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Patent Issued for Wind Turbine Blades, Wind Turbines, And Wind Farms Having Increased Power Output (USPTO 10,400,743)

Source: 
Energy Business Daily

2019 SEP 17 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Business Daily -- National Technology & Engineering Solutions of Sandia LLC (Albuquerque, New Mexico, United States) has been issued patent number 10,400,743, according to news reporting originating out of Alexandria, Virginia, by NewsRx editors.

The patent’s inventors are Kelley, Christopher Lee (Albuquerque, NM); Maniaci, David Charles (Albuquerque, NM); Resor, Brian R. (Albuquerque, NM).

This patent was filed on December 22, 2015 and was published online on September 16, 2019.

From the background information supplied by the inventors, news correspondents obtained the following quote: “Wind turbines are used to generate energy for both local use and to support energy grid operations. A plurality of wind turbines are often arranged in wind farms. However, the wake from one or more of the wind turbines can interfere with the efficient operation of other wind turbines within the farm.

“What is needed is a wind turbine blade for a wind turbine having reduced wake that can be arranged in a wind farm operating arrangement having improved efficiency, performance and reliability.”

Supplementing the background information on this patent, NewsRx reporters also obtained the inventors’ summary information for this patent: “The disclosure is directed to a wind turbine blade having a blade geometry that increases loading on the inboard region of the blade and unloads the tip region.

“The disclosure is also directed to a wind turbine having wind turbine blades having a blade geometry that increases loading on the inboard region of the blade and unloads the tip region.

“The disclosure is also directed to a wind farm having a wind turbine having wind turbine blades having a blade geometry that increases loading on the inboard region of the blade and unloads the tip region.

“According to an embodiment of the disclosure, a turbine blade is disclosed that includes an inboard region and an outboard region. The inboard region has an induction factor of between 1/3 and 1/2, and the outboard region has an average induction factor between 0 and 1/3.

“According to another embodiment of the disclosure, a wind turbine is disclosed that includes at least one turbine blade having an inboard region; and an outboard region. The inboard region has an induction factor of between 1/3 and 1/2, and the outboard region has an average induction factor between 0 and 1/3.

“According to another embodiment of the disclosure, a wind farm is disclosed having two or more wind turbines having at least one wind turbine blade including an inboard region and an outboard region. The inboard region has an induction factor of between 1/3 and 1/2, and the outboard region has an average induction factor between 0 and 1/3.

“An advantage of the disclosed blade geometry is that wind turbines using the disclosed blade geometry may be more closely spaced in a wind farm due to reduced array losses, thereby increasing the energy extracted from the wind on a given area of land.

“Another advantage would be that new wind farms could take up less land since turbines could be placed closer together.

“Other features and advantages of the present invention will be apparent from the following more detailed description of the preferred embodiment, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention”

The claims supplied by the inventors are:

“What is claimed is:

“1. A turbine blade, comprising: an inboard region; and an outboard region; wherein the inboard region has an induction factor of between 1/3 and 1/2 at a tip speed ratio of 9; and wherein the tangential induction factor is calculated by ‘.function.lamda.lamda.times.function.times.times.lamda.times.ti- mes.times.times.times.times.function.lamda.times.times.function.- lamda.times.times.times.times.times.times.lamda.times.times.time- s.times. ##EQU00015## and wherein the blade geometry parameter is calculated by .LAMBDA.function.lamda.times.pi.times.times.function.times.times- .lamda.function.’.times.lamda.function.times.’.times.times.times.l- amda.times.times.’ ##EQU00016## and wherein the normalized chord is calculated by .LAMBDA.function.lamda.function. ##EQU00017## and wherein the blade twist is calculated by .beta.times.times.lamda.function.times.’.alpha. ##EQU00018## and wherein parameters are defined as found in this disclosure.

“2. The turbine blade of claim 1, wherein the outboard region has an average induction value of no less than 0 and no greater than 1/3.

“3. The turbine blade of claim 1, wherein the inboard region has an induction factor of between 0.35 and 0.45.

“4. The turbine blade of claim 1, further comprising: a base at a first end of the inboard region; a tip at a first end of the outboard region; and a length extending from the base at the first end of the inboard region to the tip at the first end of the outboard region; wherein the outboard region is between 3% and 40% of the length.

“5. The turbine blade of claim 4, wherein the outboard region is between 15% and 25% of the length.

“6. The turbine of claim 4, wherein the inboard region is between 60% and 97% of the length.

“7. The turbine blade of claim 1, wherein the outboard region comprises at least one region using a NACA 63.sub.6-618 airfoil.

“8. A wind turbine, comprising: at least one turbine blade, comprising: an inboard region; and an outboard region; wherein the inboard region has an induction factor of between 1/3 and 1/2 at a tip speed ratio of 9; and wherein the tangential induction factor is calculated by ‘.function.lamda.lamda.times.function.times.times.lamda.times.ti- mes.times.times.times.times.function.lamda.times.times.function.- lamda.times.times.times.times.times.times.lamda.times.times.time- s.times. ##EQU00019## and wherein the blade geometry parameter is calculated by .LAMBDA.function.lamda.times.pi.times.times.function.times.times- .lamda.function.’.times.lamda.function.times.’.times.times.times.l- amda.times.times.’ ##EQU00020## and wherein the normalized chord is calculated by .LAMBDA.function.lamda.function. ##EQU00021## and wherein the blade twist is calculated by .beta.times.times.lamda.function.times.’.alpha. ##EQU00022## and wherein parameters are defined as found in this disclosure.

“9. The turbine blade of claim 8, wherein the outboard region has an average induction value of no less than 0 and no greater than 1/3.

“10. The turbine blade of claim 8, wherein the inboard region has an induction factor of between 0.35 and 0.45.

“11. The turbine blade of claim 8, further comprising: a base at a first end of the inboard region; a tip at a first end of the outboard region; and a length extending from the base at the first end of the inboard region to the tip at the first end of the outboard region; wherein the outboard region is between 3% and 40% of the length.

“12. The turbine blade of claim 11, wherein the outboard region is between 15% and 25% of the length.

“13. The turbine of claim 11, wherein the inboard region is between 60% and 97% of the length.

“14. The turbine blade of claim 8, wherein the outboard region comprises at least one region using a NACA 63.sub.6-618 airfoil.

“15. A wind farm, comprising: two or more wind turbines of claim 8.”

For the URL and additional information on this patent, see: Kelley, Christopher Lee; Maniaci, David Charles; Resor, Brian R. Wind Turbine Blades, Wind Turbines, And Wind Farms Having Increased Power Output. U.S. Patent Number 10,400,743, filed December 22, 2015, and published online on September 16, 2019. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=10,400,743.PN.&OS=PN/10,400,743RS=PN/10,400,743

 

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