Arctic sea ice shrinks to lowest ever level


As global warming intensifies, sea ice in the Arctic has shrunk to its smallest surface area since record-keeping began, US scientists have warned. The National Snow and Ice Data Center (NSIDC) on Wednesday said satellite images showed the ice cap has melted to 3.4 million square kilometres as of September 16, the predicted lowest point for the year. That is the smallest Arctic ice cover since record-keeping began in 1979.

"We are now in uncharted territory," NSIDC director Mark Serreze said in a statement. "While we've long known that as the planet warms up, changes would be seen first and be most pronounced in the Arctic, few of us were prepared for how rapidly the changes would actually occur."

Arctic Sea ice expands and contracts seasonally, with the lowest extent usually occurring in September. This year's minimum followed a season already full of records for shrinking ice, with the lowest ever extents recorded on August 26 and again on September 4.

Liquid Solar Cells - Solar Ink


Scientists at the University of Southern California have developed new solar cells in the form of a liquid that can be painted or printed onto clear surfaces. The new technology is cheap to produce and relies on stable solar nanocrystals that are only four nanometers in size, which is so small you could fit 250 billion on the head of a pin. These particles are then suspended in liquid like pigment and can be printed like ink.

The liquid solar cell technology can be implemented under a low-temperature process, which means that it can be printed on plastic instead of glass without concern of the plastic melting. This would allow for cheap, flexible solar panels and more options in applying the solar technology.

Although the new liquid solar nanocrystals are cheaper than traditional single-crystal silicon wafer solar cells to produce, they are also much less efficient. In order to keep the particles stable, organic ligand molecules are used to attach to the nanocrystals to keep them from clumping, but in effect, also insulates them and reduces their conductivity.

Additionally, the current nanocrystals used are made of the semiconductor cadmium selenide, which is considered toxic and is restricted in commercial applications. The researchers are still working on alternative materials for the nanocrystals. Hence, it will still be a few years before we see this technology in commercial use.

Solar Electricity Basics

As a PV designer and installer, you should be perfectly familiar with the following basic electricity concepts:
 
Current is the flow of electrons through a conductor (wire). The SI unit of current is ampere (A).

Ampere represents a flow or rate of electrons movement.
The base unit of ampere is coulombs per second.
In Direct Current (DC) electrons flow in one direction.

In Alternating Current (AC) electrons flow in a back-and-forth pattern.

AC differs from DC mainly in the sense that the current/voltage alternates in flow at a specific interval of time.


Load is simply any piece of electrical equipment.

Ammeter are used to measure electrical current (AC and DC both). Two commonly used types of hand-held ammeters are:

  • Inline Ammeter requires current to flow through the meter in order to be measured.
  • Clamp Ammeter have a jaw on the top that opens when you press a lever on the side of the meter. To measure current you have to place conductor inside the jaw.

Voltage is an electrical pressure that encourages electrons to flow in the conductor.

Nominal Voltage is a number that represents a baseline for measuring voltage.

Operating Voltage is the output voltage.

SI units of voltage is Volt (V).

To measure voltage you can use Digital Multimeter (DMM) which is a third type of hand-held measuring device.

Resistance is the opposition of flow of DC current.

Impedance is the opposition of flow of AC current.

SI unit of resistance/impedance is ohms. 

Ohm's Law can be stated as:

 Voltage = Current x Resistance

Power is the measurement of flow of energy. It is a rate and an instantaneous value.

SI unit of power is Watts (W).

One watt is equal to one joule of energy per second. 
1000 Watts = 1 kilowatt (kW).

Energy is the measurement of power multiplied by time.

It is measured in kilowatt-hours (kWh). (It is not SI unit.)

kWh is the number on the basis of that your utility provider charges electricity bill. 


Energy in (kWh) = Power in (kW) x Number of hours (h)

Ampere Hour (Ah) is the unit of electric charge. Ah is commonly used for batteries.


