CleanTechnica

To wrap up my ode to John Henry (and a more sustainable lifestyle) I am going to cover a few more everyday household plug-ins by giving the current ON the grid offering, it’s OFF the grid alternative, and weigh in on whether a switch is warranted.

ON
The Fridge: We all know what it does and why we use it–so what are the OFF the grid alternatives?

OFF
The Fridge: William “The Refrigerator” Perry, former defensive lineman for my beloved 1985 Super Bowl Champion Chicago Bears. You could try contacting him to see if he’ll deliver fresh food to your door on a daily basis. I understand he’s not very busy these days.

OFF
Jarring and canning fruits and vegetables to preserve for the winter months may save some space in the fridge, but cannot replace the fridge altogether.

SWITCH?
Realistically, it’s not likely. However, the size of refrigerators in this country is insane. My parents have an enormous fridge and regularly come across 3 year old cheeses and meats that get lost under piles of their newer/fresher replacements. In lieu of a switch to William Perry (we can’t all use him–it’s simply unrealistic) we can buy a smaller, energy efficient fridge, fill it with less food (eat fresher food), and keep the door open for very short intervals (know what you’re getting before you open it). A few generations back, families typically had more members yet much smaller fridges, so it can be done–and you’ll benefit from fresher fare.
Read the rest of this entry »

There is some excitement in the nuclear focused blog world about “The World’s First Commercial High Temperature Nuclear Reactor” based partly on a recent article in Power Engineering by Jana Miller titled “Powering Up A Growing Nation”. This project in Shandong Province will be a unique plant whose reactor heat source is two containers full of spherical fuel elements, each one of which is about the size of a billiard ball.

I am a bit reluctant to call this plant a “first”, but I can get just as excited about the third, 10th or 100th plant in a progressive series of improved plants that should number 1000 reactors or more.

The plant, designated as HTR-PM, will be a 200 MWe pebble bed reactor heated steam plant with two reactors, each with a single steam generator (boiler) feeding a single turbine. The plant will be built in Rongchen City on a site large enough to host series of perhaps 10-12 similar plants. In that area of China, there are hundreds of older coal fired power plants generating 50-300 MWe each.

Read the rest of this entry »

It started with a long discussion betweeen my wife and me. We each thought it’d be fun to get a scooter, but worried that, for us–a 1 car, 2 bike family–we would actually be doing more environmental damage by getting a scooter. Meaning, unlike many who get a scooter to use instead of their car (wise choice), we’d end up using our scooter instead of our bikes (un-wise choice). Being our primary mode of transport, the bikes would likely fall victim to the newer, sexier, faster scooter.

This got me on the thought process that I wished more people would first give a bike a try for their short trips, instead of viewing the scooter as their only alternative to combat gas prices. Of course it’s more work–but more work can be more rewarding. Which got me to thinking that there are plenty of tools that have traded elbow grease for electricity–yet we have benefitted little. Which turned me on to this mini-series…

Just as John Henry fought the steam hammer to show that human power cannot be undone by the industrial revolution. I am hoping to open a few eyes to the alternatives that are possible when we replace one of our everyday machines with the same machine sans motor/electricity/etc.
In the interest of full disclosure John Henry did beat the steam hammer but he also dropped dead in the process.
That said, I will be realistic with my comparisons–I don’t want anybody to drop dead of exhaustion. I’m sure I’ll find, in some cases, the modern invention to be more beneficial to the manual powered version it replaced.
Read the rest of this entry »

Not exactly washing without water, but with less than 2% of a normal washing machine. That’s only 1 cup of water for those sweaty gym clothes, grubby kid-wear, and foul socks.

Washing with soap and water has been THE WAY to clean most clothes for so long, it’s hard to imagine reducing H2O by 98%. What this technology lacks in sexy bells and whistles, it gains in implications. Billions of gallons of clean water could be conserved every year simply by adopting this dry cleaning technology. Less water also means less drying, which can add energy savings to those with energy-hungry clothes dryers. Read the rest of this entry »

Picture a kelp bed on the ocean floor swaying in the current.
Done?
Now picture an underwater field of bioWave turbines (pictured to your left) doing the same. But, unlike the kelp, supplying one half megawatt of electricity. (In kelp’s defense, it does provide oxygen, food, and a place for the elusive leafy sea dragon to hide.) Using habitat inspired and environmentally friendly design (biomimicry) the team at BioPower Systems have designed, and are now testing, the bioWAVE and bioSTREAM devices. Devices that sway in tune with the oceans currents while producing clean, renewable energy. The Australian company has also focused in minimizing the environmental impact of each device as not to upset the ocean’s many delicate ecosystems. Or, as their website puts it:

These systems will reside beneath the ocean surface, out of view, and in harmony with the living creatures that inspired their design.

