Wind Turbine Jet

Dynamic Analysis for Wind Turbine Jet: Force Due to Velocity of the Wind

2009-07-03T04:44:00.000-07:00

Wind Turbine Jet

At this moment, we try to do dynamic analysis for our wind turbine jet. Before we go through into the analysis, we must indentify first what are V1, V2, V3 and V4. The following symbols represent are:

V1 : Velocity of the wind away from the blades
V2 : Velocity of the wind just before the blades
V3 : Velocity of the wind just after the blades
V4 : Velocity of the wind away behind the blades

From the figure 1, we can assume that p1 = p4 and V2 =V3.

We also assume that between 1 and 2 and between 3 and 4 the flow is frictionless.

If you are more detail, you can ignore assumption and you can go to detail analysis. Generally between 1 and 2 and between 3 and 4 the flow are frictionless because of restriction in air is very small and we can neglect of their effect.

Therefore, we can apply Bernoulli equation.

From the substitution of equations above, finally we got the V2 equation such that.

We noticed that value of V2 is depending on V1 and V4. Absolutely in real life, we can only calculate value of V1 because of V4 value is depending on V1. So the conclusion is the higher output power generate by the wind turbine jet occur when the fast wind.

From the equation (2):

Next post: Output Power from Wind Turbine.

Wind Turbine Jet

Type of Application And Specification of The Wind Turbine

2009-05-28T08:34:00.000-07:00

Wind Turbine Jet

To develop a excellent wind turbine, first we must identify application and specification of our design.
Let say we are focus our mini wind turbine in order to provide a source of electrical energy in the small scale industrial sector as for the backup from the main national grid lines energy. For example, we found that the minimum power requirement for the industrial sector is fifty kilo-watts. Our mini wind turbine will also provide a constant electrical energy for the factory especially in the using of the huge mechanical machine as we know that the machine cannot lose the source of electrical energy even only in one second. It is easy for our wind turbine to be placed on the roof of the factory building itself, as long as the source of wind energy is in a good level. From our research in order to get the average wind speed in small scale industrial sector area, it is very clear that the average wind speed is 11.11m/s (estimation). Also, it is not a complicated for us to find a strategic location like a huge flat area to place our wind turbine because we had design the easiest ‘set up’ way to get the wind turbine ready in the work. In small scale industrial sector area, it is the hardest thing to find a vacant location to place the wind turbine as we know that place is full with buildings ~ easy to say, crowded. We do not need the huge crane to set up the wind turbine as for the most common three-blades wind turbine needs, because it is all come with an easy ‘piece’ set up wind turbine. There are common problem to build a wind turbine in the world.

The overall specification of our mini wind turbine:
1. Height of the tower:
2. Number of blades implemented: 14
3. Turbine size
• Length of the blades:
• Thickness of the blades:
• Diameter for the rotor:

Wind Turbine Jet

Wind Turbine Design and Layout

2009-05-05T00:45:00.001-07:00

Wind Turbine Jet

In order to extract energy from a larger area of the approaching wind, smaller, sturdier, and faster blades can be used. We try to design a new idea about the shape of fin, cowl, lobed mixer, rotor and stator. There are some of important parts in this new design of wind turbine jet.

The new design of our wind turbine can be smaller than conventional turbine but can generate more power. Based on the concept of the jet engine’s turbine, our wind turbine’s component can be divided into:

1. Rotor
2. Cowl
3. Lobed Mixer
4. Blades
5. Stator

Wind Turbine Jet

Modern Wind Turbine

2009-05-04T22:54:00.001-07:00

Wind Turbine Jet

The use of wind energy to generate electricity is now well accepted with a large industry manufacturing and installing thousands of Mega Watts of new capacity each year. Although there are exciting new developments, particularly in very large wind turbines, and many challenges remain, there is a considerable body of established knowledge concerning the science and technology of wind turbines. The overwhelming majority of wind turbines presently in use are horizontal-axis, land-based turbines connected to a large electricity network.

Wind turbines, wind systems, or wind machines are accepted terms for devices that extract power from the wind and produce mechanical or electrical power. The term wind turbine is often reserved for machines that use rotors as wind energy collectors.

Wind turbines are classified as horizontal-axis or vertical-axis turbines. Nearly all wind turbines manufactured today are horizontal-axis. Vertical-axis machines have been plagued with blade fatigue problems. In addition, the rotors on vertical-axis wind turbines are typically lower than those of horizontal-axis wind turbines. The latter positioning presents a disadvantage because the velocity of the wind decreases near the ground. Most horizontal wind turbines have two or three blades. The blades can be oriented upwind or downwind of the tower. Horizontal-axis wind turbines are actively or passively yawed to face the rotor into the wind.

Wind Turbine Jet

The History of the Wind Turbine

2009-05-04T22:42:00.000-07:00

Wind Turbine Jet

Humans have been developing wind turbines for more than 2000 years. According to D.J. De Renzo in his book Wind Power: Recent Developments, the first wind turbines were most likely simple vertical-axis mills used to grind grain in Persia around 200 B.C. By the 11th century A.D., windmills had spread throughout the Middle East, and by the 13th century, returning Crusaders introduced the technology to Europe. By the 14th century, the Dutch had the leading windmill technology. The Dutch used windmills extensively to drain the marshes and lakes of the Rhine River delta. In the 16th century, Holland began building wind-powered paper mills, oil mills, and sawmills. By the early 20th century, windmills were used extensively throughout the world to pump water in rural areas. This mode of water pumping is still important today for those in developing countries and for those living beyond the reach of power lines.

In the early 1980s, wind energy development in modern countries focused on generating electricity from centralized arrays of wind turbines called wind farms. The high oil prices resulting from the U.S. oil crises in the late 1970s made wind farms feasible. As a result, the U.S. wind industry grew at an unprecedented rate. However, at the end of that decade, the oil crises eased and U.S. tax exemptions expired, causing the wind turbine boom to subside. Recently, the wind industry has begun to boom again, and wind energy has become the fastest-growing energy source. In 1996, more than 25,000 wind turbines worldwide generated more than 7 terawatt-hours (TWh), or roughly 1% of the world’s annual electricity demand. By the year 2000, wind energy generation is expected to increase 60% to 11 TWh. New engineering technologies have decreased the installed price of wind energy from 35 cents per kilowatt-hour (kWh) in 1980 to less than 5 cents per kWh today. Although gas-fired turbines can produce electricity for roughly 2.5 cents per kWh, the future of wind energy remains bright. New manufacturing techniques, materials, and improved engineering technologies continue to decrease the cost of wind energy. In addition, large developing countries such as India and China have made commitments to renewable energy sources that hold great promise for the future of wind energy.

Wind Turbine Jet