(wow) Words Of Wonders Level 1285 Answers – Burn slower: At a Louisiana coal depot, electrician Randall Brown had a brilliant idea: compact fluorescent lights (CFLs). Most of the world’s electricity is generated by coal-fired generators that spew carbon dioxide, mercury and sulfur into the atmosphere. Compared to conventional light bulbs, CFLs last longer and use less energy, reducing energy costs, reducing greenhouse gas emissions and saving about a quarter of a ton of coal over their lifetime.
Free! I’m standing in a cluttered room surrounded by residual current: stripped wires, copper strips, yellow connectors, insulating pliers. For me, it’s a tool of freedom. I’ve installed a dozen solar panels on my roof and they work. The meter shows 1,285 watts of power flowing directly from the sun into my system, charging my battery, cooling my fridge, humming through my computer, and setting my life free.
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The thrill of energy freedom is addictive. Don’t get me wrong; I love fossil fuels. I live on an island with no utilities, but my wife and I live a normal American life. We don’t need propane refrigerators, kerosene lamps, or composting toilets. We need a lot of power plugs and cappuccino machines. But when I opened the panel, wow!
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Maybe that’s why for me, like most Americans, one energy crisis or another looms over the past three decades. From the OPEC crisis of the 1970s to today’s skyrocketing oil and gasoline prices, the world’s focus on energy has plagued presidential speeches, congressional campaigns, disaster books, and my own sense of well-being with as much anxiety as the Cold War.
As National Geographic reported in June 2004, oil is no longer cheap and will soon plummet. Instability to find more oil from the Persian Gulf to Nigeria to Venezuela has weakened that lifeline. Natural gas can be difficult to transport and prone to shortages. We’re not going to run out of coal anytime soon, nor are we going to use up most of the untapped tar sands and oil shale reserves. But the magazine reported last September that carbon dioxide emissions from coal and other fossil fuels are warming the planet.
It feels so good to be free of that worry. With my new panels, nothing can stand in the way of me and unlimited energy – no foreign countries, no electric companies, no carbon crimes. I am free!
Shadows pass over my face and my heart. The meter shows only 120 watts. I need to start the generator and burn more gas. It’s not easy anyway.
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The downside of energy independence is addiction; when you get so little, you want so much. Under the microscope, I am like people in government, business and private life all over the world who have experienced this exhilarating and exhilarating freedom and are determined to seek more.
Some experts believe this pursuit is even more important than the War on Terror. “Terrorism does not threaten our high-tech existence,” said Martin Hoffert, a professor of physics at New York University. “But strength is what it is.”
Saving energy may prevent the day of reckoning, but in the end you can’t save what you don’t have. So Hoffert and others have no doubts: It’s time to step up and search for the next great fuel-satisfying machine that feeds human hunger.
Is there such a fuel? The shortest answer is no. Experts say it’s like a mantra: “There is no magic bullet.” While some true believers claim that only a grand conspiracy or lack of funding can stop us from the empty space or endless energy at the Earth’s core, the truth is that new fuel isn’t waiting at the heart of the equation. at the end of the drill.
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Enthusiasm for hydrogen-fueled vehicles can be misleading. Hydrogen is not an energy source. It’s found in oxygenated plain old water, but don’t eat it. The hydrogen has to be released before it can do its job, and it uses more energy than the hydrogen can recover. Today, this energy comes mainly from fossil fuels. There is no silver bullet.
However, the long answer about our next fuel is not so bleak. In fact, there are already many contenders for the energy crown held by fossil fuels: wind, solar, nuclear, and more. But the successor must be Congress, not the king. Almost every power master I’ve ever seen does something unexpected: They not only improve their own skills, they improve the skills of other people as well.
“We need everything we can get from biomass, everything we can get from the sun, everything we can get from the wind,” said Dr. National Bioenergy Center Director Michael Pacheco said Colorado… “But the question is, can we get enough?”
The biggest problem is the quantity. The world uses approximately 320 billion kilowatt-hours of energy every day. That equates to about 22 light bulbs burning continuously for every person on Earth. No wonder lightning can be seen from outer space. Hoft’s team estimates that humans could use three times that amount in the next century. For millions of years, fossil fuels have met increasing demand by converting solar energy into a solid form, but we won’t see anything like it again.
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Driven by my desire for energy independence, I search for technologies that can surpass these numbers. “If you have a big question, you have to give a big answer,” said Hermann Scheer, a friendly energy guru and member of the German parliament. “Otherwise people wouldn’t believe it.”
The answer is there. But for all the people who have gathered around fossil fuel fires, we humans need something else: We need to take a giant leap into a different world.
On an overcast day near the former East German city of Leipzig, I walk through fresh pastures and past ponds where wild geese feed. The fields are sprinkled with 33,500 photovoltaic panels, planted in rows like silver flowers, all pointing towards the sun and wafting gently along the contours of the earth. It is one of the largest solar arrays. When the sun is shining, the magnetic field generates 5 megawatts of electricity, enough to power an average of 1,800 homes.
Nearby is a large pit where coal has been mined for generations to fuel power plants and factories. The sky was brown with smoke, brown with sulfur. Today, mines are turned into lakes, generating coal power in furnaces 93 million miles (150 million kilometers) away.
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Solar power systems get energy directly from the sun – no fire, no emissions. Several labs and companies are experimenting with adult versions of baby magnifiers: giant reflective bowls or tanks that focus sunlight and generate heat to drive electric generators. But for now, solar refers to solar cells.
The idea is simple: Sunlight falling on the semiconductor layer destroys the electrons, creating an electric current. But the cost of batteries was once astronomical and remains high. My simple system cost $15,000 (US) with a capacity of about $10 per watt including a battery to store power when the sun isn’t shining.
Like most electronics, solar power is getting cheaper and cheaper. “Thirty years ago, for satellites, it was cost-effective,” said Daniel Sugar, president of Powerlight Corp., a fast-growing California company that has built solar installations for customers including Toyota and Target. “Today, it is cost-effective to power homes and businesses,” at least when electricity is expensive or unavailable. Tomorrow, almost everyone will understand that, he said.
Martin Rochesen, chief executive of a company called NanoSolar, sees the future in an array of red-topped vials filled with tiny semiconductor particles. “I put it on my fingers and it just disappeared into my skin,” she says. He wouldn’t say what the particles were, but the “nano” in the company’s name was a clue: They were smaller than a hundred nanometers — the size of a virus — and small enough to penetrate skin. .
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Rosheisen believes these particles hold promise as a low-cost way to make solar cells. Instead of making batteries out of silicon plates, his company coats the particles on a foil-like material, where they self-assemble to form a semiconducting surface. The result: flexible solar cell material 50 times thinner than current solar panels. Rosheisen hopes to sell it in sheet form for 50 cents per watt.
“Fifty cents per watt is the holy grail,” said David Pierce, president and CEO of Miasole, another company working on “thin-film” solar cells. At this price, solar can compete with utilities and take off. If prices keep falling, solar cells could replace the whole energy idea by reducing it
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