Climate change concerns coupled with high oil prices and increasing government support are driving increasing rates of investment in the sustainable energy industries, according to a trend analysis from the United Nations Environment Programme. According to UNEP, global investment in sustainable energy in 2007 was higher than previous levels, with $148 billion of new money raised in 2007, an increase of 60% over 2006. Total financial transactions in sustainable energy, including acquisition activity, was $204 billion.
A concentrated photovoltaic thermal hybrid (CPVT) system is similar to a PVT system. It uses concentrated photovoltaics (CPV) instead of conventional PV technology, and combines it with a solar thermal collector.
A renewable resource is a resource which can be used repeatedly and replaced naturally. They can only be reused if managed properly. Examples include oxygen, fresh water, solar energy and biomass. New resources may include goods or commodities such as wood, paper and leather.
Jan. 24, 2018 — A new EU regulation aims to shrink the environmental footprint of biofuels starting in 2021. But a scientist thinks we should go one step further and take into account all compounds produced at … read more
Renewable energy already supports thousands of jobs in the United States. In 2016, the wind energy industry directly employed over 100,000 full-time-equivalent employees in a variety of capacities, including manufacturing, project development, construction and turbine installation, operations and maintenance, transportation and logistics, and financial, legal, and consulting services . More than 500 factories in the United States manufacture parts for wind turbines, and wind power project installations in 2016 alone represented $13.0 billion in investments .
Switching to green power means that electricity providers make it possible for customers to purchase green power from their power company if they pay extra for it. In theory, what this means is that instead of using normal electricity which comes from many non-renewable sources, the provider of the electricity ensures that the equivalent electricity used in your home is fed to the grid via a renewable source, such as solar arrays or wind turbines. However, in the past there has been instances of fraud involved in such schemes.
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!
A hybrid system combines (C)PV and CSP with one another or with other forms of generation such as diesel, wind and biogas. The combined form of generation may enable the system to modulate power output as a function of demand or at least reduce the fluctuating nature of solar power and the consumption of non renewable fuel. Hybrid systems are most often found on islands.
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
Energy engineering Oil refinery Fossil-fuel power station Cogeneration Integrated gasification combined cycle Nuclear power Nuclear power plant Radioisotope thermoelectric generator Solar power Photovoltaic system Concentrated solar power Solar thermal energy Solar power tower Solar furnace Wind power Wind farm High-altitude wind power Hydropower Hydroelectricity Wave farm Tidal power Biomass Geothermal power
Solar power includes plants with among the lowest water consumption per unit of electricity (photovoltaic), and also power soalr energy with among the highest water consumption (concentrating solar power with wet-cooling systems).
Federal, state, and local governments and electric utilities encourage investing in and using renewable energy, and in some cases, require it. Many programs and incentives are currently available. The Database of State Incentives for Renewable Energy and Efficiency (DSIRE) is a comprehensive source of information on the types and the status of government and utility requirements and incentives for renewable energy.
Solar electricity can supplement your entire or partial energy consumption. Using solar power means reducing your energy bills and saving money. Low maintenance and unobtrusive, installing solar panels adds value to your home.
Some photovoltaic systems, such as rooftop installations, can supply power directly to an electricity user. In these cases, the installation can be competitive when the output cost matches the price at which the user pays for his electricity consumption. This situation is sometimes called ‘retail grid parity’, ‘socket parity’ or ‘dynamic grid parity’. Research carried out by UN-Energy in 2012 suggests areas of sunny countries with high electricity prices, such as Italy, Spain and Australia, and areas using diesel generators, have reached retail grid parity.
When those states need more electricity than they are producing, they pay California for the power. But California has excess power on a growing number of days when neighboring states don’t need it, so California has to pay them to take it. CAISO calls that “negative pricing.”
In February 2011, the U.S. Department of Energy (DOE) launched its SunShot initiative, a collaborative national effort to cut the total cost of photovoltaic solar energy systems by 75% by 2020. Reaching this goal would make unsubsidized solar energy cost-competitive with other forms of electricity and get grid parity . The SunShot initiative included a crowdsourced innovation program run in partnership with Topcoder, during which 17 different solar energy application solutions were developed in 60 days. In 2011, the price was $4/W, and the SunShot goal of $1/W by 2020 was reached in 2017.
We’ve been living off grid with solar power for over a year now and while we are grateful to have the ability to turn sunshine into power, we want to share OUR reality of what having solar power has been like. This isn’t everyone’s experience, but it’s our experience since we’re trying to tip-toe into solar and trying to make do with what we have. All we really want to share is that with some systems, it’s a constant job to make sure things are running properly and when there’s a problem, it’s not always immediately obvious what the problem is.
Aurora Solar has been researching what makes solar sales proposals successful. The company interviewed homeowners at different stages of the buying process and talked with solar sales professionals to gain insights into the solar sales process. In this Solar Speaks podcast, we talk with Rahul Nihala…
The common features of passive solar architecture are orientation relative to the Sun, compact proportion (a low surface area to volume ratio), selective shading (overhangs) and thermal mass. When these features are tailored to the local climate and environment they can produce well-lit spaces that stay in a comfortable temperature range. Socrates’ Megaron House is a classic example of passive solar design. The most recent approaches to solar design use computer modeling tying together solar lighting, heating and ventilation systems in an integrated solar design package. Active solar equipment such as pumps, fans and switchable windows can complement passive design and improve system performance.
Solar energy is the cleanest and most abundant renewable energy source available, and the U.S. has some of the richest solar resources in the world. Modern technology can harness this energy for a variety of uses, including generating electricity, providing light or a comfortable interior environment, and heating water for domestic, commercial, or industrial use.
^ John Macknick and others, A Review of Operational Water Consumption and Withdrawal Factors for Electricity Generating Technologies, National Renewable Energy Laboratory, Technical Report NREL/TP-6A20-50900.
Flexible thin film cells and modules are created on the same production line by depositing the photoactive layer and other necessary layers on a flexible substrate. If the substrate is an insulator (e.g. polyester or polyimide film) then monolithic integration can be used. If it is a conductor then another technique for electrical connection must be used. The cells are assembled into modules by laminating them to a transparent colourless fluoropolymer on the front side (typically ETFE or FEP) and a polymer suitable for bonding to the final substrate on the other side.