^ Kang, J.; Von Hippel, F. N. (2001). “U‐232 and the proliferation‐resistance of U‐233 in spent fuel”. Science & Global Security. 9: 1. doi:10.1080/08929880108426485. “Archived copy” (PDF). Archived from the original (PDF) on 3 December 2014. Retrieved 2 March 2015.
Feb. 5, 2018 — An international team of researchers has discovered a new quantitative relation that allows for quick identification of promising material combinations for organic solar cells. The discovery could … read more
At the end of 2016, the United States had 19.77 gigawatts (GW) of installed photovoltaic capacity. The country pioneered solar farms and many key developments in photovoltaics came out of national research.
The Solar America Initiative (SAI) is a part of the Federal Advanced Energy Initiative to accelerate the development of advanced photovoltaic materials with the goal of making it cost-competitive with other forms of renewable electricity by 2015.
The DOE and other federal government agencies, fund research and development of renewable energy technologies. Most of the research and development is carried out at the National Labs and in cooperation with academic institutions and private companies. The availability of these programs depends on annual appropriations from the United States Congress.
Removable Kickstands and Carrying Case Included Features adjustable kickstands for easy positioning, and built-in handle for easy carrying. Also includes a canvas bag for more protection during transport or storage.
By powering millions of homes and businesses, renewable energy is reducing the threat of climate change and making the air safer to breathe. Wind farms have become a familiar part of the landscape, and solar panels have spread across rooftops nationwide. Yet we have only begun to tap the potential of clean energy alternatives.
One implication of all this — a poorly understood implication — is that rooftop solar fucks up the utility model even at relatively low penetrations, because it goes straight at utilities’ main profit centers. (It’s already happening in Germany.) Right now, distributed solar PV is a relatively tiny slice of U.S. electricity, less than 1 percent. For that reason, utility investors aren’t paying much attention. “Despite the risks that a rapidly growing level of DER penetration and other disruptive challenges may impose,” EEI writes, “they are not currently being discussed by the investment community and factored into the valuation calculus reflected in the capital markets.” But that 1 percent is concentrated in a small handful of utility districts, so trouble, at least for that first set of utilities, is just over the horizon. Utility investors are sleepwalking into a maelstrom.
In a solar electric system that is also tied to the utility grid, the DC power from the solar array is converted into 120/240 volt AC power and fed directly into the utility power distribution system of the building. The power is “net metered,” which means it reduces demand for power from the utility when the solar array is generating electricity – thus lowering the utility bill. These grid-tied systems automatically shut off if utility power goes offline, protecting workers from power being back fed into the grid during an outage. These types of solar-powered electric systems are known as “on grid” or “battery-less” and make up approximately 98% of the solar power systems being installed today.
Over $1 billion of federal money has been spent on the research and development of hydrogen fuel in the United States. Both the National Renewable Energy Laboratory and Sandia National Laboratories have departments dedicated to hydrogen research.
About half of all growth in U.S. renewable electricity generation and generation capacity since 2000 is associated with state RPS requirements. Most states with RPS are meeting or exceeding their RPS requirements with renewable generation from qualifying RPS generation sources or purchases of RECs. Details on the status of compliance with state RPS in 2017 are available in the report U.S. Renewables Portfolio Standards: 2017 Annual Status Report
Dropping costs, as well as concerns like global warming and air pollution, have triggered massive growth in the solar energy industry. I’m going to focus on U.S. solar energy industry growth here, but the trends are similar globally and in other major economies, like China, Germany, the UK, Spain, and many other countries.
Jump up ^ Timmer, John (25 September 2013). “Cost of renewable energy’s variability is dwarfed by the savings: Wear and tear on equipment costs millions, but fuel savings are worth billions”. Ars Technica. Condé Nast. Retrieved 26 September 2013.
People have used the sun as a heat source for thousands of years. Families in ancient Greece built their homes to get the most sunlight during the cold winter months. In the 1830s, explorer John Herschel used a solar collector to cook food during an adventure in Africa. You can even try this at home!
Bloomberg Energy Finance forecasts 22 percent compound annual growth in all solar PV, which means that by 2020 distributed solar (which will account for about 15 percent of total PV) could reach up to 10 percent of load in certain areas. If that happens, well:
An electric aircraft is an aircraft that runs on electric motors rather than internal combustion engines, with electricity coming from fuel cells, solar cells, ultracapacitors, power beaming, or batteries.
