Wednesday, May 23, 2012

Automation and Lighting Control


Schneider Electric and Tridonic Announce Strategic Partnership

Schneider Electric and Tridonic recently announced a strategic partnership. The corporate partnership represents collaboration around projects business, and will see the companies work together to promote energy efficient lighting control solutions to customers.
Schneider Electric operates in more than 100 countries and, through its diverse product and business portfolio, specialises in the design and implementation of lighting control systems. Tridonic, headquartered in Austria and part of the Zumtobel Group, enables customers around the world to develop innovative applications and solutions, through lighting components, lighting management systems, connection technology and LED solutions. Within the partnership there is a project with LEDON, a sister company of Tridonic, which develops and markets hi-tech LED retrofit lamps for private consumers.
The strategic partnership between the businesses will combine the product innovation and market pedigree from the companies to develop cutting-edge, energy efficient lighting control solutions for customers globally. The solutions will meet the needs of diverse market sectors, including airports, hospitals, infrastructure and high performance green buildings. Schneider Electric benefits from Tridonic’s deep know-how in electronic control gears as well as from the innovative Tridonic products. Tridonic benefits from Schneider Electric’s excellent customer relations in the project business where Tridonic takes the role as first choice partner for lighting management. In all cases customers will stand to benefit by receiving lighting systems with synchronised components from one hand and enjoying service and safe systems.

Tuesday, March 20, 2012

Home automation and Lighting Control

BY LIGHTING CONTROLS ASSOCIATION, ON JANUARY 4, 2012
by Jim Brodrick, Department of Energy

As more and more LED lighting products have come onto the market, one issue that has generated considerable confusion is dimmability. As discrete devices, LEDs are fully dimmable, and as a result the technology has long been touted as being more suitable for dimming than other lighting technologies. Many SSL products come with claims of dimmability, but in practice, many users have encountered problems when trying to dim them, resulting in no small degree of frustration. What’s more, LED sources exhibit other unfamiliar dimming behavior, as they typically do not lose efficacy or shift in color as much as incandescent sources do when they dim.

Why have there been dimming problems with LED lighting products? A big reason is that nearly the entire existing stock of dimmer controls – those already installed in residential, office, and commercial settings – was designed for incandescent lamps, and not for LEDs. That’s important, because the two technologies, in addition to being based on totally different principles, also interact with this installed base of controls quite differently. Electrically, an incandescent lamp is a simple resistor, whose light output is determined by the effective average of the voltage that feeds it, and responds predictably and consistently to the various circuitries used in traditional dimming controls. An LED lamp, on the other hand, consists of not only the chips, but also typically a driver. Separately, and especially together, they comprise something considerably more complicated than a simple resistor – something that is very much affected by nuances in circuit design used in traditional line-voltage dimming controls.

Making LED lighting products dimmable is not an easy task, and is further complicated by a lack of standards. For example, there are no performance standards for making dimmability claims about a product, and thus the term “dimmable” remains vague and undefined. This wasn’t much of a problem with incandescent lamps, which all behave pretty much the same way with dimmers. The National Electrical Manufacturers Association has formed multiple committees focused on improving LED dimming experiences. To date, they have produced an educational white paper, as well as guidance aimed at helping LED product developers improve their dimming compatibility with the installed base of dimmer controls. Additional efforts are still needed to define standard dimming performance evaluation and dimming compatibility testing.

Such efforts are sure to reduce dimming issues, but they likely won’t eliminate them. The bottom line is that successfully dimming an LED lighting product with a familiar line-voltage dimmer control depends on the driver and its compatibility with the dimmer and, for low-voltage circuits, the transformer, too.

The best way to know how or if a product will dim is to test it out – and this means the entire circuit, not just one lamp with one dimmer. That’s because there are minimum and maximum numbers of lamps that will work with a given dimmer, and this varies by the lamp and dimmer (and, for low-voltage systems, the transformer) combinations. But such testing is not always practical. To make it easier on buyers and specifiers, a number of manufacturers have started providing this kind of information in dimming compatibility tables for their SSL products, and the Lighting Facts® database will be adding links to such tables at some point in the near future. It should be noted that system variations can lead to performance variations, however, so even though a circuit with a specific combination of lamps and dimmer works today, if a different lamp (either a different make/model, or even a revision to an installed make/model) is swapped in for an existing lamp, all bets may be off.

Although dimming problems persist, and many product dimming claims are still unreliable, the prospects for dimming LED lighting are much better today than they were even a year ago – and will continue to improve. Not only are dimmable LED sources available, but new dimmers are also hitting the market. The new approaches to dimming may eliminate many compatibility concerns entirely. But for now, at least, successful dimming depends on buyers and users being well-informed and exercising due diligence.

