_kt75 | mirror

  reprint (by W. Scharnhorst ) Divestment of stocks in fossil fuel companies may seem like a good idea if the goal is to put financial pressure on conventional energy companies and thereby leave an opening for cleaner alternative fuels in the fight against climate change. The question is whether the strategy works. Certainly any company, whose core business is making money, is likely to take notice of any activity that affects its revenues. Yet many argue that a drop in investment in an energy company may not be the best way to get its attention, especially at a time when alternative energies are scarce and fossil fuels remain the dominant source of power . In other words, how many people today can afford to junk their gasoline-powered cars and invest in more expensive electric models? That’s exactly the point made by London Mayor Boris Johnson, a member of Britain’s Conservative Party who also harbors libertarian, if not liberal, political views. The Lond...

  reprint (by W. Scharnhorst ) Hydraulic fracturing, or fracking , is shunned by the environmentalists that laud renewable energy sources. However, by not supporting both initiatives, they may be working at cross purposes. Natural gas, booming largely because of fracking, complements renewable energies on the grid . The two seemingly opposite technologies are, for the moment, inextricably linked. Renewable energies like solar and wind produce most of their output at times of the day when not that many people need it. Peak demand for electricity is usually in the morning and evening. Solar production is highest during the middle of the day and afternoon, and wind reaches its highest production at night. Because there is no large-scale economical way to store that energy and reconcile the misaligned supply and demand, most of our peak demand must still rely on non-renewable fuel sources. _progress | M replaces _kt75 | mirror. visit: http://progress-m.blogspot.com . ...

reprint The solar energy industry may prove to be a dark horse in the race to provide global energy security. The world has renewed its interest in solar energy investment as it searches for a cleaner and more sustainable alternative to conventional fossil fuels. Countries like China , Germany, the UK, the US, Japan and Canada have already made significant investments in solar power . Who are the other players who are investing big in solar energy? With its own set of limitations such as high installation costs and high plug-in time, are consumers across the world ready to choose solar energy to power their daily lives? Or, are the conventional energy sources still the best bet? The best part about solar energy is that it is abundant and freely available, at least in most parts of the world. However, the high upfront costs of a photo voltaic panel remain a concern for many. Things are changing fast, however, and according to data from SEIA, the cost of an average PV system i...

reprint European energy storage developers have until the end of this month to submit proposals for projects in a new 10-year transmission system operators plan. But the minimum requirements imposed by the European Network of Transmission System Operators for Electricity (ENTSO-E) mean that only a small number of projects might be eligible. _progress | M replaces _kt75 | mirror. visit: http://progress-m.blogspot.com . ready: 01.07.2015. close ✕ ENTSO-E, which represents 41 system operators in Europe, announced the search for energy storage plants at the end of last month as part of a 10-year network development plan. The plan, updated every two years, acts as the basis for a list of so-called "projects of common interest" to better integrate the grid across the European Union. To be eligible for inclusion, a project has to be at least partially located in one of the 34 countries represented within ENTSO-E, and needs to have a minimum 225-megawatt installed cap...

reprint In an industrial park on the outskirts of Pullman, Wash., 10 white storage trailers sit side by side, neatly arranged in two rows. These are no ordinary storage units. Arranged on racks inside are the guts of a large rechargeable battery, the kind of device that can store and release utility-scale amounts of electricity. But this is no ordinary storage battery , either. In contrast with the typical lead-acid batteries used to start car engines or the lithium-ion cells that power electric vehicles — both of which are largely solid — this battery is mostly liquid. The chemicals that react to produce electricity are dissolved in water and circulated into and out of the heart of each cell, where the reaction occurs. For that reason, it is called a flow battery, and the one in Pullman, a demonstration project that will be tested over the next year and a half, is one of the largest in the world. It can store about 3.2 megawatt-hours of energy and discharge a meg...

note The present issue of the Quarterly Notes on Sustainable Water Management (Q01/2015) – Groundwater Management – concentrates exclusively on issues like aquifer replenishment/recharge, energetic as well as geo-political issues of groundwater access and use as well as other effects on groundwater, for example by the mining industry. The key topics addressed by the articles comprise among others: •    Managed Aquifer Recharge (MAR) •    Forecasting ground water levels •    Aquifer Protection •    Combined operation of wind mills and ground water pumping •    Effects of heat pump systems on groundwater •    Economic effects of aquifer recharge •    Managing conflicts in context of aquifer usage All articles are fully referenced at the end of this issue of the Notes and can be accessed online. In addition this issue of the Quarterly Notes on Sust...

reprint A major new Deutsche Bank report has predicted that energy storage – the “missing link of solar adoption” – will be cheap enough – and technologically ready – to be deployed on a large-scale within the next five years. The solar industry report, published on Friday, said that while costs for the greater majority of available battery technologies remained prohibitive, economically competitive batteries were the “killer app” and the “holy grail” of solar penetration. But with many costs already lower than published literature would suggest, Deutsche Bank believes this ultimate solar and renewable energy goal might not be far out of reach. “Using conservative assumptions and no incentives, our model indicates that the incremental cost of storage will decrease from ~14c/kWh today to ~2c/kWh within the next five years,” the report says. “When overall system cost decreases are considered, we believe solar + batteries will be a clear financial choice in ma...