Passive Energy Design Attracts Interest

At the very top of the popularity list of e-mailed articles at the New York Times three days afters its initial posting, No Furnaces but Heat Aplenty in 'Passive Houses' is an instructive lesson in solving energy problems in a non-traditional way. Journalist Elisabeth Rosenthal describes an innovative approach to building design, focusing on the "passive house" of a German family that maintains comfortable temperatures throughout the winter even though it has no furnace. The trick? Ultrathick insulation, a unique ventilation system, and similar design advances that essentially recycle heating.

It's a technique that has been tried, but was marked by failure in the past.

Decades ago, attempts at creating sealed solar-heated homes failed, because of stagnant air and mold. But new passive houses use an ingenious central ventilation system. The warm air going out passes side by side with clean, cold air coming in, exchanging heat with 90 percent efficiency.

“The myth before was that to be warm you had to have heating. Our goal is to create a warm house without energy demand,” said Wolfgang Hasper, an engineer at the Passivhaus Institut in Darmstadt. “This is not about wearing thick pullovers, turning the thermostat down and putting up with drafts. It’s about being comfortable with less energy input, and we do this by recycling heating.”

There are now an estimated 15,000 passive houses around the world, the vast majority built in the past few years in German-speaking countries or Scandinavia.

This isn't an approach that I hear discussed often in the U.S., which is perhaps why there was such a tremendous amount of interest in the article at the New York Times. Unlike other forms of alternative energy at the residential level, which can cost tens of thousands of dollars to deploy, passive houses in Germany cost approximately 5 to 7 percent more to build than a conventional home. This technique definitely bears more investigation. Sometimes the solutions to the most vexing energy problems are right before us, but overlooked in the rush toward flashier, higher technology solutions.

Consuming Less as a Way of Life

Energy use and prodigious consumption go together, as anyone living in America--in the most consumer-focused society in the history of the planet--is keenly aware (but often oblivous to the consequences). Jim Merkel, an engineer living in a small town in Vermont made the transition from (as he describes it) a jet-set military salesman who voted for Reagan to a bleeding-heart pacifist, eco-veggie-head-hooligan. Along the way, he dramatically simplified his life, shedding many of his "toys", and figured out how to live comfortably on 5,000 USD a year.

The story of Merkel's amazing transformation, which recently appeared in the Times Argus, is especially timely as many of us are trying to figure out how to cope with the current economic downturn.

Times Argus staff writer, Kevin O'Conner, effectively paints a picture of Merkel's evolution from consumer to conserver, with many examples of the motivations behind adopting a simpler lifestyle, gleaned from a number of different cultures, including the Navajos. Ultimately, the lesson is pretty simple.

So what’s Merkel’s solution?

“The easiest is simply to take less.”

He also suggests “sharing” housing and transportation (“Share with another person and halve your impact; with four people, quarter the impact”) and “caring” for what you have, be it properly maintaining household items or supporting communities by producing and purchasing goods locally.

Farm stands and mom-and-pop stores are close, but aren’t supermarket prices cheaper?

“What you don’t pay over the counter you pay in taxes, dirty air, dead animals, polluted water, clear-cut forests, sweatshops and strip-mined lands,” Merkel writes in his book. “Small-scale bioregional producers, although their products might use less energy and materials and create less waste, don’t get big tax breaks and bailouts or discounted access to resources because they wield less political influence.”

More on Merkel's vision and the details of his simplified life on his Web site: The Global Living Project.

Turbine Recycling

A Boston Globe article, Where turbines wind up to get their second wind, tells the story of a new twist on recycling. A company in Plymouth, Massachusetts, reburbishes aging wind turbines, repairing and replacing bearing, gear boxes, and generators, as required, to meet the growing need for wind power.

Brian D. Kuhn, the cofounder of Aeronautica, aims for the mid-level market, a niche that has significant potential for growth.

"The nice thing about this midscale market that we are concentrating on is these are not huge machines," said Kuhn, who hopes his company will be able to supply turbines to power schools, homes, or even supermarkets. Already, he says, several people with local projects in the works have called seeking equipment.

With backlogs on new wind turbines hindering deployments, Kuhn has built a business around the increasing popularity of wind as an energy source.