Renewable energy just kept getting cheaper and cheaper despite ongoing subsides for the oil and gas industries. This is really good to see as people who only care about short term economic energy decisions will have to start to advocate for renewable energy. The decrease in cost for renewable wind power can be attributed to bigger blades and better energy grid management. This means that not only is wind power cheaper, the better grid management can lead to other renewable sources getting cheaper too.
In the US, the prices for wind power had risen up until 2009, when power purchase agreements for wind-generated electricity peaked at about $70 per MegaWatt-hour. Since then, there’s been a very steady decline, and 2018 saw the national average fall below $20/MW-hr for the first time. Again, there’s regional variation with the Great Plains seeing the lowest prices, in some cases reaching the mid-teens.
That puts wind in an incredibly competitive position. The report uses an estimate of future natural gas prices that show an extremely gradual rise of about $10/MW-hr out to 2050. But natural gas—on its own, without considering the cost of a plant to burn it for electricity—is already over $20/MW-hr. That means wind sited in the center of the US is already cheaper than fueling a natural gas plant, and wind sited elsewhere is roughly equal.
An often overlooked aspect of sustainable energy is the seemingly simple switching of electricity. Physical switches slow down the ability of repairs on power systems and can even hinder the installation of renewable energy sources. A lot of renewable energy systems (solar, wind, tidal, etc.) fluctuate greatly in the power output which strains switches; this is where digital circuits thrive. With digital switching it is easier to dynamically change power sources and remotely monitor them.
“Instead of using mechanics to switch the power, we apply digital inputs,” Kennedy told Popular Mechanics. “Now I have no moving parts. Now I have the ability to connect things like iPhones and iPads for remote power management, which increases safety and improves efficiency. I can set the distribution panel to a schedule so the flow of power is seamless, unlimited, and shifts between sources automatically. You literally wouldn’t notice. The lights wouldn’t even flicker.”
For a grid-connected solar home, for example, residents sometimes have to disconnect their solar input because traditional power systems (including the circuit breakers) aren’t advanced enough to properly manage multiple power sources that change.
The Canadian government has decided to end the use of coal for electricity by the year 2030. To make up the lost production the provinces which still use coal will have to replace their power plants with sustainable alternatives. This makes a lot of sense since using coal for electricity is really (really really really) bad for the environment and, as regular readers of this site know, the cost of setting up renewable energy is getting cheaper every year.
Let’s hope that other countries follow suit and stop using coal to produce electricity.
In announcing the plan today, federal Environment Minister Catherine McKenna said about 80 per cent of Canada’s electricity currently comes from clean sources such as hydroelectric power, nuclear, wind and solar. The goal is to make 90 per cent of electric power generation free of greenhouse gas emissions by 2030.
“This will help build a more sustainable future, and it is also a great economic opportunity,” she said during a news conference in Ottawa.
The plan accelerates the current timetable for the four provinces that still burn coal for electricity — Alberta, Saskatchewan, Nova Scotia and New Brunswick — to either capture carbon emissions, adopt technology or shut down the plants.
Bloomberg is reporting that they anticipate a sixfold increase in star capacity thanks to the efficiency of a having a naturally-occuring ball of fire in our solar system. The sun is an abundant resource which shines its rays on us and now we have the industrial means to convert the sun’s rays into a powerful electric resource.
The growth of solar installations over the last decade of furthered their adoption in a positive feedback loop of success. As more places adopt solar the cheaper it becomes and the more incentive there is to make the whole system more efficient.
The “most attractive” markets for solar panels up to 2020 are Brazil, Chile, Israel, Jordan, Mexico, the Philippines, Russia, South Africa, Saudi Arabia, and Turkey, according to Irena. Global capacity could reach 1,760 to 2,500 gigawatts in 2030, compared with 227 gigawatts at the end of 2015, it said.
Smart grids, or power networks capable of handling and distributing electricity from different sources, and new types of storage technologies will encourage further use of solar power, Irena said.
As of 2015, the average cost of electricity from a utility-scale solar photovoltaic system was 13 cents per kilowatt hour. That’s more than coal and gas-fired plants that averaged 5 cents to 10 cents per kilowatt hour, according to Irena. The average cost of building a solar-powered electricity utility could fall to 79 cents per watt in 2025 from $1.80 per watt last year, it said. Coal-fired power generation costs are about $3 per watt while gas plants cost $1 to $1.30 per watt, according to Irena.
With COP21 happening this week in Paris there are many approaches to fighting climate change being discussed. No matter what approach is used there will have to be structural changes in how energy is delivered and how goods are transported. Over at Gizmodo they took a look at how quickly we can transition to a low-carbon energy system and it turns out we can do it rather quickly. Infrastructure takes time to rebuild and adopt to new technologies and the sooner we start the better.
Many different policy approaches could help, both to reduce consumption and to increase the share of renewables in the energy mix.
Building codes could be gradually adjusted to require that every rooftop generate energy, and/or ratcheted up to LEED “green building” standards. A gradually increasing carbon tax or cap-and-trade system (already in place in some nations) would spur innovation while reducing fossil fuel consumption and promoting the use of renewables.
In the United States, at least, eliminating the many subsidies that currently flow to fossil fuels may prove politically easier than taxing carbon, yet send a similar price signal.