## Wind Turbine Power Calculations

#### By marty-anemoi, 26th March 2021

A wind turbine consists of a few essential components that convert the wind’s kinetic energy into electrical energy. To determine how much energy will be available for conversion, one has to take factors such as the wind speed and the swept area of the turbine into account. Any wind farm project requires planning to establish how much power and energy output can be expected of each turbine to determine whether the project will be economically viable.

## How to calculate expected wind energy

1. It is crucial to know how much energy a wind turbine can produce in different conditions. To do this, one can calculate the rotational power produced at rated wind speed in a wind turbine. Rated wind speed is the minimum wind speed required for a wind turbine to produce power.
2. The Betz Limit or Betz Law theory concludes that a wind turbine cannot convert more than 16/27, or 59.3%, of the wind’s kinetic energy into mechanical energy by turning a rotor. This theory establishes that the maximum power efficiency, or power coefficient, of any wind turbine design is 0.59.
3. The power coefficient of each turbine type is unique and will be unique in the wind speed the turbine is operating in.
4. The true maximum power efficiency is usually lower than the Betz Limit at 0.35-0.45, even in premium wind turbines.
5. Once other factors of the wind turbine system, such as the gearbox, bearings, and generator, are taken into account, only about 10-30% of the wind power is converted into electrical energy.

Although turbine designers usually define expected wind turbine power, there is a relationship between various factors that affect wind speed power more than the rated wind speed. To understand any income that might be lost by the down-time of the turbine, it is vital to know turbine behavior at different wind speeds. Understanding these factors will also help with noticing any problems with the turbine when it is producing lower energy values than expected.

If you would like to talk to one of our experts for more information about our wind turbine services, get in touch with our team at ANEMOI today.

Category: Industry News

## Global Wind Energy Fact Sheet

#### By marty-anemoi, 20th March 2021

There are almost 60 000 utility-scale wind turbines installed in the U.S, with a cumulative wind energy capacity of 107.4 GW. These statistics suggest that there was an increased wind capacity of 166% in the U.S from 2010 until 2020. As renewable energy becomes increasingly popular, here is an overview of global wind energy.

## Global wind farm facts

• From 2009 to 2019, the global wind capacity increased on average by 15% annually.
• The overall capacity of globally installed wind turbines reached 650,8 GW by the end of 2019.
• 2019 was the second-strongest wind year in terms of market size, yielding a growth rate of 10,1%.
• All wind turbines that were installed by the end of 2019 can meet more than 6% of the global electricity demand.
• When it comes to total installed wind capacity in the U.S., the leading states are Texas (29,407 MW), Iowa (10,644), and Oklahoma (8,173 MW).
• The average turbine size increased in the U.S. by 5% from 2017 to 2018.
• During the same period, new wind energy purchase contracts averaged 1.3-1.8c per kWh. in 2019, the average residential electricity price was 13.0c per kWh.

## Wind energy performance and impacts on the environment

• U.S. wind capacity avoided millions of metric tons of carbon dioxide emissions and used approximately 103 billion gallons less water than conventional power plants in 2019.
• Studies have found that if wind-generated electricity in the U.S. reaches a capacity of 35% by 2050, the greenhouse gas emissions from the electric sector would be reduced by 23%.
• Although noise factors are often cited as a challenge for wind farms, the typical noise from a wind project is between 35-45 dB from a distance of 350m. Studies have shown that a quiet bedroom measures 35 dB.

If you would like more information about our national wind turbine services for your wind energy project, get in touch with our ANEMOI experts today.

Category: Industry News

## Wind Energy Advantages And Challenges

#### By marty-anemoi, 13th March 2021

Wind energy remains one of the fastest-growing energy sources globally due to the many advantages this form of renewable energy offers. However, certain challenges are keeping wind energy from being used on a greater scale. Here are some of the main benefits of wind energy and the challenges that need to be addressed to grow the industry.

• Cost-effective

Land-based wind power remains one of the lowest-priced energy sources. It only costs a mere 1-2 cents per kWh after production tax credit.