Read the rest of this entry »

I ran across this article at The Oil Drum and thought it was too tasty to pass up. It describes a new design to help concentrated solar power (CSP) increase efficiency and reduce cost.

Here’s the problem: solar thermal collectors focus the sun’s heat onto a clear tube of fluid (see: Intro to Solar Thermal). The collectors generate the most energy when the sun’s rays are parallel with the tube of fluid.  Since the sun moves across the sky throughout the days and seasons, it only reaches this “sweet spot” certain hours each day. But, if the solar collectors could move to track the sun, their power output could increase dramatically. Keep in mind that CSP is one of the most efficient forms of solar power. Read the rest of this entry »

I cover a lot of upcoming or future technology, but it’s time to step into the present and aim for the past. Today we’re going to look at a technology available right now that can make some wanton energy waste history. It’s a surge protector that stakes the hearts of vampire electronics without hassling you, the sleeping victim.

Vampire appliances are pretty much anything you can plug in that still sucks energy when it’s supposedly turned off. Some are pretty obvious - the clocks on your microwave or VCR/DVD player burn all day, everyday. We know they’re not “off” because we cans see their LEDs glow. But other electronics, from your television to your cell phone charger also draw power when they’re plugged in but not in use. Check out a handy graph from Good Magazine. Some gadgets are notorious, like your plasma TV. Estimates claim that 5% or more of U.S. energy usage is insidiously wasted by “stand-by mode” or certain misleading “off” buttons. A whopping 5% may not sound like much, but it adds up to about $1 Billion dollars per year - and energy prices will probably continue to rise.

Be honest - how many times would you go around the house unplugging everything before it got old? Smart greenies have been switching off their surge protectors, but it’s easy to forget while watching your favorite late-night TV show or blogging at 4am. So what can we do about these metal-toothed Nosferatu in our midst? How about a surge protector that turns off all your appliances for you? Read the rest of this entry »

The internet is saving 10 times the energy required to run an internet-linked computer.

Remember when renting a movie required a trip to the video store or checking a bank balance required a visit to the bank? Now, anything from used books to driving maps are just a click away. Telecommuting is common and taxes can be submitted electronically to the IRS. The internet is shaping our lifestyles, allowing us to save energy.

A recent study by the American Council for an Energy Efficient Economy (ACEEE) discovered that every kilowatt-hour of electricity used to power communications and information technologies is resulting in a 10 fold increase in energy savings.

“Acceleration of information and computer technology across the US landscape post 1995 is driving much of the nation’s energy-productivity gain,” says John Laitner of the ACEEE and coauthor of the study. “Had we continued at the historic rate of prior years, we would today be using the energy equivalent of 1 billion barrels of oil more [per year] than we were” in the early 1990s.

Read the rest of this entry »

Problems with silicon-based solar electricity (PV)

In the world of solar electricity generation, the price and shortage of silicon have been barriers to wider adaptation of solar photovoltaic (PV), especially as demand continues to rise. Solar PV’s efficiency in converting sunlight to electricity has also been criticized. That’s why non-silicon-based alternatives are especially attractive. I spoke with Gregg Clevenger, CFO of Infinia Corporation, on Monday (February 11) to find out what his company is up to and why renewable energy advocates are all atwitter about it.

According to Gregg, “We set out to address climate change and went back to ground zero with our Stirling engine product, to develop it into a design that is simple enough to be mass-produced widely and to generate solar electricity at 20-30% of the cost of solar PV.”

Read the rest of this entry »

When we think about “clean” energy, we envision big, dark solar panels out in a field or on a roof. Or maybe wind turbines with those big whooshing propellers. What we don’t often think about are the other components that make solar panels and other technologies possible and practical for everyday use.

One very important component of these systems is the inverter. Inverters make it possible to hook your solar panels (or other energy dynamo) into batteries, your electrical system, and/or feed electricity back into the grid. An inverter’s most important task is to convert D.C. (direct current) electricity into A.C. (alternating current). In case you’ve forgotten your high school chemistry, A.C. is all the rage with the power company. Depending on the type of inverter you buy, they can pump all the excess electricity you produce into batteries or back into the power grid. And yes, the power company will pay you for the energy you send them. Read the rest of this entry »