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You are here: Home / Archives for renewables

renewables

Can Germany Meet Its Energy Goals?

February 4, 2019 By EarthWise Leave a Comment

Germany has been a global leader in efforts to decarbonize its massive economy.  A national initiative known as Energiewende – or clean energy transition – has been in place since 2010 and relies heavily on renewable energy sources, energy efficiency, and energy demand management.

The program has involved some of the most aggressive deployment of renewable energy sources in the world.  Germany was the first country to install 1 GW of solar energy and still has the 5th largest amount of solar power in the world despite actually being a country with fairly limited sunshine.  Germany has nearly 30,000 wind turbines, most of which are onshore, unlike many other countries in northern Europe.  Over the past five years, government support and cost to consumers for the shift to clean energy have totaled over $180 billion.

However, despite these efforts, Germany’s greenhouse gas emissions have not declined as rapidly as expected, even though nearly 40% of the country’s electricity now comes from renewable sources.

This lack of expected success comes as a shock to the environmentally conscious German population, nearly 90% of which supports the program.

There are two major problems Germany faces.  One is that Germany is Europe’s largest producer of coal, which still generates more than a third of the country’s power.  The other is that Germany’s large auto industry is still married to gas- and diesel-fueled cars and emissions from the country’s cars are a big problem.

The Energiewende program was driven by political will and investment certainty.  It is unclear whether Germany can muster these forces again.  The Merkel government has dragged its feet on environmental issues in recent years.  It remains to be seen what effect shifting political power in Germany will have.

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Carbon Crossroads: Can Germany Revive Its Stalled Energy Transition?

Photo, posted August 15, 2011, courtesy of Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

A New Way to Make Hydrogen

January 31, 2019 By EarthWise Leave a Comment

Many people consider hydrogen to be the fuel of the future, both for powering vehicles and for storing energy generated by renewable sources.   Hydrogen itself is a clean and green fuel.  Generating energy from it using fuel cells results in only water as a byproduct.

The biggest problem with hydrogen is that the most economical way to produce it and therefore the way most hydrogen is produced today, is by reforming natural gas, which is a process that generates carbon emissions.

The desirable way to make hydrogen is to produce it by breaking apart water into its hydrogen and oxygen components, a process known as electrolysis.   There are many ways to do it, but none of them to date measures up in terms of efficiency, cost, and longevity.

Researchers at the University of Toronto have recently developed a new catalyst that uses abundant, low-cost elements to split water molecules into hydrogen and oxygen.  The catalyst is made from copper, nickel, and chromium, all of which are more abundant and less costly than platinum, which is the usual electrolysis catalyst.

The new catalyst performs well under pH-neutral conditions, which means it could even work on seawater without incurring the expense of desalination.  The Toronto researchers also believe their catalyst could be used as part of a process to make hydrocarbon fuels from hydrogen and CO22.  Their group is among the five finalists in the Carbon XPrize competition, which has a grand prize of $7.5 million for finding a way to convert waste CO2 into fuel.

Finding a low-cost, energy-efficient, and reliable way to make hydrogen out of water will be a big deal if it can be done on an industrial scale.

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U of T researchers discover low-cost way to produce hydrogen from water

Photo, posted July 23, 2015, courtesy of Magnus Johansson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Support For A Green New Deal

January 23, 2019 By EarthWise Leave a Comment

Shortly after the November election, activists held a sit-in at Nancy Pelosi’s office calling for a Green New Deal – a plan to transform the U.S. energy economy in order to mitigate the effects of climate change as well as address various issues of economic justice.   While a number of Congress people have pledged to back the creation of a select committee to develop such a plan, it remains a political football and it remains to be seen whether anything will come of the idea.

There appears to be much less reticence on the part of voters, at least according to a survey conducted by the Yale Program on Climate Change Communication at the end of November.  The survey gave a brief explanation of the Green New Deal and asked respondents “How much do you support or oppose this idea?”

The result was that 81% of registered voters either “strongly” or “somewhat” supported it.  Support was stronger among Democrats at 92%, but a majority of Republicans were also in favor.  Some 57% of self-identified conservative Republicans even thought it was a good idea.

