U.S. wind power enjoys a rebirth as solar's obstacles mount

Nichola Groom for Reuters:  A year after Congress extended generous tax credits for renewable energy projects, the U.S. wind industry is thriving.

Solar power companies, meanwhile, are hunkering down for a rough 2017.

The tax credit renewal has boosted the long-term outlooks for both industries. But in the short term, the subsidies are far more attractive for wind power, which has spurred utilities to launch wind projects while they scale back or delay solar installations.

Advances in wind turbine technology are also opening up new locations for development and driving a wave of spending to upgrade existing projects.

In the last few weeks, power companies with large renewable holdings - including Southern Co, NextEra Energy Inc and Xcel Energy Inc - have announced plans to invest billions of dollars in wind.

"We're making a pivot now away from solar," Southern Chief Executive Tom Fanning told a meeting with Wall Street analysts in October.  Cont'd...

Science Plant a Wind Tree in your neighborhood to generate energy from low-speed wind

Bruce Brown for Digital Trends:  These trees do more than just add ambiance. Harnessing the wind to generate electrical energy usually brings to mind thoughts of huge land- or ocean-based wind farms consisting of huge towers with two or three blades, each more than 100-feet long, on the top. The size, weight, noise, and vibration of industrial wind turbines restrict their use to large open spaces. Newwind, a French startup, has developed a much smaller, urban-space-friendly “Wind Tree,” reports Electrek.

The Wind Tree, which produces sufficient energy to power small buildings or streetlights, is designed to connect to a nearby energy storage system. The trees are each about 30 feet tall and 26 feet in diameter, and weigh approximately 5,500 pounds. Each tree has 54 Aeroleafs mounted vertically on tree branches. The Aeroleafs are 3.2 feet high and, spinning at optimum speed, are capable of generating 65 watts each. So, a tree with 54 leaves has an energy-generation capacity maximum of 3,510 watts (3.5kW), about the same as a small home solar installation.  Cont'd...

How to Manage Snow on Solar

The snow melting on your panels actually acts as a lubricant between the snow mass and the panel surface, which makes the solar panel a completely frictionless, slick surface that's the perfect candidate to allow that snow mass to come barreling off your roof.

The Solar Industry Has Paid Off Its Carbon Debts

Robinson Meyer for The Atlantic:  Think of all the energy that goes into making a single solar panel. Quartz and copper must be mined. The raw materials must be converted into wafers, then encased in protective material. And after panels leave the factory, they must be shipped all over the world.

Now imagine these consequences spread over four decades—the environmental cost of the solar industry. Given all the research, development, and production time that goes into making any one panel, a skeptical solar-buyer might wonder: Has the solar industry on the whole really saved any energy at all?  To that concern, a new analysis answers: Yes.

The solar industry probably paid off its long-term energy and climate “debts” in 2011, a study published this week in Nature Communications finds.  Cont'd...

Small Power, Big Grid: Part 5

The Emerging Relationship between Distributed Energy Resources and the Transmission System

Nearly half of residential distributed solar power is owned by private companies

Lucas Mearian for ComputerWorld:  About 44% of all solar power that's installed on residential rooftops, known as distributed solar capacity, is owned by private businesses, such as SolarCity or Vivint Solar, according to new government data.

Distributed solar capacity in the U.S., which includes all solar power capacity other than utility-scale installations 1 megawatts (MW) or larger,  increased to 12.3 gigawatts (GW) as of September, according to new figures from the Energy Information Administration (EIA). In comparison, a cumulative 11.6GW had been installed in the U.S. by the end of 2015.  Cont'd...

Glow-in-the-dark dye could fuel liquid-based batteries

Charlotte Hsu for University of Buffalo:  BUFFALO, N.Y. — Could a glow-in-the-dark dye be the next advancement in energy storage technology?  Scientists at the University at Buffalo think so.

