading: the …File Format: PDF/Adobe Acrobat – View as HTML
1 Apr 2009 … The National Electricity Market works well. – The Tradeable Renewable Energy Certificate Scheme has worked well for low-cost RE: wind, … – Similar pages -

Energy use by sector – Sustainability VictoriaInformation about energy use by sector in Victoria. – Cached – Similar pages -

Energy use in Victoria – Sustainability Victoria7 Nov 2008 … A key challenge for Victoria is the significant growth in the demand for energy. Our energy consumption has doubled since 1973. … – Cached – Similar pages -

[PDF] Modeling Renewable Energy Certificate PricesFile Format: PDF/Adobe Acrobat – View as HTML
23 Apr 2007 … The Victorian Mandatory Renewable Energy Target (VRET) …. Works reasonably well in terms of project selection (picks the right sort of … – Similar pages -
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Nancy asks…

How does energy from a wind turbine get into your home?

As in, How is it connected to your house? Is it connected to power lines or what?

Windmill Farms answers:

You can get a small scale wind turbine that will generate 400 Watts or more of voltage which can power a house if you wanted but every wind turbine has a step up or step down transformer which places the voltage directly to a load or source ( your house or a factory or to the grid). House holds in the US run on 120 volts AC and 20 amps of current. When a wind turbine ( a small one) is generating 400 volts or more a “step down” transformer is used to reduce that into 120 volt ac, 20 amp at 60 hz for household use. Check this out and you can see the difference and of large to small turbines, how much voltage they produce along with how the voltage generated can be directed to a house of a facility or onto the grid for widespread use.


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