Hydrogen and fuel cells. These are also not strictly renewable energy resources but are very abundant in availability and are very low in pollution when utilized. Hydrogen can be burned as a fuel, typically in a vehicle, with only water as the combustion product. This clean burning fuel can mean a significant reduction of pollution in cities. Or the hydrogen can be used in fuel cells, which are similar to batteries, to power an electric motor. In either case significant production of hydrogen requires abundant power. Due to the need for energy to produce the initial hydrogen gas, the result is the relocation of pollution from the cities to the power plants. There are several promising methods to produce hydrogen, such as solar power, that may alter this picture drastically.
Renewable portfolio standards (RPS), also referred to as renewable electricity standards (RES), are policies designed to increase the use of renewable energy sources for electricity generation. These policies require or encourage electricity suppliers to provide their customers with a stated minimum share of electricity from eligible renewable resources. Although national RPS or other clean energy policies have been proposed, no federal RPS or similar policy is currently in place. However, most states have enacted their own RPS programs.
Thrilling, I know. The thing to remember is that it is in a utility’s financial interest to generate (or buy) and deliver as much power as possible. The higher the demand, the higher the investments, the higher the utility shareholder profits. In short, all things being equal, utilities want to sell more power. (All things are occasionally not equal, but we’ll leave those complications aside for now.)
First- and second-generation technologies have entered the markets, and third-generation technologies heavily depend on long term research and development commitments, where the public sector has a role to play.
Wholesale Solar designs complete home power systems for all areas of the country and at all price levels. Having lived with solar, both off-grid and grid-tied, we know you will be happiest with your renewable energy system if it is sized exactly to your needs.
The energy payback time (EPBT) of a power generating system is the time required to generate as much energy as is consumed during production and lifetime operation of the system. Due to improving production technologies the payback time has been decreasing constantly since the introduction of PV systems in the energy market. In 2000 the energy payback time of PV systems was estimated as 8 to 11 years and in 2006 this was estimated to be 1.5 to 3.5 years for crystalline silicon silicon PV systems and 1–1.5 years for thin film technologies (S. Europe). These figures fell to 0.75–3.5 years in 2013, with an average of about 2 years for crystalline silicon PV and CIS systems.
Homes, businesses, community groups and schools are being encouraged to install solar power through various incentives such as grants, rebates and feed in tariffs that pay system owners for the electricity they produce.
We design and sell solar panel systems for projects large and small, for homeowners and do-it-yourselfers, contractors, installers, electricians, and developers. Call one of our experienced solar design techs to talk about your project at 1-800-472-1142. If you have your most recent electric bill handy, we’ll be able to get started with the design process right away.
If you are vision-impaired or have some other disability under the Americans with Disabilities Act or a similar law, and you wish to discuss potential accommodations related to shopping or ordering on or using the benefits of our website, please contact Alliant Energy at 1-800-ALLIANT (800-255-4268).
Hydropower—Hydropower is electricity produced from flowing water. Most hydropower produced in the United States is from large facilities built by the federal government, such as the Grand Coulee Dam on the Columbia River in Washington state—the largest single U.S. electric power facility. There are two general types of hydropower:
Auto Restart The Nomad 14 Plus features an auto restart that’s smarter than anything else on the market. With the ability to track power flow history, the Nomad 14 Plus knows the difference between a device that has reached a fully charged state and one that disconnects due to environmental causes, i.e. lack of sunlight, shadow, etc. When the latter is detected, the Nomad 14 Plus will automatically reconnect the charging device, no extra work on your part is needed.
From the end of 2004, worldwide renewable energy capacity grew at rates of 10–60% annually for many technologies. In 2015 global investment in renewables rose 5% to $285.9 billion, breaking the previous record of $278.5 billion in 2011. 2015 was also the first year that saw renewables, excluding large hydro, account for the majority of all new power capacity (134 GW, making up 53.6% of the total). Of the renewables total, wind accounted for 72 GW and solar photovoltaics 56 GW; both record-breaking numbers and sharply up from 2014 figures (49 GW and 45 GW respectively). In financial terms, solar made up 56% of total new investment and wind accounted for 38%.
