Posted April 8, 2008 1:20 PM by Brent Ehrlich
Related Categories: Science & Tech, Nature & Nurture

One summer day a few years ago I was standing on the rim of the Grand Canyon expecting to look down and across at light and shadows melding with multicolored layers of bedrock, the whitewater from the Colorado River calmly glistening a mile below as it carves through rock and time itself... etc etc. Instead, I found my gaze drawn to a line of gray clouds blowing in from the west. They didn't look like rain clouds, and it wasn't long before I discovered it was smog carried on the wind all the way from Los Angeles. I did spend part of that day contemplating the vastness of nature and the power of time, but it was done through a haze of personal guilt. I had just come from a wedding in LA and was sightseeing my way back to Colorado. Part of that cloud was most certainly mine, just as the 3-D explosions of CO2 shown here engulfing most of the U.S. and beyond are collectively ours.

Text accompanying the video: "A new, high resolution, interactive map of United States carbon dioxide emissions from fossil fuels has found that the emissions aren't all where we thought. The maps and system, called Vulcan, show CO2 emissions at more than 100 times more detail than was available before. Until now, data on carbon dioxide emissions were reported, in the best cases, monthly at the level of an entire state grid. The Vulcan model examines CO2 emissions at local levels on an hourly basis. Purdue researchers say the maps are also more accurate than previous data because they are based on greenhouse gas emissions instead of estimates based on population in areas of the United States."

More at Purdue's website.

Posted April 2, 2008 2:15 PM by Michael Wentz
Related Categories: Google Earth/Sketchup, Science & Tech

A beta version of the Energy Design Plugin for Google SketchUp has been released by the Department of Energy.

From the Energy Design Plugin website: Designed to integrate seamlessly with the SketchUp environment, the plugin allows you to use the standard SketchUp tools to create and edit EnergyPlus zones and surfaces. You can explore your EnergyPlus input files by using all of the native SketchUp 3D capabilities to view the geometry from any vantage point, apply different rendering styles, and perform accurate shadowing studies. The plugin allows you to mix EnergyPlus simulation content with decorative content such as background images, landscaping, people, and architectural finish details--all within the same SketchUp model.

I saw an almost-working version of the plugin at Greenbuild in Chicago while meeting with a DOE colleague, but a spotty Internet connection and some remaining bugs (that I'm guessing they've mostly worked out) kept me from getting the first-hand tutorial. Unfortunately, I'm on a Mac and the plugin is only working on Windows so far, so I will either have to wait until I can install Windows on my machine or it is released for Mac.

For more information and to download the plugin for free, go to: http://www.energyplus.gov/energy_design_plugin.html

And for more on building information modeling, see the Environmental Building News article Building Information Modeling and Green Design.

Posted April 1, 2008 1:06 PM by Mark Piepkorn
Related Categories: Science & Tech, Miscellania, Nature & Nurture

Down To Earth Building Bee (Vancouver, BC, Canada) had a shake test on a half-scale model of a cob structure done at the UBC Earthquake Engineering Research Facility. It happened a while ago, but they just posted video:

The model was of a circular structure with a shed roof, described as "about 6 ft diameter and 5 ft high"... not representative of houses in the developed world, but a start for more research. There was a small window on the rear, which is easy to miss in the video. (Fenestrations normally weaken a structure, so they're important to include.) There also doesn't appear to be a stemwall — highly recommended for cob buildings, and another likely point of seismic catastrophe.

Read more...

Posted March 24, 2008 11:37 AM by Mark Piepkorn
Related Categories: Science & Tech

The Riverdale NetZero Project in Alberta, one of Canada's first net zero energy houses (and it's a duplex, too), has a website. And on this website, there's a large (10MB), 98-slide presentation chock full of enlightening and thought-provoking stuff ranging from what "net zero energy" means, to how they did it. A very good introduction for people not entirely familiar with all of the concepts involved, and a nice case study for those who are.

For greater detail, they also offer the project's technical proposal.

For a straightforward exposition on the subject of net zero energy, see the Environmental Building News feature, Getting to Zero: The Frontier of Low-Energy Buildings, which explores the concept of zero-energy — what it means, why it matters, and how to get there. And find more on net zero energy in the BuildingGreen Suite.

Passive survivability is something else to keep in mind as well...

Posted March 10, 2008 8:59 AM by Mark Piepkorn
Related Categories: The Industry, Science & Tech, Product Talk

The current issue of Environmental Building News reports that PV prices have been going up, reversing the declining cost trend of previous years. Seems to be due to a combination of demand exceeding supply coupled with polysilicon shortages.

But PV is still part of the good answer. A few days ago, a report titled Emissions from Photovoltaic Life Cycles was released, authored by representatives from the PV Environmental Research Center of Brookhaven National Laboratory (New York), the Center for Life Cycle Analysis of Columbia University (New York), and the Copernicus Institute of Sustainable Development of Utrecht University (The Netherlands).

