I just returned from the Solar Decathlon in Washington DC,
where 19 teams of college and university students are competing to design and
build the best energy-efficient house powered by the sun. Each school has constructed their home on the
mall, a net-zero building between 600 and 1,000 square feet.
This is the fifth US Department of Energy Solar Decathlon,
and there are a few noticeable differences since it first started in 2002. The biggest change is the location. Previously located on the main stretch of the
National Mall, under the shadow of the Washington Monument, the event this year
was relocated to a slightly more remote location, on the edge of the Tidal Basin
near the FDR Memorial. (The Park Service
claimed the construction vehicles were destroying the grass. Jeesh!)
But being off the beaten path didn’t seem to do anything to keep the crowds
away, as long lines began forming by early afternoon on this overcast Saturday.
The other major changes to this year’s Solar Decathlon have
to do with the structure of the competition itself. Each house is measured or judged in the
following 10 categories:
- Architecture
- Market Appeal
- Engineering
- Communications
- Affordability
- Comfort Zone
- Hot Water
- Appliances
- Home Entertainment
- Energy Balance
It seems the Department of Energy has an agenda this year to
spread the message that going ‘green’ is affordable and within reach, so
they’ve tweaked the rules a bit to appeal to the skeptical American homeowner.
One of the students on site explained to me that at the 2009 Solar Decathlon, the winning German team spent $1.2 million on their house,
covering every possible surface with PVs to maximize their energy
production. Up until now, students were rewarded for
producing surplus energy beyond net-zero.
Each team was given an electric car to drive around town on the surplus
energy they produced, racking up miles and points.
In response to the excessive spending, a few changes were
made that alter the focus of the event.
First off, a new category was added this year: Affordability.
Each house is assessed by a construction estimator, and if
the total cost comes in below $250,000, the team is awarded the full 100 points
in that category. As the cost goes up,
the number of points are reduced, down to zero points awarded for a cost of
over $600,000.
In addition, there are no longer any rewards for producing
surplus energy beyond that which the houses consume. At previous Decathlons, the houses were
off-the-grid, so each home relied on a large bank of batteries to store extra
energy. This year, there were no batteries
in sight. A miniature utility grid was
constructed on site, and no additional points were awarded for energy produced
beyond net-zero.
Closely related to affordability is “Market Appeal”. In this category, each team determines who
their target market is, and their house is judged on its livability,
constructability, and “curb appeal”.
One of the most often asked questions is where the house
will be when the competition ends. One
of the teams chose to leverage the affordability aspect and design their house
for a family in need through Habitat for Humanity. The Empowerhouse is a joint venture of Parsons
the New School for Design and Stevens Institute of Technology.
Another school, the University of Illinois at Urbana-Champaign,
has designed their house as a rapid-response emergency solution for areas
affected by natural disasters. The Re-home
can be deployed quickly as an affordable, self-powered source of
shelter for those left homeless.
The most unique approach I found to market appeal was
from the City College of New York. Their
Solar Roofpod is designed to be placed atop an existing mid-rise urban
building, taking advantage of underutilized roof space and feeding energy to
its host building below.
But enough about affordability and market appeal. Let’s talk about what we really look for in
the Solar Decathlon: technological innovation,
creative solutions, and new products that have been exhaustively researched and
fully vetted by passionate students out to change the world. Big solutions to the big problem of global
climate change.
Tomorrow I will share some of these new products and creative
strategies that I found at the Solar Decathlon for making a better net-zero
solar powered home.
No comments:
Post a Comment