The first three are active solar systems, which use mechanical or electrical devices that convert the sun’s heat or light to another form of usable energy. Passive solar buildings are designed and oriented to collect, store, and distribute the heat energy from sunlight to maintain the comfort of the occupants without the use of moving parts or electronics.
For solar installers most familiar with comp shingle or tile roofs, encountering a metal roof can be challenging. Besides just the many different types of metal, there are also different metal roofing systems. If the structure has a standing seam roof, solar installation is somewhat easier. Panel mounts clamp to the seam without penetrations. Trapezoidal…
Within emerging economies, Brazil comes second to China in terms of clean energy investments. Supported by strong energy policies, Brazil has one of the world’s highest biomass and small-hydro power capacities and is poised for significant growth in wind energy investment. The cumulative investment potential in Brazil from 2010 to 2020 is projected as $67 billion.
The Coleman 18-Watt Solar Battery Charging Kit comes The Coleman 18-Watt Solar Battery Charging Kit comes with a 7 Amp charge controller and is ideal for charging 12-Volt batteries of cars RVs boats tractors ATVs electric fences and deer feeders. The kit’s amorphous solar panel is operational in all weather. Complete unit includes: alligator clamps charge controller wire … More + Product Details Close
Biodiversity Bioprospecting Biosphere Bushfood Bushmeat Fisheries law management Food Forests genetic resources law management Game law Gene bank Herbalist plants Marine conservation Non-timber forest products Rangeland Seed bank Wildlife conservation management Wood
Renewable energy technologies encompass a broad, diverse array of technologies, including solar photovoltaics, solar thermal power plants and heating/cooling systems, wind farms, hydroelectricity, geothermal power plants, and ocean power systems and the use of biomass.
Photovoltaics were initially solely used as a source of electricity for small and medium-sized applications, from the calculator powered by a single solar cell to remote homes powered by an off-grid rooftop PV system. Commercial concentrated solar power plants were first developed in the 1980s. The 392 MW Ivanpah installation is the largest concentrating solar power plant in the world, located in the Mojave Desert of California.
Take the example of electric cars. A car stores enough electricity to power a house for anywhere from half a day to several days, depending on the size of the battery pack. And it has sophisticated power electronics that can control the timing and vary the rate of charging, which could offer a way to match fluctuating wind power to electricity demand. With small modifications, the cars’ batteries can deliver stored power to a home and to the power grid. There aren’t many electric cars now, but that could easily change in the decades it will take before renewable energy makes up more than 30 or 40 percent of the electricity supply (wind supplies 4 percent now, and solar less than 1 percent).
At Solar Energy International (SEI) we are committed to providing the best possible education in renewable energy, which is why our curriculum is frequently updated by our team of IREC (Interstate Renewable Energy Council) certified instructors to always be at the forefront of the industry. Our free online course RE100: Introduction to Renewable Energy covers the […]
Some consumers choose green energy tariffs because it encourages suppliers to reduce their reliance on fossil fuels, reduce their carbon footprint and reduce their impact on the environment. However, because all electricity is supplied by the National Grid regardless of how it’s made, there’s no real way to ensure that the energy you pay for is actually green.
Off-grid PV systems have traditionally used rechargeable batteries to store excess electricity. With grid-tied systems, excess electricity can be sent to the transmission grid, while standard grid electricity can be used to meet shortfalls. Net metering programs give household systems a credit for any electricity they deliver to the grid. This is handled by ‘rolling back’ the meter whenever the home produces more electricity than it consumes. If the net electricity use is below zero, the utility then rolls over the kilowatt hour credit to the next month. Other approaches involve the use of two meters, to measure electricity consumed vs. electricity produced. This is less common due to the increased installation cost of the second meter. Most standard meters accurately measure in both directions, making a second meter unnecessary.
Renewable energy is derived from natural processes that are replenished constantly. In its various forms, it derives directly from the sun, or from heat generated deep within the earth. Included in the definition is electricity and heat generated from solar, wind, ocean, hydropower, biomass, geothermal resources, and biofuels and hydrogen derived from renewable resources.