Friday, October 14, 2011

African Power Generation

Angola’s Kambambe hydroelectric dam to operate from October 2012


The Kambambe dam
Luanda, Angola --- ESI-AFRICA.COM --- 14 October 2011 - It’s been announced that the Kambambe hydroelectric dam, located in Kwanza Norte province of Angola, and with a total installed capacity of 180 megawatts (MW), will start its operation in full from October 2012.

This information has been released here by the administrator of production of the National Electricity Company, José Carlos Neves, during a morning programme on Radio Nacional de Angola (RNA).

The Kambambe Dam, according to Neves, is benefiting from rehabilitation and modernisation of two units, involving the replacement of major instruments of supervision and control of the venture, which had previously reduced its production by 50% of installed capacity.

He stressed that the project aims to ensure greater operational capability and availability of the project, and confirmed that completion was scheduled for October next year.

“With full operation of the hydroelectric dam the power supply to Luanda and other regions of the country will be improved,” he said.

Monday, July 18, 2011

Alternative energy

Green: Lighting the Hopes of the Grid-less
Jul 16, 2011 New York Times
Felicity Barringer

Green: Politics

From Lenin to Franklin Delano Roosevelt, 20th-century political leaders made the provision of universal electricity a centerpiece of their programs and oratory. “Communism is Soviet power plus the electrification of the whole country,” one slogan went. Or, in the case of F.D.R.’s Tennessee Valley Authority, “T.V.A.: Electricity For All.”

A rural family in southern India with a solar-powered light fixture.SelcoA rural family in southern India with a solar-powered light fixture.

In this century, the United Nations has updated the concept in addressing the problem that 1.4 billion people in the world are living without electricity. The new buzz phrase is “Sustainable Energy For All,” but the approach is very different, because in many cases these people cannot be connected to a grid. Given that the vast majority of the unconnected live near the equator, where the sun is at its zenith, the solutions being tried are almost all based on solar power.

One of the chief proselytizers is Richenda Van Leeuwen, who oversees the energy-access efforts of the United Nations Foundation, a philanthropic organization that works to support many of the United Nations’ humanitarian efforts. Like a Hollywood producer trying to bring together a script, a director, some actors and some financial angels, she spends her waking hours trying to assemble packages of financial resources, new technologies and new payment practices and to pinpoint willing recipients of the products.

“There are so many different targeted applications to help people solve problems on a daily basis,” she said in an interview — things like a solar-powered lantern that an Indian midwife can hang above the bed so that both of her hands are free, for example. Or the desk lamps made by the San Francisco-based company d.Light Design. Or solar-powered drip irrigation systems being used in Benin and India, or solar-powered lights for voting booths in the Democratic Republic of Congo.

Ms. Van Leeuwen’s goal is to provide emerging companies making these technologies with access to funds from socially conscious investors who are willing to tolerate higher risks and less financial reward. First she seeks to ensure that the price of the products is within the reach of the people who will be using them. Then there is a need for a supply chain that can distribute the devices, and a support system that ensures that there are spare parts and local people who can do repairs.

A lot of this would not have been as possible a decade or two ago, when solar power technologies were less robust and electrical lighting usually required energy-hungry incandescent bulbs. Now, Ms. Van Leeuwen said, advances in light-emitting diodes, which provide more light with less energy, and in small-scale solar power technology are spawning a new generation of devices for people who lack access to a grid.

The effort evokes the spread of cellular phones, swiftly adopted in places around the world that had no land lines. Ms. Van Leeuwen cited a recent prediction by the United Nations publication World Energy Outlook that said that if the goal of 100 percent access by 2030 is achieved, 70 percent of those with new access will get it either through a mini-grid or off-grid devices like those mentioned above.

If the prices of the new devices can be scaled to their means, these people will form a significant potential market. “If you can get a cellphone in the remotest village,” Ms. Van Leeuven said, “you can get a small-scale energy solution, too.” In 2010, she pointed out, more money was invested in renewable energy in the developing world (mostly China) than in the developed world

lighting control and energy management

Future for incandescent lightbulbs looking dim
Jul 18, 2011 Miami Herald
So, how many members of Congress does it take to screw up a light bulb?
It only sounds like a joke. The fate of the incandescent bulb, the oldest and most common of household electrical devices, has morphed into a political litmus test, one championed by conservative leaders from Rush Limbaugh to Republican presidential hopeful Michele Bachmann.

