Category Archives: Energy

Data Center Energy Needs

The tech industry is facing an energy crisis. The cost of power consumption by data centers doubled between 2000 and 2006, to $4.5 billion, and could double again by 2011, according to the U.S. government. With energy prices spiking, the challenge of powering and cooling these SUVs of the tech world has become a major issue for corporations and utilities.
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The modern data center is like a vast refrigerator with hundreds or thousands of ovens blazing away inside. Six-foot-tall metal racks stacked with pizza box-size computers, storage devices, and network-routing machines are lined up in rows. Chilled air blows through the equipment from vents in the floors of “cold aisles.” Hot air blows out of the back ends into “hot aisles” and is drawn off and vented out of the building. Inside the centers, there’s a dull roar as large quantities of air shoot through ducts, vents, and computers.

So intense is the competition among tech companies to lower their costs of processing data that some treat information about their energy use like state secrets.
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The $4.5 billion spent in the U.S. in 2006 is the equivalent of the electric bills for 5.8 million U.S. households.

When you realize the huge cooling needs (in addition to the need for electricity to run the computers) you can see the huge advantage of a cold climate where you can take advantage of cool air for cooling.

Solar Thermal in Desert, to Beat Coal by 2020

Google, Chevron Build Mirrors in Desert to Beat Coal With Solar

Along a dusty two-lane highway in California’s Mojave Desert, 550,000 mirrors point skyward to make steam for electricity. Google Inc., Chevron Corp. and Goldman Sachs Group Inc. are betting this energy will become cheaper than coal.

The 1,000-acre plant uses concentrated sunlight to generate power for as many as 112,500 homes in Southern California. Rising natural gas prices and emissions limits may make solar thermal the fastest-growing energy source in the next decade, say backers including Vinod Khosla, the founder of computer maker Sun Microsystems Inc. Costs for the technology will fall below coal as soon as 2020, the U.S. government estimates.
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“Solar thermal can provide a substantial amount of our power, more than 50 percent,” says Khosla
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Nine solar thermal plants built in the California desert from 1985 to 1991 still operate, with Juno Beach, Florida-based FPL Group Inc. running seven. They have combined capacity of 354 megawatts, enough to power 230,000 Southern California homes. Development slowed when Congress eliminated tax credits for alternative energy in the early 1990s. Laws put in place in 2005 give solar investors a 30 percent tax credit.

Great progress is being made adding wind and solar capacity. And the increasing oil prices are encouraging much faster adoption of these technologies. The promise of widespread adoption is rapidly becoming a reality.

Wind Power Potential to Produce 20% of Electricity Supply by 2030

Wind energy has been growing tremendously. In 2000 there were 2,500 megawatts (MW) of installed wind capacity in the United States. By the end of 2007, the U.S. installed capacity exceeded 16,000. A recent Department of Energy report sees the potential to provide up to 20% of our nation’s electrical supply via wind power by 2030.

Inspirational Engineer

One of the topics I care about is engineers making a real difference in the world. I lived in Singapore and Nigeria while I was growing up and traveled widely. My father was a professor of engineering (chemical, industrial), statistics and business. He was very interested in applying technology and human knowledge to help people have better lives, and I share that interest.

People like William Kamkwamba are the people that are worthy of respect. I wish the USA was more focused on people that are worthy of attention, instead of who the news media choose to show and people choose to read about. At least a few of you seem to like reading about those I do, based on the traffic this blog receives (well actually that would be a pretty poor metric, let say the attention popular science sites, magazines, podcasts, TV shows… receive).

Another video with William at TED. I posted about William previously: Make the World Better and Home Engineering: Windmill for Electricity.

More Efficient Water Heaters

GE’s New Water Heater Could Kill 30 Coal Plants

until today, Energy Star didn’t regulate water heaters at all. They’re the most energy-hungry single appliance in the home, and are responsible for about 17% of residential energy use. But because of a lack of consensus on how they should be regulated, and resistance from industry, their efficiency went completely unregulated. Well, that all changed today.
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The water heater first uses a heat pump to bring the water up to the temperature of the ambient air. Then the electric water heater takes over, bringing the water up to 140 degrees F.

This new design is more than 50% more efficient than previous water heaters. If every home in America had one right now, we would need 30 fewer coal-fired power plants! Every home that installs one will see their yearly power bills drop up to $250. Because the new device uses a heat exchanger, it will actually make your furnace work harder during the winter. But in the summer, and in warm climates, it will actually help cool your house!

The new water heater will be available in 2009. A great deal of savings are available from simple actions like using compact fluorescent light bulbs, better insulation and when buying new appliances buying energy efficient appliances. Tankless water heaters, for example, are available now: Bosch AquaStar Natural Gas Tankless Water Heater.

