The case for optimism on climate change - "I'll finish with this story. When I was 13 years old, I heard that proposal by President Kennedy to land a person on the Moon and bring him back safely in 10 years. And I heard adults of that day and time say, 'That's reckless, expensive, may well fail.' But eight years and two months later, in the moment that Neil Armstrong set foot on the Moon, there was great cheer that went up in NASA's mission control in Houston. Here's a little-known fact about that: the average age of the systems engineers, the controllers in the room that day, was 26, which means, among other things, their age, when they heard that challenge, was 18." (via; previously) [more inside]
Tesla Powerwall Battery Economics: Almost There - "Elon Musk announced Tesla's home / business battery today. [video] tl;dr: It'll get enthusiastic early adopters to buy. The economics are almost there to make it cost effective for a wide market... That said, for large scale grid deployment (outside of the home), it still looks like flow batteries and advanced compressed air are likely to be far cheaper in the long run." [more inside]
UN Climate Report: We Must Focus On 'Decarbonization', and It Won't Wreck the Economy - "The basic message is simple: We share a planet. Let's start acting like it." [more inside]
Installed solar capacity is growing by leaps and bounds, led by Walmart and Apple, and helped by bonds backed by solar power payments,[*] which have sent industry stocks soaring, even as molten salt and new battery technologies come on line to generate storage for use when the sun doesn't shine. Of course we could always go to geostationary orbit -- or the moon -- as well we may (if politics allow it) as thirst from the developing world grows beyond the earth's carrying capacity. [more inside]
I love a sun-powered country, A land of deepening mines, of ragged nuclear plants, of biomass and hydropower
While developed countries are pondering whether they should sign up to The Kyoto 2 Protocol and cut greenhouse gas emissions by 5% by 2020, based on 2000 levels which may be of questionable impact, the tiny Pacific territory of Tokelau has ditched its primary source of electricity generation, costly diesel imports, in favour of 100% renewable solar power, becoming the first nation in the world to do so, at a time when the global energy systems of the 21C are struggling towards decarbonisation. [more inside]
Solar Islands: A new concept for low-cost solar energy at very large scale.
A reduced-scale prototype is under construction.
A reduced-scale prototype is under construction.
Some interesting things have recently happened in the world of solar power: Evergreen and Solyndra have gone bankrupt, panel cost has gone sub $1.00/watt, and China has vastly increased production capacities. [more inside]
Most of the talk about renewable energy is aimed at electricity production. However, most of the energy we need is heat, which solar panels and wind turbines cannot produce efficiently. To power industrial processes like the making of chemicals, the smelting of metals or the production of microchips, we need a renewable source of thermal energy. Direct use of solar energy can be the solution, and it creates the possibility to produce renewable energy plants using only renewable energy plants, paving the way for a truly sustainable industrial civilization. [more inside]
Around one year ago we saw some of the recent events in solar power. At that time solar panels topped out at a peak efficiency of around 290W for a 1.99 x 0.99 meter 72-cell module, with a lone rare and expensive 315W module that was used to build team Germany's solar decathlon winning house. Since then prices have dropped a lot, and China is advancing in commodity tech. [more inside]
Solar power continues to become more economical with every passing month. The price of standard monocrystalline/polycrystalline 210W to 300W modules has halved, from above $3/watt to below $1.70/watt in the past 12 months. The Canadian province of Ontario has become the first location in North America to offer an aggressive feed-in tariff comparable to the feed-in tariffs in Germany and Spain, paying above 80 cents/kWh for power generated by small rooftop photovoltaic installations. The US federal government is also offering massive tax breaks for solar installations as part of the 2009 ARRA act. [more inside]
For the second time in two years a team from Germany has won the US Department of Energy's Solar Decathalon. This year's entry was a cube shaped house entirely covered in 300W and 70W solar panels generating a peak of 11.1kW. The DoE has published a complete product directory of all the subsystems and components used to build each house. Another notable design is the Canadian Team North house designed for optimal solar+insulation performance in high latitude climates.
Wind, water and solar technologies can provide 100 percent of the world's energy, eliminating all fossil fuels. HERE'S HOW (via) [more inside]
Pics of the new Tesla S-Model have been leaked. With an anticipated price tag of 50K and a potential 45-minute recharge time, will this finally kick-start a true replacement to the internal combustion engine? And if so, where will the electricity come from? What future is there for the fuel-cell vehicle, or will fuel cells remain stationary? Is that really it for hydrogen? [more inside]
Meta-efficiency is the analysis of efficiency at a more comprehensive level. Metaefficient Review assesses products considering not only their energy efficiency but also the embodied energy, toxicity, affordability, and usability. [more inside]
Chris Goodall, author of Ten Technologies to Save the Planet, talks about the ten big green energy myths.
The Solar Decathlon is a just-completed competition in which 20 teams of college and university students competed to design, build, and operate the most attractive and energy-efficient solar-powered house. View a photo gallery or take video tours of the homes. Inhabitat has been blogging the event - here's their view of Germany's winning entry. [more inside]
Google went solar yesterday! Google's PV solar system went live yesterday (or at least the stats page did.) Also, they converted 100 Priuses to plug-in electric vehicles, to be recharged by the PV solar panels. Pictures.
Solar Tower (text and video). "The rays of sunlight reflected by a field of 600 huge mirrors are so intense they illuminate the water vapour and dust hanging in the air."
Mike Strizki lives in the nation's first solar-hydrogen house. "The technology this civil engineer has been able to string together – solar panels, a hydrogen fuel cell, storage tanks, and a piece of equipment called an electrolyzer – provides electricity to his home year-round, even on the cloudiest of winter days. Mr. Strizki's monthly utility bill is zero – he's off the power grid – and his system creates no carbon-dioxide emissions. Neither does the fuel-cell car parked in his garage, which runs off the hydrogen his system creates."
CitizenRe is a solar power rental company for the home. Free to install (!), a monthly rental fee is equal to what would normally be paid to the power company. Video.