Growing up, I lived for a time in the Philippines, where I knew people who lit their tiny homes with single lantern batteries or struggled to breathe through the dense diesel fumes of Manila, so I have a feel for the pressing need around the world for both cheap energy and clean energy.
The Desert Sunlight Solar Farm is a 550 MW power plant in Riverside County, California, that uses thin-film CdTe-modules made by First Solar. As of November 2014, the 550 megawatt Topaz Solar Farm was the largest photovoltaic power plant in the world. This was surpassed by the 579 MW Solar Star complex. The current largest photovoltaic power station in the world is Longyangxia Dam Solar Park, in Gonghe County, Qinghai, China.
Businesses and industry also use these technologies to diversify their energy sources, improve efficiency, and save money. Solar photovoltaic and concentrating solar power technologies are also being used by developers and utilities to produce electricity on a massive scale to power cities and small towns. Learn more about the following solar technologies:
As the primary source of biofuels in North America, many organizations are conducting research in the area of ethanol production. On the Federal level, the USDA conducts a large amount of research regarding ethanol production in the United States. Much of this research is targeted toward the effect of ethanol production on domestic food markets. The National Renewable Energy Laboratory has conducted various ethanol research projects, mainly in the area of cellulosic ethanol. Cellulosic ethanol has many benefits over traditional corn based-ethanol. It does not take away or directly conflict with the food supply because it is produced from wood, grasses, or non-edible parts of plants. Moreover, some studies have shown cellulosic ethanol to be more cost effective and economically sustainable than corn-based ethanol. Sandia National Laboratories conducts in-house cellulosic ethanol research and is also a member of the Joint BioEnergy Institute (JBEI), a research institute founded by the United States Department of Energy with the goal of developing cellulosic biofuels.
If you think 100% renewable energy will never happen, think again. Several countries have adopted ambitious plan to obtain their power from renewable energy. These countries are not only accelerating RE installations but are also integrating RE into their existing infrastructure to reach a 100% RE mix. Read our article..
When it comes to renewable energy, China is, in many ways, striking out on its own. According to the International Energy Agency, new solar photovoltaic capacity grew by 50 percent in 2016. China alone accounted for nearly half that expansion. In the wind energy sector, China installed a staggering 23.4 gigawatts of new capacity in 2016, according to the Global Wind Energy Council.
Climate change and global warming concerns, coupled with high oil prices, peak oil, and increasing government support, are driving increasing renewable energy legislation, incentives and commercialization. New government spending, regulation and policies helped the industry weather the global financial crisis better than many other sectors. According to a 2011 projection by the International Energy Agency, solar power generators may produce most of the world’s electricity within 50 years, reducing the emissions of greenhouse gases that harm the environment.
The array of a photovoltaic power system, or PV system, produces direct current (DC) power which fluctuates with the sunlight’s intensity. For practical use this usually requires conversion to certain desired voltages or alternating current (AC), through the use of inverters. Multiple solar cells are connected inside modules. Modules are wired together to form arrays, then tied to an inverter, which produces power at the desired voltage, and for AC, the desired frequency/phase.
Some of the largest https://www.youtube.com/edit?o=U&video_id=ej0QiPC3jfI thermal power plants in the United States are in the south-west of the country. Solar Energy Generating Systems (SEGS) is the name given to nine solar power plants in the Mojave Desert commissioned between 1984 and 1991. The installation uses parabolic trough solar thermal technology along with natural gas to generate electricity. The facility has a total of 400,000 mirrors and covers 1,000 acres (4 km²). The plants have a total generating capacity of 354 MW.
 Intergovernmental Panel on Climate Change (IPCC). 2011. IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation. Prepared by Working Group III of the Intergovernmental Panel on Climate Change [O. Edenhofer, R. Pichs-Madruga, Y. Sokona, K. Seyboth, P. Matschoss, S. Kadner, T. Zwickel, P. Eickemeier, G. Hansen, S. Schlömer, C. von Stechow (eds)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 1075 pp. (Chapter 9).