Charge in (Ah) = Current in (A) x Number of hours (h)


1Ah = A x 3600s = C/s x 3600s = 3600C

A collection of 6.24x10e18 electrons has a charge of 1C (one coulomb).

Ampere-hours (Ah) = Watt-hours (Wh) / Voltage (V)

Series connections are made by connecting the positive wire from one module to the negative wire of the next module. In series connection, the voltage values are additive and current values remain the same.

Parallel connections are made by connecting the positive wire from one module to the positive wire from next module and the negative wires are connected together. In parallel connections, the current values are additive and the voltage values remain the same.

Combination of series and parallel connections can be made to obtain the desired value of voltage and current.

Solar Kids and Sun


 
  • Life on earth would not exist without the sun.
  • The sun is the nearest star.
  • The sun's heat creates all of the weather on earth.
  • Energy from the sun is free.

First Solar Power Plant Commissioned in the Provence-Alpes-Côte d’Azur France


On August 21 in the commune of Valderoure, the French subsidiary of the global market leader in photovoltaic system integration, BELECTRIC, officially inaugurated the region's first ground-mounted solar power plant. In the presence of the mayor and several regional politicians, BELECTRIC employees – who were involved in the design and implementation of the power plant – gave the guests a guided tour of the solar power plant as well as information about the performance of the plant and general information on BELECTRIC as a company. The solar power plant with an installed output of 1.86 MWp was erected on an area covering 5.5 ha and is a prime example of the Franco-German cooperation. The 24,000 First Solar modules installed generate an annual power production of approximately 2.8 million kWh, which corresponds to the average annual power consumption of around 600 households, saving the environment almost 2,500 tons of CO₂ per year.

The integration of the solar power plant in the landscape was given top priority. A standing committee with representatives from all the responsible environmental agencies accompanied the project in every construction phase. The open and honest cooperation proved successful in particular during the preparation of the site, which is a sensitive phase in terms of flora and fauna. The positive cooperation will also be an advantage in terms of the educational nature trail that is still to be constructed.  Jochen Meyer, Managing Director of BELECTRIC France, summarized his enthusiasm in one sentence: "This project is an excellent example of the positive cooperation between BELECTRIC's excellent technical, personal, and financial competences and the pronounced desire of the local representatives of the commune to set up an environmentally friendly and sustainable power supply in this region."

Solar energy replaces nuclear energy in Germany



Sun! A star located some 150 million kilometers away is unarguably the most important element for human race as it is their source of life among other vital things. In a latest breakthrough in solar technology, Germany has set an example that cannot be challenged. In late May this year, Germany solar power plants generated a record breaking 22 gigawatts of electricity per hour. This amount of electricity is equal to the power generated by 20 nuclear power plants working at maximum capacity. The 22 gigawatts produced from Germany’s solar plants was utilized throughout the country during midday hours for two consecutive days.

Last year, an unfortunate event that took place in Fukushima, where a great loss of life occurred because of the Nuclear Plant meltdown following the Japan earthquake and Tsunami in March, last year.

After the Fukushima disaster, the German government abandoned their plans to use nuclear power and shut down eight of their 17 nuclear plants immediately and plans to shut down the remaining nine by the year 2022. This move had naturally motivated the German government to look for more practical and renewable energy sources like wind turbines, solar and bio-mass which is basically biological material from living or recently living material which is turned into bio-fuel for energy.

Germany’s director of Institute of the Renewable Energy Industry (IWR), Norbert Allnoch, said that the 22 gigawatts of solar power per hour met almost 50% of the country’s mid-day electricity demands.

“Never before anywhere has a country produced as much photovoltaic electricity,” Allnoch told Reuters. “Germany came close to the 20 gigawatt (GW) mark a few times in recent weeks. But this was the first time we made it over.” he said, while speaking to Reuters. This breakthrough which was supported and funded by the German administration has proved that a full-fledged industrial country was able to keep up with a third of the nation’s energy demand on a working day and half on the weekend, when factories and mills were closed. Germany is now second in the list of countries using renewable energy sources and the leading country in the list of countries using solar technology, followed by Spain which stands at number two.

