Share this post by: Sharai Hoekema February 18 In a much needed re-invention of wind turbines, Vortex Bladeless Wind Turbine has introduced a concept that has definitely made waves in the energy industry. Its unique bladeless turbine concept has been hailed as a technological leap forward and a resolution in the generation of wind power How The Bladeless Wind Turbine Works The Vortex bladeless wind turbine will not only make wind power simpler and more effective, it will also ultimately be more environmentally friendly. The Vortex wind turbine: bladeless windpower generator. It is a way of generating energy using a vorticity phenomenon called Vortex Shedding. This basic principle uses cylindrical turbines, which will allow for the development of a spinning whirlpool or vortex when wind passes through it.
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Description[ edit ] The guiding idea for developing Tesla turbine is the fact that in order to attain the highest efficiency, the changes in the velocity and direction of movement of fluid should be as gradual as possible. A Tesla turbine consists of a set of smooth disks, with nozzles applying a moving fluid to the edge of the disk. The fluid drags on the disk by means of viscosity and the adhesion of the surface layer of the fluid.
As the fluid slows and adds energy to the disks, it spirals into the center exhaust. Since the rotor has no projections, it is very sturdy. Tesla wrote: "This turbine is an efficient self-starting prime mover which may be operated as a steam or mixed fluid turbine at will, without changes in construction and is on this account very convenient. Minor departures from the turbine, as may be dictated by the circumstances in each case, will obviously suggest themselves but if it is carried out on these general lines it will be found highly profitable to the owners of the steam plant while permitting the use of their old installation.
However, the best economic results in the development of power from steam by the Tesla turbine will be obtained in plants especially adapted for the purpose. In this configuration a motor is attached to the shaft. The fluid enters near the center, is given energy by the disks, then exits at the periphery. It uses the boundary-layer effect on the disc blades. Smooth rotor disks were originally proposed, but these gave poor starting torque.
As of , the Tesla turbine has not seen widespread commercial use since its invention. The Tesla pump, however, has been commercially available since  and is used to pump fluids that are abrasive, viscous, shear sensitive, contain solids, or are otherwise difficult to handle with other pumps. Tesla himself did not procure a large contract for production. The main drawback in his time, as mentioned, was the poor knowledge of materials characteristics and behaviors at high temperatures.
The best metallurgy of the day could not prevent the turbine disks from moving and warping unacceptably during operation. This invention utilizes a combination of the concepts of a smooth runner surface for working fluid frictional contact and that of blades projecting axially from plural transverse runner faces. The issue of the warping of the discs has been partially solved using new materials such as carbon fiber.
One proposed current application for the device is a waste pump , in factories and mills where normal vane -type turbine pumps typically get blocked. Applications of the Tesla turbine as a multiple-disk centrifugal blood pump have yielded promising results due to the low peak shear force. Patent 7,, was issued to Howard Fuller for a wind turbine based on the Tesla design.
Please add a reason or a talk parameter to this template to explain the issue with the section. WikiProject Technology may be able to help recruit an expert. At the time of introduction, modern ship turbines were massive and included dozens, or even hundreds of stages of turbines, yet produced extremely low efficiency due to their low speed. For example, the turbine on the Titanic weighed over tons, ran at just rpm, and used steam at a pressure of only 6 PSI. This limited it to harvesting waste steam from the main power plants, a pair of reciprocating steam engines.
Eventually axial turbines were given gearing to allow them to operate at higher speeds, but efficiency of axial turbines remained very low in comparison to the Tesla Turbine. As time went on, competing Axial turbines became dramatically more efficient and powerful, a second stage of reduction gears was introduced in most cutting edge U. The improvement in steam technology gave the U.
Navy aircraft carriers a clear advantage in speed over both Allied and enemy aircraft carriers, and so the proven axial steam turbines became the preferred form of propulsion until the oil embargo took place.
The oil crisis drove the majority of new civilian vessels to turn to diesel engines. However, in testing against more modern engines, the Tesla Turbine had expansion efficiencies far below contemporary steam turbines and far below contemporary reciprocating steam engines. It does suffer from other problems such as shear losses and flow restrictions, but this is partially offset by the relatively massive reduction in weight and volume.
The disks need to be as thin as possible at the edges in order not to introduce turbulence as the fluid leaves the disks. This translates to needing to increase the number of disks as the flow rate increases. Maximum efficiency comes in this system when the inter-disk spacing approximates the thickness of the boundary layer, and since boundary layer thickness is dependent on viscosity and pressure, the claim that a single design can be used efficiently for a variety of fuels and fluids is incorrect.
A Tesla turbine differs from a conventional turbine only in the mechanism used for transferring energy to the shaft. Various analyses demonstrate the flow rate between the disks must be kept relatively low to maintain efficiency.
Reportedly, the efficiency of the Tesla turbine drops with increased load. Under light load, the spiral taken by the fluid moving from the intake to the exhaust is a tight spiral, undergoing many rotations.