From the abstract:

"Based on PV production data of 2004–2006, this study presents the life-cycle greenhouse gas emissions, criteria pollutant emissions, and heavy metal emissions from four types of major commercial PV systems... Overall, all PV technologies generate far less life-cycle air emissions per GWh than conventional fossil-fuel-based electricity generation technologies."

For more, see Low Emissions, Quick Energy Payback for Thin-Film PV.

Posted February 19, 2008 12:07 PM by Mark Piepkorn
Related Categories: Behind the Scenes, Science & Tech

I tagged along with Tristan Korthals Altes, top-notch managing editor of Environmental Building News, on an interview with a global distributor of carbon nanotubes who just happens to be located in our little Vermont town. Tristan's working on a feature story on nano technology for the newsletter, and it's shaping up to be quite something to anticipate.

I put together a quick seven-minute edit of the recorded interview with Mike Foley of CheapTubes.com, in which he gives his take on what nanotubes are good for; what they look like; potential health effects; how nanotubes are made; the business he's in; what they cost; the past, current, and future marketplace of nanotubes; and how nanotubes can play the guitar solo from "Layla."

This post isn't an endorsement or a representation of BuildingGreen's position on anything or anyone; it's just a brief presentation of some perspectives of a colorful guy in an interesting field.

Download or stream:

"There's one thing worse than being young and full of stormy tantrums, and that's being old and backward-looking and crotchety."

So said Bruce Sterling (author, thinker, critic, doer) in this year's annual rollicking and roving discussion of the state of the world at The Well — the still-kicking "Whole Earth 'Lectronic Link" founded by Stewart Brand and Larry Brilliant in 1985 (more than 20 years ago!) for the writers and readers of the seminal, sadly defunct Whole Earth Review. Among much else, Bruce is the instigator of the Viridian design movement, described as a confluence of "environmental design, techno-progressivism, and global citizenship," from which grew the popular Worldchanging website, and more recently, book of the same name.

The turn-of-the-year conversation is still unfolding. A freewheeling email discussion presented chronologically, it can be slightly trying to follow — but the thoughtful, informed, witty participants make it so worth the effort.

After the jump, I've excised some quotes from Bruce Sterling that range from insightful to wry to what some might find abrasive, depressing, and contrary. It was not only difficult to choose which to include here, but also took strength limiting myself to just the "headliner." There's a lot of thought-provoking material throughout from others.

Thanks to the lovely and brainy-hilarious Jeanine Sih Christensen of greenbuilder.com for reminding me of this once-a-year treat.

Read more...

Posted December 21, 2007 1:17 PM by Alex Wilson
Related Categories: Science & Tech, Product Talk

[Clicking an image in this post will load a larger version of the image. A slideshow of the images in this post, and more, is also available. Previous posts in the "Notes from Sweden" series include #1: How They Get Around, #2: Western Harbor in Malmo, and #3: The Scandinavian Green Roof Institute in Malmo.]

In Brattleboro, Vermont, I'm involved in an effort to establish a wood-chip-fired combined-heat-and-power (CHP) plant that will — if we can pull it off — generate power and provide district heating through a network of buried, insulated pipes. It's pretty exciting, really. While district heat is used in many large cities, university campuses, and medical complexes, there are no systems I am aware of that serve smaller towns. Brattleboro could be the first!

Brattleboro could have the first small-town district heating system in the United States, that is. In Europe — especially Northern Europe — district heating is very common. Half of all buildings in countries like Sweden and Denmark are heated in this way. I've been learning a lot about this on my travels here.

Read more...

Posted November 20, 2007 5:00 PM by Mark Piepkorn
Related Categories: Science & Tech, Events, Greenbuild '07, Product Talk

It's not all about magnets. Two other nonchemical water treatment systems that have exhibited at Greenbuild for at least the last couple years are worth noting... for one reason or another.

During the '06 show in Denver, I spent some time learning about the VRTX—say it "vortex"—sidestream "hydrodynamic cavitation" and filtration system. The company was there again this year. As I understand it (and please do understand that I don't claim to really understand it), it works by blasting two spinning, high-velocity cones of water into each other, which releases high localized heat, creates a strong vacuum, and generally bangs things into each other.

A paper assessing an installation at the Ford Motor Company describes it like this:

Read more...

Posted November 19, 2007 3:15 PM by Michael Wentz
Related Categories: Google Earth/Sketchup, Science & Tech, Books & Media

I want to show off something that we have been working on that I'm really excited about. Working with the Department of Energy and Google, we created a High Performance Buildings layer in Google Earth. The layer gives you an interactive map with markers for the buildings in DOE's High Performance Buildings Database, with links to full case studies. Even cooler, you can download and view 3D models of the buildings (that were created in SketchUp).

If you have Google Earth, you can download the layer here:

Great Green Buildings Google Earth Layer

If you don't have Google Earth, you can download it here.

You can find the 3D models in the Department of Energy collection of Google's 3D Warehouse.

This layer is only the first step of our Google Earth/ SketchUp project. There will be more coming, so let us know if you have any suggestions.

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