The solar power generation capacity of Germany is almost equal to the rest of the world combined. It gets about four percent of its overall annual electricity from the sun and it aims to cut its greenhouse gas emissions by 40 percent by the year 2020.

Malta Solar Plans - 2020




Resources Minister George Pullicino today awarded Alberta Photovoltaic Consortium with a letter of intent to install 67,000 square meters, or the area of 15 football pitches, of photovoltaic systems on the rooftops of government buildings in Malta.

“This company won the tendering process after 15 companies expressed interest. This investment will amount to around €20 million and will help Malta towards its 10% target of 2020,” Pullicino said.

The letter of intent was awarded on the eve of the International Renewable Energy Agency (IRENA) conference to be hosted by the Ministry for Resources and Rural Affairs in Malta.

“The conference will see ministers travelling to Malta to discuss renewable energy and islands during this global summit including the Maldives, Seychelles, Jamaica, Samoa and more,” Pullicino said.

The government identified a number of public buildings as sites for solar energy installations by Alberta on behalf of the resources ministry.

“These buildings do not just include ministries and schools, but also the roofs of reservoirs such as four in Ta’ Cenc and three in Ta’ Qali,” the minister explained.  

This project is aimed at producing renewable energy as Malta struggles to reach its target set by the EU renewable energy directive.

Malta's current renewable energy production is still at 0.4% of its gross final energy consumption, ten years ahead of its 2020 target to produce 10% of energy through alternative energy sources.

Until now, Malta is the only member state among the EU27 that still depends totally on fossil fuels to produce all its electricity needs.

Pullicino said that unlike other larger countries, Malta does not have the “luxury” of excessive space where solar or wind farms can be constructed.

“We have to take advantage of what little space we have because apart from the already developed areas, Malta has space which is of agricultural value, aesthetic value and historical value which needs to be conserved,” Pullicino said.

The 2009 Directive on renewable energy set individual targets for all Member States, such that the EU will reach a 20% share of total energy consumption from renewable sources by 2020. These targets take into account the Member States' different starting points, renewable energy potential and economic performance.
Recently, the European Commission sent a reasoned opinion to Malta and three other member states, for not complying with their legal obligation to inform Brussels of their transposition of the Renewable Energy directive.

Increasing the share of renewable energy to 20% in the EU energy consumption by 2020 relies on the commitment of member states to fully implement the requirements of EU legislation.

To reach these targets, member states have to lay down rules, for example for improving the grid access for electricity from renewable energy sources, the administrative and planning procedures, information and training of installers.

Malta’s dependence on oil will be partly reduced by connecting Malta to the European energy grid through an interconnector. A 200-megawatt interconnector will link Malta to Sicily and is set to be operational by 2013.

As for wind energy, the government's original plan presented in 2006 was to exclude near-shore and land-based wind farms in favor of a wind farm located in deep waters for which an international call for expression of interest was issued. But the technology for this kind of development was still at an experimental stage at the time.

After the 2008 election the government changed its policy by opting for a near shore wind farm at Sikka l-Bajda and two smaller land based farms in Hal Far and Bahrija. However, the efficiency and environmental impact of the wind farms are still being assessed.