Under load, the number of rotations drops and the spiral becomes progressively shorter. Efficiency is a function of power output. A moderate load makes for high efficiency. Too heavy a load increases the slip in the turbine and lowers the efficiency; with too light a load, little power is delivered to the output, which also decreases efficiency to zero at idle. This behavior is not exclusive to Tesla turbines. The turbine efficiency of the gas Tesla turbine is estimated to be above 60, reaching a maximum of 95 percent[ citation needed ].
Keep in mind that turbine efficiency is different from the cycle efficiency of the engine using the turbine. Tesla claimed that a steam version of his device would achieve around 95 percent efficiency. The thermodynamic efficiency is a measure of how well it performs compared to an isentropic case. Turbine efficiency is defined as the ratio of the ideal change in enthalpy to the real enthalpy for the same change in pressure. In his final work with the Tesla turbine and published just prior to his retirement, Rice conducted a bulk-parameter analysis of model laminar flow in multiple disk turbines.
A very high claim for rotor efficiency as opposed to overall device efficiency for this design was published in titled "Tesla Turbomachinery". However, in order to attain high rotor efficiency, the flowrate number must be made small which means high rotor efficiency is achieved at the expense of using a large number of disks and hence a physically larger rotor.
For each value of flow rate number there is an optimum value of Reynolds number for maximum efficiency. With common fluids, the required disk spacing is dismally small causing [rotors using] laminar flow to tend to be large and heavy for a prescribed throughflow rate. Extensive investigations have been made of Tesla-type liquid pumps using laminar-flow rotors.
It was found that overall pump efficiency was low even when rotor efficiency was high because of the losses occurring at the rotor entrance and exit earlier mentioned. June Learn how and when to remove this template message In the pump, the radial or static pressure, due to centrifugal force, is added to the tangential or dynamic pressure , thus increasing the effective head and assisting in the expulsion of the fluid.
In the motor, on the contrary, the first named pressure, being opposed to that of the supply, reduces the effective head and the velocity of radial flow towards the center. Again, the propelled machine a great torque is always desirable, this calling for an increased number of disks and smaller distance of separation, while in the propelling machine, for numerous economic reasons, the rotary effort should be the smallest and the speed the greatest practicable.
In standard BST the steam has to press on the blades in order for the rotor to extract energy from the steam speed, due to the difference between the relative speed of the steam and the blades.
Exactly these eddies are created according to the N3LM, or in reaction to the steam impacting the surface of the blades. One these eddies are loss to the useful energy that can be extracted from the system and second, as they are in opposite direction, they decrease the energy of the incoming steam stream. In TT, considering that there are no blades to be impacted what is the mechanism of this energy of reaction to materialize.
That belt is most dense, pressurized, in the periphery as it pressure, when the rotor is not under load, will be a notch less, then the steam pressure. In a normal operational mode, that peripheral pressure, as Tesla noted, plays a role of BEMF Back Electro Motive Force , limiting the flow of the incoming stream, and in this way the TT can be said to be self regulating. When the rotor is not under load the relative speeds between the "steam compressed spirals" SCS, the steam spirally rotating between the disks and the disks is minimal.
When a load is applied on the TT shaft the slows down, i. This is a dynamic environment and these speeds reach these values over time delta and not instantly. Here we have to note that fluids start to behave like solid bodies at high relative velocities, and in TT case, we also have to take in consideration the additional pressure.
According to the old literature on steam boilers it is said, that steam at high speed, resulting from high pressure source, cuts steel as a "knife cuts butter". This dynamics appears to be a derivative of what Tesla commented, and although it is not mentioned by him, it is a logical next step to explain the thermodynamics in the system.
Vortex Bladeless Wind Turbine - The Future of Wind Turbines?
Vortex says its bladeless turbines will generate electricity for 40 percent less than the cost of power from conventional wind turbines. Generators and gearboxes sitting on support towers meters off the ground can weigh more than tons. As the weight and height of turbines increase, the materials costs of wider, stronger support towers, as well as the cost of maintaining components housed so far from the ground, are cutting into the efficiency benefits of larger turbines. The alternative energy industry has repeatedly tried to solve these issues to no avail.
Vortex Bladeless wind turbine
In , Inventor Nikola Tesla patented a bladeless steam turbine that he claimed was the most efficient and the most simple rotary engine ever designed. Their turbine will be presented in this article along with other bladeless turbines like it that will enable us to revolutionize energy wind energy production worldwide. In fact these units can be installed on existing power poles in rural areas, to catch the wind and send its energy back to the plant. The saphonian bladeless wind turbine uses their patented zero-blade technology When wind interacts with the patented "Zero-Blade Technology", it drives pistons which then convert the wind energy into mechanical energy. Hydraulic pressure is then produced and converted into electricity using a hydraulic motor and generator. Incredibly, Saphon Energy claims that the efficiency of their Saphonian turbine exceeds the Betz limit. You can learn more about the Saphonian bladeless wind turbine in the following video.