The term solar panels is often used for a few different types of products that produce energy by collecting sunlight. We most commonly use the phrase to refer to the type that converts sunlight directly into DC electricity. Less frequently, people will use the term in reference to solar thermal collectors, which typically heats a liquid such as water, or solar air heaters, which heats air directly.
Tethys is an online knowledge management system that provides the marine and hydrokinetic energy (MHK) and offshore wind (OSW) communities with access to information and scientific literature on environmental effects of MHK and OSW developments.
Rebate In order to encourage the use of solar power, many utilities and local non-profit agencies offer rebates after the installation of a solar electric system. Usually the rebates are simply based on the number of Watts of solar panels installed. Please consult your local Utility Company for details.
Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered a plentiful resource, the exceptions highlight the importance of solar energy to agriculture. During the short growing seasons of the Little Ice Age, French and English farmers employed fruit walls to maximize the collection of solar energy. These walls acted as thermal masses and accelerated ripening by keeping plants warm. Early fruit walls were built perpendicular to the ground and facing south, but over time, sloping walls were developed to make better use of sunlight. In 1699, Nicolas Fatio de Duillier even suggested using a tracking mechanism which could pivot to follow the Sun. Applications of solar energy in agriculture aside from growing crops include pumping water, drying crops, brooding chicks and drying chicken manure. More recently the technology has been embraced by vintners, who use the energy generated by solar panels to power grape presses.
Jump up ^ Duchane, Dave; Brown, Don (December 2002). “Hot Dry Rock (HDR) Geothermal Energy Research and Development at Fenton Hill, New Mexico” (PDF). Geo-Heat Centre Quarterly Bulletin. 23 (4). Klamath Falls, Oregon: Oregon Institute of Technology. pp. 13–19. ISSN 0276-1084. Retrieved 5 May 2009.
Jump up ^ Sørensen, Bent (1975). “A plan is outlined according to which solar and wind energy would supply Denmark’s needs by the year 2050”. Science. 189 (4199): 255–260. Bibcode:1975Sci…189..255S. doi:10.1126/science.189.4199.255. PMID 17813696.
^ Li, Wei; Rubin, Tzameret H.; Onyina, Paul A. (2013-05-01). “Comparing Solar Water Heater Popularization Policies in China, Israel and Australia: The Roles of Governments in Adopting Green Innovations”. Sustainable Development. 21 (3): 160–170. doi:10.1002/sd.1547. ISSN 1099-1719.
^ Del Chiaro, Bernadette; Telleen-Lawton, Timothy. “Solar Water Heating (How California Can Reduce Its Dependence on Natural Gas)” (PDF). Environment California Research and Policy Center. Archived from the original (PDF) on 27 September 2007. Retrieved 29 September 2007.
Carbon offset Cost of electricity by source Ecotax Energy subsidies Feed-in tariff Fossil-fuel phase-out Net metering Pigovian tax Renewable Energy Certificates Renewable energy payments Renewable energy policy Spark/Dark/Quark/Bark spread
Human activity is overloading our atmosphere with carbon dioxide and other global warming emissions. These gases act like a blanket, trapping heat. The result is a web of significant and harmful impacts, from stronger, more frequent storms, to drought, sea level rise, and extinction.
Molten salt can be employed as a thermal energy storage method to retain thermal energy collected by a solar tower or solar trough of a concentrated solar power plant, so that it can be used to generate electricity in bad weather or at night. It was demonstrated in the Solar Two project from 1995–1999. The system is predicted to have an annual efficiency of 99%, a reference to the energy retained by storing heat before turning it into electricity, versus converting heat directly into electricity. The molten salt mixtures vary. The most extended mixture contains sodium nitrate, potassium nitrate and calcium nitrate. It is non-flammable and nontoxic, and has already been used in the chemical and metals industries as a heat-transport fluid, so experience with such systems exists in non-solar applications.
Feb. 1, 2018 — Researchers have found a way to more efficiently generate hydrogen from water – an important key to making clean https://www.youtube.com/edit?o=U&video_id=rL-8JDGk1Ps more viable. Using inexpensive nickel and iron, the … read more
Solar Recharge Goal Zero Yeti Portable Power Stations Pairs best with Goal Zero Yeti 1000 Portable Power Stations and above, the Boulder 200 is a convenient way to transport a large amount of solar in one, easy-to-pack form. Comes with an Anderson Power Pole connector engineered to withstand higher wattage safely.