• Clean fuel source

Wind power doesn’t produce atmospheric emissions and doesn’t pollute the air, as it doesn’t require fossil fuels.

• Employment opportunities

The U.S. wind sector employs more than 100 000 workers. Wind turbine technicians are sought-after, and it is becoming one of the fastest-growing positions in the U.S. The Wind Vision Report estimates that wind energy could potentially support in excess of 600 000 jobs in the sectors of maintenance, manufacturing, installation, and supporting services by 2050.

• Sustainability

When the sun heats the atmosphere, the Earth rotates, and the wind blows over surface irregularities on the planet. This means that as long as there is sunshine, the wind will blow, and wind energy can be harnessed.

• Wind turbines can be built in rural areas

Rural economies greatly benefit from wind farms, as the wide open spaces provide optimal wind sites. These wind farms typically do not cause inconvenience to those working on the land, and landowners receive rent from wind power plant owners for the use of the land.

## Wind power challenges

• Wind energy has to compete with the costs of traditional generation sources

While there have been great strides over the past few decades in decreasing wind energy costs, these projects still need to compete to be economically viable against lower-priced electricity.

• Maintenance costs

The costs of operations and maintenance (O&M) at wind farms in the U.S.  ranged between \$42 000 – \$48 000 per MW in 2016. These costs can vary widely from projections, highlighting the importance of preventative maintenance to keep wind farms in optimum working conditions to keep O&M costs as low as possible.

• Wind sites are often rural

Land-based wind project sites are often located far from cities where electricity demand is high. This means that transmission lines typically need to be built.

• Noise and visual concerns

While wind projects have far less of an environmental impact than traditional power plants, there are concerns over the towers’ aesthetic effect on landscapes and noise produced by the long turbine blades.

• Use of land

Land-based projects often need to compete with projects that could deliver more revenue than electricity generation.

If you would like to improve your O&M costs with our expert wind energy services, contact our professional team at ANEMOI today.

Category: Industry News

## Assessing The Viability Of Residential Wind Farms

#### By marty-anemoi, 6th March 2021

Renewable energy is becoming increasingly popular, and many individuals are considering their own residential wind farms to go off-grid. A residential wind farm can reduce your energy bills and increase the value of your home. However, it should be noted that residential wind systems are typically accompanied by more challenges than residential solar systems. From a practical side, solar systems work better in densely populated areas and take up less space. If you are convinced that a residential wind system might work for your needs, continue reading below.

## Will a home wind turbine system work for me?

While a residential turbine system has its advantages, there are several factors to consider, and it will require some planning.

• A good starting point will be to establish whether small wind electric systems are allowed in your area. One of the main challenges of residential systems can be complaints from the rest of the neighborhood. These turbine towers are typically tall structures of about 80 to 100 feet high to get sufficient turbulence. For this reason, these systems are predominantly found in rural or farmland areas where there is space between properties.
•  Residential wind turbines are much smaller than popular industrial models. However, turbines require a minimum wind speed of 9-10mph, so be sure to establish whether your area will be able to meet these requirements.
• The Department of Energy has helpful information on residential renewable energy systems and stipulates the necessary regulations you will need to be aware of. You should also enquire about possible Federal tax breaks or refunds that might be available to homeowners who convert to renewable energy.

## Determining costs

You should get different quotations from different companies for turbine prices and installation. You should take the following costs into account when doing your calculations to determine whether a residential wind farm will be economically viable for you:

1.   Cost of a pole-mounted residential wind turbine
2.   Cost of the turbine pole with guy-wires
3.   Cost of concrete needed to secure the tower
4.   If a Federal Energy Tax credit applies to you, do factor that in to decrease your costs
5.   Research your local average annual wind speed.
6.   Determine how much kWh your turbine will generate per day in your area’s average wind zone to establish whether the costs associated with your residential system will be economically viable.

While residential wind farms might be viable to some consumers under the right conditions, solar energy systems are currently a better option.

If you require any commercial wind turbine services or information for your commercial wind farm project, contact our team of experts at ANEMOI today.

Category: Industry News