The Green New Deal would accelerate the transition from fossil fuels to clean, renewable energy.  The goal would be to generate 100% of the nation’s electricity from renewable sources within the next 10 years; upgrade the nation’s energy grid, buildings, and transportation infrastructure; increase energy efficiency; invest in green technology research and development; and provide training for jobs in the new green economy.

Even though most Americans have strong support for the ideas of the Green New Deal, it is quite uncertain whether such an initiative could become a reality, given that very influential special interest groups – notably the fossil fuel industry – will be fighting it tooth and nail.

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81% of Voters Support a Green New Deal, Survey Finds

Photo, posted March 19, 2012, courtesy of Kate Ausburn via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Big Success From A Big Battery

January 1, 2019 By EarthWise Leave a Comment

In the fall of 2017, Tesla took on the challenge of installing a 100-megawatt battery storage system in South Australia in under 100 days, promising that the system would be free if it was not built in time.  The project was actually completed in 54 days.

The system is located at the Hornsdale Wind Farm, which consists of 99 wind turbines with a generation capacity of 315 MW.  The Hornsdale Power Reserve installation is the world’s largest lithium-ion battery system and, after a year of operation,has proven to be a smashing success. Estimates are that the project has reduced costs associated with stabilizing the energy grid by about $29 million. The cost of the system was about $87 million, so it is paying for itself quite rapidly. The wind farm and battery systems are owned and operated by a French renewable energy company.

The battery storage system provides a variety of different services to the electric grid.  The primary motivation for it was to achieve system security and reduce the risk of blackouts and load shedding.   Having the battery system in place protects the regional interconnection from tripping,which reduces the risk of separation of South Australia from the National Electricity market.  The system also provides so-called ancillary services such as frequency control and other forms of electricity supply regulation.

The most significant contribution of the Hornsdale Power Reserve is that it has raised the profile of energy storage technology and demonstrated its unique capabilities.  Based on the success of the system, there are now about 2,500 MWh of new storage projects announced by the public and private sectors in Australia.

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Web Links

Tesla’s Battery Has Already Saved South Australia a Huge Amount of Money

Photo courtesy of Hornsdale Power Reserve. 

Earth Wise is a production of WAMC Northeast Public Radio.

Growing Use Of Wind And Solar Power

December 10, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/12/EW-12-10-18-Growing-Use-of-Wind-and-Solar.mp3

According to a new report from the U.S. Energy Information Administration, solar and wind energy now generate more than 20% of the electricity used in 10 states.  Topping the list is Iowa, which got 37% of its electricity from wind and solar in 2017.  The next three states were Kansas, Oklahoma, and South Dakota, all getting more than 30% of their power from the renewables.  The top five states, which adds North Dakota to the list, actually get nearly all of their renewable energy from wind.  In fact, during some months in 2017, Iowa and Kansas both got more than half of their electricity from wind.

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More Power From The Sun’s Heat

November 29, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/11/EW-11-29-18-More-Power-From-The-Suns-Heat.mp3

When we think of solar power, we usually are talking about the panels that generate electricity using the photovoltaic effect.  These panels are on millions of rooftops around the world and in utility-scale solar farms.   There are also solar water heating systems that use the sun’s heat to provide hot water for homes and businesses.

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Turning Plastic Waste Into Green Energy

November 14, 2018 By EarthWise 1 Comment

https://earthwiseradio.org/wp-content/uploads/2018/11/EW-11-14-18-Turning-Plastic-Waste-into-Green-Energy.mp3

In the Back to the Future movies, the DeLorean time machine ran on garbage.  We aren’t any closer to building time machines, but it might soon be practical to produce fuel from garbage.

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Environmental Impact of Wind Power

November 8, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/11/EW-11-08-18-Environmental-Impact-of-Wind-Power.mp3

A recent study by Harvard University researchers published in two papers looked at the environmental impact of installing sufficient wind power to meet all the energy needs of the US.  While doing so would be far better for the environment than burning coal, it would not have negligible impacts. 