In a vote along party lines, the House last week blocked a GOP effort to repeal efficiency standards that will begin phasing out the worst watt-wasters next year. But backers like Florida Rep. Bill Posey who sees the notion of regulating bulbs as evidence of a “nanny state’’ run amok, haven’t abandoned the right to light fight.

“This is a sore spot with people,’’ said the Rockledge Republican. “My constituents overwhelmingly don’t want the government to decide what kind of light bulb they want.’’

Whichever way the Washington debate goes, the future is dimming for cheap, old-school filament bulbs, which haven’t changed much since Thomas Edison patented his design more than 130 years ago.

Along with now-common compact florescent bulbs, a new generation of light emitting diode (LED) bulbs claiming up to 23 years of life has begun showing up on store shelves and their eye-popping initial prices of $50-plus have started to drop. Both kinds last years longer and sip roughly a quarter of the juice of their predecessors.

David Schuellerman, a manager for General Electric Lighting, said demand for standard bulbs has dropped by half over the last five years, a trend he expects to continue as homeowners begin following the LED lead of business, which has already put the technology in everything from refrigerator cases to traffic signals.

Maintenance and energy saving easily justify higher initial costs, he said. “It’s compelling when you think that these large companies that have the capacity to crunch the numbers — Starbucks, Walmart, Target — like LED for their stores,’’

At Light Bulbs Unlimited in Fort Lauderdale, purchasing agent Marek Luce has seen increasing interest in LEDs, which are fully dimmable, burn much cooler and are so versatile they come in rope or tape strips now popular under kitchen cabinets. But he’s also noted some runs on incandescents by customers worried about “bulb ban” rumors.

“At times, if they need one, they’ll buy 10. It’s not like they’re buying 200 or 300,’’ said Luce, who believes consumer education will ease concerns. “Nobody feels like anybody’s opinion was asked. A lot of people are afraid of not being left with a choice.’’

The backlash has flummoxed environmentalists and energy efficiency advocates.

“Because the light bulb is so iconic, it’s being used a poster child for a political debate about how much government should regulate,’’ said Kateri Callahan, president of the Alliance to Save Energy, a Washington, D.C.-based nonprofit whose members include 150 major corporations and organizations. “To me, it’s mind-boggling that we would try to take a step backwards from what we’ve been doing on a regular basis.’’

The standards — produced with bipartisan congressional support and signed by President George W. Bush in 2007 — were drawn up with the goal of reducing national energy demands and pollution. They mirror regulations that have been applied to appliances from refrigerators to water heaters since the 1970s.

Supporters insist the standards will save consumers billions of dollars over the long haul.

By 2020, when all bulbs will have to be about 28 percent more efficient than current standard bulbs, the average household bill is expected to drop by 7 percent, or $85 a year, according to an analysis by the National Resources Defense Council. Another study by the American Council for an Energy Efficient Economy put overall savings for Americans at $12.5 billion a year, over $900 million in Florida alone. The study also claims the new standards would eliminate the need for 33 power plants nationwide.

The rules, which match standards already in place in Europe, have support from lighting manufacturers, trade associations and the Obama administration.

Last week, U.S. Energy Secretary Steven Chu dismissed claims by critics that the standards amounted to a de facto ban of incandescents.

They do effectively phase out the cheapest standard bulbs by 2014, starting with 100 watt ones that are supposed to be off store shelves by January. But manufacturers say they already have halogen-based incandescents available that offer similar quality light and dimming options but will cost a bit more.

“The only difference is they help American consumers save more money,’’ Chu said.

But to some conservatives, the bulb regs have become a lightning rod.

Limbaugh, on his radio show, called them an assault on personal choice, proclaiming, “Let there be incandescent light and freedom.’’ Bachmann, the Minnesota representative and Tea Party favorite considered an early GOP presidential front-runner, proposed one bill to repeal the standard.

The House voted on a second similar one from Rep. Joe Barton, R-Texas. It won a majority, 233 to 193, but failed because it was introduced under a rule requiring two-thirds approval.,

The debate extends beyond Washington. Last month, the Texas Legislature passed a bill allowing use of incandescents — but only if they’re made in the state. South Carolina and Pennsylvania are considering similar measures

Critics point to the high cost of alternatives and pollution concerns from mercury used in compact florescent bulbs, which are supposed to be recycled and require careful cleanup if they’re broken — both concerns supporters contend have been exaggerated,

Maureen Martin, senior fellow for legal affairs at The Heartland Institute, a free-market think tank based in Chicago, believes congress has long overstepped its authority with efficiency standards.

