Green Tech

Biodiesel manufacturer Imperium Renewables has withdrawn its plans to go public, citing "unfavorable market conditions."

The Seattle-based company filed the paperwork with the Securities and Exchange Commission on Thursday. It had filed to go public in May, and had plans to raise $345 million.

The news comes a few weeks after the company replaced its then-CEO, Martin Tobias, naming President John Plaza as interim CEO and investor Nancy Floyd as chairman.

Imperium Renewables said that Tobias' departure was part of a planned transition, but company watchers noted that his leaving was abrupt and not well publicized. (The company … Read more

The BigBelly solar-powered trash can has gotten a makeover.

The latest version of the BigBelly Solar garbage compactor will fit in better on city streets, all while flaunting its green credentials. Future versions will even have the ability to phone home.

The BigBelly uses a 30-watt solar panel on its top to charge a battery that powers a motor to crush garbage.

By compacting trash, city workers need to make fewer trips to empty bins, which reduces congestion and diesel exhaust, according to the company.

The company claims that compacting can eliminate four out of five trips. The savings from … Read more

A Dutch civil engineering company has designed a heat-absorbing road that bridges winter and summer.

The Road Energy System, from Ooms Avenhorn Holding, is essentially an asphalt road with tubes placed underneath. Water circulates to siphon off the heat from the road and it is stored underground for several months.

The heated road, sort of like radiant floor heating in a home, was originally conceived as a way to melt ice from roads without heavy salting.

Now, with growing interest in renewable forms of energy, the system can also be used to heat and cool homes while reducing greenhouse gas … Read more

Fashion faddies may take note of Pantone's color of the year, Blue Iris (No. 18-3943). I'll be using it in my new logo not because it's hip, but because I admire its qualities. Pantone's Leatrice Eiseman stated, "Blue Iris brings together the dependable aspects of blue, underscored by a strong, soul-searching purple cast. Emotionally, it is anchoring and meditative with a touch of magic." Blue Iris is "supposed to answer several needs, hopes, desires, that kind of thing."

Tongue out of cheek, I had a hope and desire that "green" … Read more

A newly created company called SolarReserve intends to commercialize a solar power plant capable of generating electricity and storing it in molten salt.

The venture was created by investment firm US Renewables Group, which has licensed technology from Hamilton Sundstrand, a subsidiary of United Technologies. A plant will be capable of generating 500 megawatts of peak power, the size of a typical power plant.

Solar thermal technology, which uses heat intensified by lenses and mirrors to create electricity, is being pursued by utilities because it is relatively cost-effective. It is also called concentrated solar power (CSP).

But because the sun'… Read more

IdaTech, a fuel-cell manufacturer in Oregon, announced a smallish new fuel-cell power supply today, the 250-watt iGen. The announcement caught my eye because I've written here a few times about fuel cells and other alternative energy sources (including the nuclear reactor piece last week), and this time I was able to figure out the device's approximate cost of operation, something that usually isn't disclosed for fuel cells.

The iGen's 250-watt output rating doesn't sound like a lot, but it's over half an average person's home electricity consumption. A continuous supply of 250 watts … Read more

In order to get its electric sports car to owners sooner, Tesla Motors plans to deliver cars with a temporary transmission that falls short of its originally promised performance.

The news was distributed to the wide world on Thursday in a blog post from Ze'ev Drori, Tesla's new president and CEO.

The post is a reprint of a letter that was sent to Tesla purchasers on December 21, as a follow-up to a town hall meeting for Tesla owners that took place on December 12. About 100 people, including those who called in, participated in the meeting, according … Read more

Another day, another CEO ouster at a green tech start-up.

Martin Tobias is out as chairman and CEO of Imperium Renewables, the company has announced. John Plaza, who founded the company with Tobias, is interim CEO while Nancy Floyd has taken over as chairman.

Tobias has been the spokesman and public figure for Imperium since its founding. The company has raised more than $200 million dollars and earlier this year christened a 100-million gallon refinery in Washington state. It has plans to build similar sized facilities in Hawaii, Argentina and elsewhere.

The ouster of Tobias is something of a surprise. … Read more

The superheroes of venture capital haven't exactly had a completely smooth year in green tech.

Kleiner Perkins Caufield & Byers wasn't the first VC firm to get into green tech. Nth Power, NGEN Partners, Draper Fisher Jurvetson and Mohr Davidow Ventures got there first, but Kleiner brought a lot of attention and prestige into the field, and helped push green tech toward the top of the VC agenda in the second half of 2004.

The firm also began to put money into a lot of companies with a pretty good amount of fanfare. John Doerr even cried in public at the TED conference … Read more