[Read more…] about Environmental Impact of Wind Power

California vs. Fossil Fuels

September 19, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/09/EW-09-19-18-California-vs-Fossil-Fuels.mp3

California has led the way in deploying and committing to clean energy for a long time.  In August its legislature strengthened that commitment by passing a bill to stop using fossil fuels entirely by 2045.   It is the second state to do so, following Hawaii.  The bill still needs to be passed by the Senate and signed by the governor.  Both actions are expected to occur.

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Global Warming And Air Conditioners

August 24, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/08/EW-08-24-18-Global-Warming-and-Air-Conditioners.mp3

All those record high temperatures around the world this summer – such as during the unprecedented heatwave in Japan – put the spotlight on the growing dependence we all have on air conditioning. 

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Clean Power Is Not Enough

August 17, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/07/EW-08-17-18-Clean-Power-is-Not-Enough.mp3

A recent study published in Nature Climate Change looked at what emission reductions are needed to meet the climate targets of the Paris Accords.  The results are sobering.

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The Future Of Energy

August 3, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/07/EW-08-03-18-The-Future-of-Energy.mp3

A new report by Bloomberg New Energy Finance takes a long-term look at the world’s energy production.  According to the report, renewable energy, mostly in the form of solar and wind power, is set to provide close to 50% of the world’s energy by the year 2050.

[Read more…] about The Future Of Energy

Fighting Methane With Bacteria

June 14, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/06/EW-06-14-18-Fighting-Methane-with-Bacteria.mp3

Bacteria may have an important role to play in the effort to reduce greenhouse gas emissions.  A group of researchers at the University of Alberta are genetically engineering non-hazardous bacteria that consume methane and turn it into fuel.

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Investing In Solar Power

May 21, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/05/EW-05-21-18-Investing-in-Solar-Power.mp3

The total amount of solar power capacity installed in the world reached 100 gigawatts in 2012.  Getting to that amount took decades.  But things have changed in dramatic fashion in recent years.

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Greenhouse Gas Emissions Rising Again

May 8, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/04/EW-05-08-18-Greenhouse-Gas-Emissions-Rising-Again.mp3

If we want to avoid drastic global warming this century, we need to sharply reduce greenhouse gas emissions over time.   For the previous three years, emissions had been holding steady, but last year, global emissions from the use of coal, oil and natural gas increased by 1.4%.  According to the International Energy Agency, this unfortunate new data should serve as a strong warning that we need to increase our efforts to combat climate change.

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Renewable Energy From Wood

April 5, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/04/EW-04-05-18-Renewable-Energy-from-Wood.mp3

Biofuels are fuels produced through contemporary biological processes rather than geological processes such as those involved in the formation of fossil fuels.

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A Giant Wind Farm for Oklahoma

April 3, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/03/EW-04-03-18-A-Giant-Oklahoma-Wind-Farm.mp3

American Electric Power (AEP) is investing $4.5 billion to build the largest wind farm in the United States at a site in the Oklahoma panhandle.  Known as the Wind Catcher Energy Connection, the 2-gigawatt wind project will include 800 2.5-megawatt wind turbines built by General Electric.

[Read more…] about A Giant Wind Farm for Oklahoma

Renewable Powered Cities

March 29, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/03/EW-03-29-18-Renewable-Powered-Cities.mp3

Cities are responsible for 70% of the world’s energy-related CO2 emissions and it appears that they are taking responsibility for reducing them.  Over 7,000 mayors around the world have signed up to the Global Covenant of Mayors for Climate and Energy, thereby pledging to act on climate change.

[Read more…] about Renewable Powered Cities

Renewables In Texas

March 12, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/02/EW-03-12-18-Renewables-in-Texas.mp3

When we think about Texas, we think of oil and conservative politics.  But Texas is also earning a reputation as a leading state for integrating renewable energy into its electric grid.

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Renewables Beat Out Coal In Europe

March 5, 2018 By EarthWise 1 Comment

https://earthwiseradio.org/wp-content/uploads/2018/03/EW-03-05-18-European-Renewables-Beat-Coal.mp3

Last year was the first year in which more electricity in Europe was generated from the combination of wind, sun, and biomass than from coal.  The combination of all clean energy sources (which adds hydropower to the mix) surpassed coal several years ago.

[Read more…] about Renewables Beat Out Coal In Europe

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