“Just because we have always done something in the past doesn’t make it right,’’ she said. But she also acknowledged that the debate was bigger than the bulb.

“It has become a symbol for low-flow toilets and all the other restrictions that have been imposed on everyday things,’’ she said. “People are so fed up at the grass roots level.’’

Florida Rep. Posey supported the repeal, even though it was opposed by an LED manufacturer in his district, Satellite Beach-based Lighting Science Group.

The company’s chief executive, Jim Haworth, issued a statement crediting the tougher standards with sparking industry innovation, helping his company grow from 100 to 350 employees in the last year and reducing energy use and pollution. Haworth called lighting, which consumes 19 percent of global electrical output, the “low hanging fruit’’ in energy conservation.

Posey, who said he used both traditional and florescent bulbs in his home and offices, stressed the repeal wasn’t intended to promote aging light bulb technology but aimed at preserving consumer choice and cutting through the regulatory red tape.

“To have 40 pages of federal code over what kind of light bulb you can have is ridiculous,’’ he said.

Though the repeal failed, foes have already launched a back-door attack with an amendment that would strip the efficiency program of funding, but with the Senate controlled by Democrats, their hopes appear to be flickering.

Bob Keefe, a spokesman for the environmental group NRDC, said GOP ideologues had hijacked a common sense measure that had already made many appliances more efficient.

“I don’t think anybody really wants to go back to ice boxes or 1960s refrigerators, do they?’’

Wednesday, June 8, 2011

Electricity no longer a cheap commodity

Eskom may lose management of national electricity grid


Cape Town, South Africa --- ESI-AFRICA.COM --- 08 June 2011 - The Cape Chamber of Commerce has welcomed plans to take away the management of the national electricity grid from Eskom, and to allocate it to a new and independent operator.

Business Live reports that the changes were outlined in the Independent System and Market Operator Establishment Bill that is to go before Parliament shortly. The Bill was published on 13 May and the public have until 13 June to comment on it.

“This is a long overdue development and we hope it will create a level playing field for independent power producers (IPPs) to contribute to solving the country's energy crisis,” said, Chamber president Michael Bagraim.

Eskom's failure to conclude purchase agreements with IPP’s has been heavily criticised, as have the long delays in making use of co-generation projects.

“The problem is that when Eskom is given the job of buying in power it will naturally favour its own power stations, and the IPPs will just not feature until we have another emergency on our hands,” said Chamber energy portfolio committee chairman Peter Haylett.

He explained that the Bill provided for the new company which, like Eskom, would be owned wholly by the state, and would take over the distribution network and control the purchase and sale of electricity. This model had been successful in other countries and it should also work in South Africa.

Haylett said that the new company would inevitably employ former Eskom distribution staff, but he hoped there would be some new blood at the top in order to develop a culture of independence and win the confidence of IPP’s.

“I think the government has realised that it needs help in financing new power stations and the best way to do this is to bring in the private sector,” he suggested. The big bonus is that this will open up opportunities to use new methods of generating electricity, such as combined-cycle gas power stations and more wind power, which complement each other perfectly. Both gas and wind power projects can be constructed in under three years, while coal and nuclear plants take eight to 10 years to build. This will speed up the supply of new capacity,” he pointed out.

Haylett said breaking Eskom into two independent companies should make it easier to manage the electricity industry as each company would be able to focus on its specific task. It would also introduce competition with IPP’s and this should improve efficiency and keep costs in check.

“We are sure the frustrated IPP’s which have been watching from the sidelines will welcome this Bill. The challenge now will be to make it all happen as quickly as possible,” Haylett concluded.

Thursday, May 26, 2011

electricity crisis

return to the top
3. Google And Citibank Each Throw $55m To The Wind
May 25, 2011 Associated Press
MOUNTAIN VIEW, Calif. (AP) -- Google Inc. is throwing $55 million to the wind in California.
The Mountain-View-based Internet search giant says it's partnering with Citibank to help finance the Alta Wind Energy Center wind farm in the Tehachapi Mountains.

The Los Angeles Times reports Google and Citibank are each plunking down $55 million.

The Kern County wind farm will generate 1.5 gigawatts of electricity, enough to power 450,000 homes through Southern California Edison.

The Alta Wind project is being built in phases. Segments are already generating 720 megawatts of energy and another 300 megawatts goes online by the end of the year.

Google and Citibank are buying the fourth phase of the project, known as Alta IV, and will lease it back to developer Terra-Gen to operate over a long-term contract.

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Information from: Los Angeles Times, http://www.latimes.com