They have identified a fluorescent dye called BODIPY as an ideal material for stockpiling energy in rechargeable, liquid-based batteries that could one day power cars and homes.  BODIPY — short for boron-dipyrromethene — shines brightly in the dark under a black light.

But the traits that facilitate energy storage are less visible. According to new research, the dye has unusual chemical properties that enable it to excel at two key tasks: storing electrons and participating in electron transfer. Batteries must perform these functions to save and deliver energy, and BODIPY is very good at them.  In experiments, a BODIPY-based test battery operated efficiently and with longevity, running well after researchers drained and recharged it 100 times.  Cont'd...

Microgrids and the Future of Decentralized Power

UL works with industry leaders to develop a new standard for microgrids, blending in-lab product testing with on-site field evaluations.

Arcadia's Community Solar Program

A customer can subscribe to as little as single panel or enough to zero-out their utility bill.

Solar and Renewable Energy Trends in 2017

The global transportation fleet is turning electric faster than anyone could have imagined only a year ago.

Using Geographic Information Systems to find Solar Sites

GIS technology allows us to query, analyze and visualize information in an incredible number of ways, and as with all technology these days it is evolving rapidly.

DOE energy innovation hub backs two key future battery technologies

Nick Flaherty for EE Times:  After four years of evaluation, the Joint Center for Energy Storage Research (Chicago, IL) is backing two key technologies for the future of battery systems.

The Center was set up four years ago with a five year remit to explore new battery technology for transportation and the electricity grid that, when scaled to commercial production, are capable of delivering five times the energy density at one-fifth the cost of commercial batteries available in 2011.

The Center has investigated 1,500 compounds for electrodes and 21,000 organic molecules relevant for liquid electrolytes as well as filing 52 invention disclosures and 27 patent applications, says director George Crabtree. Five techno-economic models created by JCESR for designing virtual batteries on the computer are being used to evaluate the best pathways for beyond-lithium-ion systems to reach 400 watt hours per kilogram (400 Wh/kg) and $100 per kilowatt hour ($100/kWh).  Cont'd...

How Flushing your Toilet could help create Biofuel

Laura A. Shepard for Popular Science:  Picture a giant toilet bowl looming larger than life outside the UN headquarters in New York. It sounds like an absurd scene, but the stunt from three years ago was not a childish prank. It was a serious statement to mark the first World Toilet Day and raise awareness of the fact that one third of the world’s population lacks access to toilets.
Addressing the global sanitation crisis is a top priority among the UN’s Sustainable Development Goals, and it now has an exciting solution.
In fact, science may soon make your toilet bowl a viable alternative energy source. Your flushes can produce two or three gallons of biofuel per year when the wastewater is treated using a process, developed scientists and engineers at the Department of Energy’s Pacific Northwest National Laboratory, called hydro-thermal liquefaction (HTL).

HTL emulates the way crude oil forms naturally, when biomass decays under high pressure and heat for millions of years — but it only takes 45 minutes.  Cont'd...

Small Power, Big Grid, Part 4: DERs AND WHOLESALE MARKETS

The Emerging Relationship between Distributed Energy Resources and the Transmission System.

The Importance of Fuel Flexibility

Many companies don't realize that they can generate their own power on-site and in a cleaner and more cost-effective way.

Records 61 to 75 of 3074

First | Previous | Next | Last

Featured Product

Tile Replacement Mount from Quick Mount PV

Tile Replacement Mount from Quick Mount PV

The Tile Replacement Mount provides a fast and easy way to install solar on tile roofs while protecting against water intrusion. Simply remove the tile and replace it with the Tile Replacement Mount. Works with all standard curved and flat tile roofs, and all standard rail-based racking systems. Flashed at both the deck and top levels, the mount is fully engineered to meet code requirements and industry best practices. The Tile Replacement Mount features Quick Mount PV's patented Elevated Water Seal technology for optimal waterproofing. Get a free sample and see for yourself!