The designers of Seattle’s Bullitt Center have overachieved. The designers set out to demonstrate that a six-story office building could generate all of the energy it needs, but after one year of operation, it is sending a sizable energy surplus to the local power grid, according to data released by its developer, the Bullitt Foundation. Consumption is simply far lower than what its architects and engineers projected for the 52,000-square-foot building. Instead of using 16kBtu per square foot—half the energy-use intensity (EUI) of Seattle’s best-performing office building—consumption during its first year was just 10kBtu/sf …read on at Architectural Record
Community-gardening advocates have sold urban farming as a sustainable local alternative to industrial-scale farming and as an educational platform for healthier living. And municipalities are buying in, adopting urban ag to transform vacant lots into productive civic assets. In the last two or three years, however, entrepreneurial urban farmers have opened a new frontier with a different look and operating model than most community gardens. Their terrain is above the ground, not in it. Working with help from engineers, architects, and city halls, they have sown rooftops and the interiors of buildings worldwide. “There’s a lot of activity right now, and there is huge potential to do more of it,” says Gregory Kiss, principal at Brooklyn-based architecture firm Kiss + Cathcart. Continue reading “Vertical Farming Grows Up”
The stats on occupant comfort are disappointing, and green buildings are no exception. Consider, for example, heating and cooling performance. Thermal-comfort standard standards stipulate that such systems should satisfy at least four out of five occupants. “Very few buildings actually perform that well,” according to John Goins with the Center for the Built Environment (CBE) at UC Berkeley. Out of the 609 buildings in CBE’s database, only 13 percent meet ASHRAE’s performance threshold; among those that are LEED-certified, 20 percent make the grade. There is increasing recognition that all that discomfort may be translating into a lot of wasted energy. Goins estimates that the average office building wastes 4 percent of its energy just by cooling and heating more than occupants want. The indirect impact could be even bigger when one considers how disgruntled occupants—who in most buildings lack an effective channel for requesting change—fight back against the machine. They may block air vents or plug in space heaters to combat excessive air-conditioning…
Excerpted from the May/June edition of GreenSource Magazine. Read the story at GreenSource.
As design teams work toward harnessing air flows around buildings, they are producing some intriguing structures. But just how viable is wind power as a source of on-site renewable energy?
By Peter Fairley
Wind power is the fastest-growing source of megawatts thanks to the jumbo-jet-sized turbines sprouting en masse worldwide. But it also has a significant presence in the city, where gusts regularly send umbrellas to landfills. Rather than considering it a nuisance, architects increasingly view urban wind as a renewable resource for on-building power generation.
Building-integrated wind power (BIWP)—wind turbines mounted on or incorporated within an occupied structure—may lack wind farms’ economies of scale. But like the leading source of on-building renewables—photovoltaics (PVs)—wind turbines offer some advantages in architectural applications. No roads get cut through wilderness to erect towers, and they deliver electricity without power lines and transmission losses. Wind turbines are also attractive to designers and clients looking to express a commitment to sustainability.
Such benefits provide potential for dramatic growth, says mechanical engineer Roger Frechette, principal in the Washington, D.C., office of Interface Engineering. “If there’s data showing that BIWP works and testimony that it’s a good thing to do, there will be an explosion,” he predicts…
Published in the April 2013 issue of Architectural Record Magazine. Read the whole story.
The Society of Environmental Journalists’ Miami conference energy tour forged forward today, pursuing better understanding of South Florida’s energy options in spite of a disinvitation by local nuclear reactor operator Florida Power & Light. Continue reading “Digging into Miami’s Turkey Point Nuclear Power Station”
“Don’t leave the planet to the stupid.” The corporate tag line from German solar module manufacturer Solon SE screams: ‘We reject complacency’ (not to mention gentility). It’s a slap-in-the-face warning to expect the unexpected, so I was looking for something completely different when I visited Solon’s one-year old Berlin headquarters on an architectural tour of Germany last week. I was not to be disappointed. What I found is probably the first cyclic elevator system installed anywhere in decades.
No pressing a button and waiting for a lift with this modern incarnation of a late-19th-C elevator design! In a cyclic elevator a string of passenger cars run by in a continuous loop. One simply steps into one of the open cars scrolling up or down through its adjacent elevator shafts and takes off. To your weary Canadian correspondent, presently immobilized in Berlin by an angry planet, the hassle-free transport offered by Solon’s cyclic lift was a source of almost drunken pleasure.
Unfortunately, it may also be quite stupid (so to speak). Continue reading “Life’s a ‘Paternoster’ (and then you fly)”
Indian carmaker Tata Motors is voicing concerns about the range and durability of the compressed-air powered minicar technology that I critically analyzed for IEEE Spectrum this month (see “Deflating the Air Car”). Tata Motors invested in French air car developer Motor Development International (MDI) in early 2007, but yesterday Mumbai-based news source DNA reported that Tata sees ongoing issues with MDI’s technology.
Tata already sells vehicles that run on gasoline, compressed natural gas, and liquid petroleum gas and is launching a battery-powered sedan in Europe. However, Tata Motors’ vice-president for engineering systems S Ravishankar apparently told DNA Money that the company’s efforts to add air-powered cars to its fleet are hung up by range limitations:
“Air is not a fuel, it is just an energy carrier. So a tank full of air does not have the same energy as a tank full of CNG. Any vehicle using only compressed air to run would face problems of range.”
When asked whether this means that “the ‘Air Car’ project [is] off?,” Ravishankar declined to comment. Instead, Ravishankar added that excessive cooling of the air car’s pneumatic engine is also presenting a challenge. Continue reading “Tata and Berkeley Frigid to MDI’s Air Cars”