Ethanol Scam

The Clean Energy Scam

The Amazon was the chic eco-cause of the 1990s, revered as an incomparable storehouse of biodiversity. It’s been overshadowed lately by global warming, but the Amazon rain forest happens also to be an incomparable storehouse of carbon, the very carbon that heats up the planet when it’s released into the atmosphere. Brazil now ranks fourth in the world in carbon emissions, and most of its emissions come from deforestation.
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Meanwhile, by diverting grain and oilseed crops from dinner plates to fuel tanks, biofuels are jacking up world food prices and endangering the hungry. The grain it takes to fill an SUV tank with ethanol could feed a person for a year. Harvests are being plucked to fuel our cars instead of ourselves. The U.N.’s World Food Program says it needs $500 million in additional funding and supplies, calling the rising costs for food nothing less than a global emergency. Soaring corn prices have sparked tortilla riots in Mexico City, and skyrocketing flour prices have destabilized Pakistan, which wasn’t exactly tranquil when flour was affordable.
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One groundbreaking new study in Science concluded that when this deforestation effect is taken into account, corn ethanol and soy biodiesel produce about twice the emissions of gasoline. Sugarcane ethanol is much cleaner, and biofuels created from waste products that don’t gobble up land have real potential, but even cellulosic ethanol increases overall emissions when its plant source is grown on good cropland. “People don’t want to believe renewable fuels could be bad,” says the lead author, Tim Searchinger, a Princeton scholar and former Environmental Defense attorney. “But when you realize we’re tearing down rain forests that store loads of carbon to grow crops that store much less carbon, it becomes obvious.”

Solar Energy: Economics, Government and Technology

An American Solar Opportunity Gets Shipped Abroad

The project will pour $1 billion into utility-scale photovoltaic solar farms that will directly feed power into a country’s electrical grid. The installations will range from fewer than 2 MW to up to 50 MW, while a single farm could cover hundreds and hundreds of acres.

They’ll be installed in Europe. In Asia. And maybe even in America too, one day. Why not now? Because AES wants to sow its solar seeds in only those countries that offer the most “attractive tariffs.” That eliminates the US from the list of potentials, immediately. And it gives countries like Germany, Spain, Italy and South Korea the clear advantage. They all have can’t-beat national incentives for solar developers.

It’s one of the sad facts of Washington’s incoherent clean energy policy these days. How can a country lure in clean energy projects when there are far more appealing offers elsewhere?

Government actions impact economic decisions. It will likely take more than 10 years to have good data on what government investments pay off in the energy sector. But I would say it is a pretty good bet to invest in technology such as: solar, geothermal, wind… Countries that create global centers of excellence in these areas are likely to benefit greatly. The only question I think is that many countries are smart enough to see the benefits and so likely many countries will try.

Any time many actors pursue the same economic strategy there is the risk that the payoff is diluted with so many others having done the same thing. Still the reason so many countries have adopted the strategy of developing centers of excellence in science, engineering and technology is that it is such a good idea. The USA has a problem in that we are spending more than we produce on luxuries today so there is much less available to invest compared to other countries (and compared to 40 years ago).

$10 Million X Prize for 100 MPG Car

Progressive Automotive X PRIZE

The window for applications will be open until mid 2008, when a thorough qualification process will assess safety, cost, features and business plans to ensure that only production-capable, consumer-friendly cars compete. Those that qualify will race their vehicles in rigorous cross-country stage races in 2009 and 2010 that combine speed, distance, urban driving and overall performance. The winners will be the vehicles that exceed 100 MPG, meet strict emissions standards and finish in the fastest time. Host cities involved in the competition route are to be announced shortly.

Seeking Solar Supremacy

The dance of the particles

Engineering professors Ray LaPierre, who is working with Cleanfield on solar cells made from a dense turf of nanowires, and Adrian Kitai, who co-founded Flexible Solar to make bendable solar panels that are less costly to manufacture, are showing how skills typically prized in the telecom sector can be repurposed to build better solar technologies.

Similar efforts are also being made at the University of Toronto’s Institute for Optical Sciences, where a new spin-off called The Solar Venture aims to improve the economics of solar. “Ontario was a global leader in telecom, but now that has slowed down,” says Rafael Kleiman, professor of engineering physics and director of McMaster’s Centre for Emerging Device Technologies. “All the people, all this research (in telecom), is finding a new home. I really believe Ontario can make itself a global hub in solar photovoltaic technologies.”
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A solar cell is just a big specialized chip, so everything we’ve learned about making chips applies,” Paul Saffo, an engineering professor at Stanford University, recently told the New York Times. There’s a reason why California’s Silicon Valley, the headquarters of data-networking king Cisco Systems and semiconductor goliath Intel, is positioning itself as Solar Valley.

All around the world people are aiming to create centers of excellence for solar power research and production.

Global Wind Power Installed Capacity

The top five countries in terms of installed capacity are:

Germany (22.3 GW – gigawatts)
USA (16.8 GW)
Spain (15.1 GW)
India (8 GW)
China (6.1 GW)

Global capacity was increase by 27% in 2007. Record installations in US, China and Spain:

Wind energy has a considerable impact on avoiding greenhouse gases and combating climate change. The global capacity of 94 GW of wind capacity will save about 122 million tons of CO2 every year, which is equivalent to around 20 large coal fired power stations.

“We’re on track to meeting our target of saving 1.5 billion tons of CO2 per year by 2020”, said Steve Sawyer, “but we need a strong, global signal from governments that they are serious about moving away from fossil fuels and protecting the climate.”

Meeting energy needs using wind power is growing very rapidly, which is a great thing. It is still a small contributor to our overall energy needs but every bit helps.