Obama acceptance speech on renewable energy




From his podium at the Democratic National Convention on Thursday night, President Barack Obama told voters that reelecting him would keep the nation on a path to slash oil imports, boost renewable energy and make cars more efficient.
At the same time, Obama endorsed developing “a hundred-year supply of natural gas that’s right beneath our feet,” reiterating support for the fossil fuel that he expressed in his State of the Union address last January.
Obama used his prime-time address to highlight stark differences between his energy policy and the approach of his Republican challenger, Mitt Romney. He cast the choice as one between embracing a clean energy future that combines natural gas with alternative power sources and a plan wedded to fossil fuels.
“I will not let oil companies write this country’s energy plan or endanger our coastlines or collect another $4 billion in corporate welfare from our taxpayers,” Obama said, making a reference to oil and gas industry tax deductions he has repeatedly asked Congress to spike.
Although Obama’s speech didn’t dwell on climate change — another sign of how the politics of that issue have changed in the past four years — he asserted that his energy policies “will continue to reduce the carbon pollution that is heating our planet.”And he made a jab at Romney’s joke about climate warming on the Republican National Convention stage just a week earlier.
“President Obama promised to begin to slow the rise of the oceans and to heal the planet,” Romney said last week. “My promise is to help you and your family.” In response Thursday night, Obama insisted that “climate change is not a hoax.” He added: “More droughts and floods and wildfires are not a joke.”
Here is an excerpt of Obama’s speech dealing with energy policy:
You can choose the path where we control more of our own energy. After 30 years of inaction, we raised fuel standards so that by the middle of the next decade, cars and trucks will go twice as far on a gallon of gas. We have doubled our use of renewable energy, and thousands of Americans have jobs today building wind turbines and long-lasting batteries. In the last year alone, we cut oil imports by 1 million barrels a day, more than any administration in recent history. And today the United States of America is less dependent on foreign oil than at any time in the last two decades.
So now you have a choice between strategies that reverses this progress or one that builds on it. We’ve opened millions of new acres for oil and gas exploration in the last three years, and we’ll open more. But unlike my opponent, I will not let oil companies write this country’s energy plan or endanger our coastlines or collect another $4 billion in corporate welfare from our taxpayers. We’re offering a better path.
We’re offering a better path where we — a future where we keep investing in wind and solar and clean coal, where farmers and scientists harness new biofuels to power our cars and trucks, where construction workers build homes and factories that waste less energy — where, where we develop a hundred-year supply of natural gas that’s right beneath our feet. If you choose this path, we can cut our oil imports in half by 2020 and support more than 600,000 new jobs in natural gas alone.
And yes, my plan will continue to reduce the carbon pollution that is heating our planet, because climate change is not a hoax. More droughts and floods and wildfires are not a joke. They are a threat to our children’s future.

The Future of Renewable Energy



I watched this video and I didn't stop myself to share it with you. In this video, five sorts of renewable sources are described. This is awesome video. 

National Renewable Energy Laboratory Selects HP and Intel to Provide HPC Cluster



The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) has selected HP and Intel to provide a new energy-efficient high performance computer (HPC) system dedicated to energy systems integration, renewable energy research, and energy efficiency technologies. The new center will provide additional computing resources to support the breadth of research at NREL, leading to increased efficiency and lower costs for research into clean energy technologies including solar photovoltaics, wind energy, electric vehicles, buildings technologies, and renewable fuels.

The $10 million HPC system will reside at the Energy Systems Integration Facility (ESIF), under construction on the Golden, Colorado, campus. The new system will greatly expand NREL’s modeling and simulation capabilities, including advancing materials research and developing a deeper understanding of biological and chemical processes. It will also support research into fully integrated energy systems that would otherwise be too expensive, or even impossible, to study directly. The HPC’s petascale computing capability (1 million billion calculations per second) is the world’s largest computing capability dedicated solely to renewable energy and energy efficiency research.

“This unique capability sets NREL apart in our ability to continue groundbreaking research and analysis,” NREL Director Dan Arvizu said. “In partnership with HP and Intel, NREL is acquiring one of the most energy efficient, high performance computer systems in the world for our research.”

The HPC data center at NREL is designed to be the world’s most energy efficient, with an annualized average power usage effectiveness (PUE) rating of 1.06 or better. The average data center operates with a PUE of 1.91, according to 2009 data from the Environmental Protection Agency’s Energy Star Program. NREL’s data center design is compact, resulting in short runs for both electrical and plumbing components. This project features a technology, currently under development, that uses warm water in the computing rack to efficiently cool the servers.

