Wind Energy

Tue, 17 Dec 2019 16:42:26 UTC

Consider marine life when implementing offshore renewable power

With countries adopting green energy practices, renewable energy now accounts for a third of the world's power. As this trend continues, more countries are looking to offshore energy sources to produce this renewable energy. Researchers identify situations where green technology such as wind turbines, wave energy converters, and other marine renewable energy devices (MREDs) have had negative consequences on marine life. … read more
Thu, 12 Dec 2019 15:46:42 UTC

Supporting structures of wind turbines contribute to wind farm blockage effect

Much about the aerodynamic effects of larger wind farms remains poorly understood. New work looks to provide more insight in how the structures necessary for wind farms affect air flow. Using a two-scale coupled momentum balance method, researchers theoretically and computationally reconstructed conditions that large wind farms might face in the future, including the dampening effect that comes with spacing turbines close to one another. … read more
Tue, 10 Dec 2019 16:17:05 UTC

Insects' drag-based flight mechanism could improve tiny flying robots

Thrips don't rely on lift in order to fly. Instead, the tiny insects rely on a drag-based flight mechanism, staying afloat in airflow velocities with a large ratio of force to wing size. Researchers have performed the first test of drag force on a thrip's wing under constant airflow in a bench-top wind tunnel and, drawing from microfabrication and nanomechanics, they created an experiment in which a thrip's wing was glued to a self-sensing microcantilever. … read more
Wed, 27 Nov 2019 17:13:35 UTC

Biodiversity and wind energy

The location and operation of wind energy plants are often in direct conflict with the legal protection of endangered species. The almost unanimous opinion of experts from local and central government authorities, environmental NGOs and expert offices is that the current mechanisms for the protection of bats in wind power projects are insufficient. … read more
Wed, 20 Nov 2019 17:11:41 UTC

Wind more effective than cold air at cooling rooms naturally

The effectiveness of non-mechanical, low-energy methods for moderating temperature and humidity has been evaluated in a series of experiments. … read more
Tue, 19 Nov 2019 12:53:06 UTC

Decarbonizing the power sector

Electricity supply is one of the biggest CO2 emitters globally. To keep global warming well below 2°C, several paths lead to zero emissions in the energy sector, and each has its potential environmental impacts -- such as air and water pollution, land-use or water demand. Using a first-time combination of multiple modelling systems, an international team of researchers has now quantified the actual benefits and downsides of three main roads to decarbonization. … read more
Tue, 19 Nov 2019 12:53:00 UTC

Boosting wind farmers, global winds reverse decades of slowing and pick up speed

In a boon to wind farms, average daily wind speeds are picking up across much of the globe after about 30 years of gradual slowing. Research shows that wind speeds in northern mid-latitude regions have increased by roughly 7% since 2010. … read more
Wed, 13 Nov 2019 13:29:59 UTC

Climate impact of hydropower varies widely

Hydropower is broadly considered to be much more environmentally friendly than electricity generated from fossil fuels, and in many cases this is true. However, a new study reveals that the climate impact of hydropower facilities varies widely throughout the world and over time, with some facilities emitting more greenhouse gases than those burning fossil fuels. … read more
Tue, 12 Nov 2019 16:03:35 UTC

Superconducting wind turbine chalks up first test success

A superconducting rotor has been successfully tested on an active wind turbine for the first time. The researchers designed, developed, manufactured a full-size superconducting generator for a 3.6 megawatt wind turbine, and field-tested it. … read more
Tue, 12 Nov 2019 14:06:42 UTC

Study shows where global renewable energy investments have greatest benefits

New study finds that the amount of climate and health benefits achieved from renewable energy depends on the country where it is installed. Countries with higher carbon dioxide (CO2) emissions and more air pollution, such as India, China, and areas in Southeast Asia and Eastern Europe, achieve greater climate and health benefits per megawatt (MW) of renewable energy installed than those operating in areas such as North America, Brazil, and parts of Europe. … read more
Tue, 29 Oct 2019 12:07:21 UTC

Where to install renewable energy in US to achieve greatest benefits

A new study shows that to achieve the biggest improvements in public health and the greatest benefits from renewable energy, wind turbines should be installed in the Upper Midwest and solar power should be installed in the Great Lakes and Mid-Atlantic regions. … read more
Mon, 28 Oct 2019 21:51:42 UTC

To rid electric grid of carbon, shore up green energy support

Engineers, along with an economist, have created an energy model that helps to remove carbon-generated power from the US electric grid -- replacing it with a greener, financially feasible wind, solar and hydro energy system. … read more
Fri, 25 Oct 2019 21:08:10 UTC

Study casts doubt on carbon capture

Current approaches to carbon capture can increase air pollution and are not efficient at reducing carbon in the atmosphere, according to new research. … read more
Mon, 21 Oct 2019 21:13:33 UTC

Replacing coal with gas or renewables saves billions of gallons of water

The transition from coal to natural gas in the US electricity sector is reducing the industry's water use, research finds. For every megawatt of electricity produced using natural gas instead of coal, the water withdrawn from rivers and groundwater drops by 10,500 gallons, and water consumed for cooling and other plant operations and not returned to the environment drops by 260 gallons. Switching to solar or wind power could boost these savings even more. … read more
Wed, 16 Oct 2019 16:45:41 UTC

Computer models show clear advantages in new types of wind turbines

Researchers have modeled the fluid dynamics of multi-rotor wind turbines via high-resolution numerical simulations. The simulations demonstrate a clear advantage for a turbine model with four rotors. The researchers found, that the wind turbine wake recovers much faster with multi-rotor turbines, that multi-rotor turbines produce slightly more energy than single-rotor turbines, and that a turbine with four rotors as far apart as possible is the optimal construction. … read more
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