NREL will maximize the reuse of heat generated by the HPC system. The “waste heat” from the computer system will be used as the primary heat source in the ESIF offices and lab space. Excess heat can also be exported to adjacent buildings and other areas of the NREL campus. All together, the efficiency of the data center, the energy efficiency features of the HPC system and the system’s ability to reuse heat combine to reduce overall energy use. The system is projected to deliver substantial energy savings and avoid significant costs through the efficiency improvements. The project will help the Energy Department implement President Barack Obama’s Executive Order on federal sustainability that set aggressive energy efficiency goals across the federal government.

“The industry is more and more cognizant of the amount of energy being used in our nation’s data centers,” NREL Computational Science Center Director Steve Hammond said. “NREL’s new HPC data center in the ESIF will set the standard for sustainable and energy efficient computing. The data center will have a world-leading PUE and reuse nearly all waste heat generated. Most data centers do only one or the other, not both.”

“NREL needed a system that would deliver on their commitment to energy efficiency while achieving the highest levels of performance for their researchers,” Scott Misage, director, HPC, HP, said. “HP ProLiant servers and innovative water cooled design provide the foundation needed to make this data center one of the most efficient in the world, while reaching petascale performance.”

The HPC system will be deployed in two phases that will include scalable HP ProLiant SL230s and SL250s Generation 8 (Gen8) servers based on eight-core Intel Xeon E5-2670 processors as well as the next generation of servers featuring future 22nm Ivy Bridge architecture based Intel® Xeon® processors and Intel Many Integrated Core architecture based Intel® Xeon Phi™ co-processors. The first phase of the HPC installation will begin in November 2012, reaching petascale capacity in the summer of 2013. HP and Intel were selected after a competitive, open procurement process.

“Research on renewable energy and new energy sources are the areas that are aimed to address humanity’s biggest challenges and will impact literally everyone on the globe. Our collaboration with HP and NREL is also bringing computer architecture and system cooling to accelerate innovation in more efficient use of energy critical for achieving exascale performance by end of the decade,” Stephen Wheat, general manager of High Performance Computing at Intel said. “We are proud to have Intel’s most powerful and energy efficient products as the combination of Intel Xeon processors and Intel Xeon Phi co-processors to help NREL in their efforts.”

Renewable Energy in China - 2016



Research and Markets has announced the addition of the "Renewable Energy in China" report to their offering. 

Renewable Energy in China industry profile provides top-line qualitative and quantitative summary information including: market size (value 2007-11, and forecast to 2016). The profile also contains descriptions of the leading players including key financial metrics and analysis of competitive pressures within the market. Essential resource for top-line data and analysis covering the China renewable energy market. Includes market size data, textual and graphical analysis of market growth trends, leading companies and macroeconomic information.

Highlights

The renewable energy market consists of the net consumption of electricity generated via geothermal, solar, wind and hydroelectric means, as well as through wood and waste combustion. Data are reported as net consumption as opposed to gross consumption. Net consumption excludes the energy consumed by the generating units. The volume of the market is calculated as the volume of electricity consumed (in billions of kilowatt hours, kWh), and the market value has been calculated according to average annual electricity prices. Any currency conversions used in the creation of this report have been calculated using constant 2011 annual average exchange rates.

The Chinese renewable energy market had total revenue of $67.4 billion in 2011, representing a compound annual growth rate (CAGR) of 6.8% between 2007 and 2011.
 
Market consumption volumes increased with a CAGR of 11.2% between 2007-2011, to reach a total of 758 billion kWh in 2011.

Features

Save time carrying out entry-level research by identifying the size, growth, and leading players in the renewable energy market in China.

Use the Five Forces analysis to determine the competitive intensity and therefore attractiveness of the renewable energy market in China.

Leading company profiles reveal details of key renewable energy market players' global operations and financial performance.

Add weight to presentations and pitches by understanding the future growth prospects of the China renewable energy market with five year forecasts.

Macroeconomic indicators provide insight into general trends within the China economy.

For further details, click here!