Solar Power for a Sustainable City

Imagine a city where all electrical energy is from clean, renewable resources.  Does this sound like an implausible idea?  Well, this vision of the future is already in existence today and in one of the most famous cities in the world – Seville, Spain!  Seville is the fourth largest city in Spain and has been in the global eye for millennia.  It is where Ferdinand Magellan began the first voyage around the world and where the famous opera Barber of Seville calls home.  However, what makes it remarkable today is that it is almost entirely powered by solar energy!

How It Works

Seville gets over 3,000 hours of sunlight each year, which makes it a perfect place for solar energy.  The process works by focusing large mirrors called heliostats on a receiver which heats water into steam as it travels into a drum.  This is used to propel massive turbines creating electrical energy before being condensed back into water and beginning the trip all over again.

A solar tower power plant

The Solucar Complex

The Solucar Complex is where Seville will get all of its energy needs from.  It uses a wide range of technologies including solar towers and troughs.  As newer technologies are discovered, they have been incorporated into each new plant within the complex.  Its construction began in 2004 and the first tower, the PS10, began operations in 2007.

History

While the current Solucar Complex generates 180 megawatts (MW) of power, it has been a process to get there.  In addition, the total scope of the complex is only halfway built!  By the end of completion, it will have the capacity to generate power all of Seville, a city at almost 750,000 people.

The PS10 Solar Power Plant was the first completed portion of the complex, finished in 2007.  Capable of generating 11 MW or approximately 3% of Seville’s power needs.  This plant consists of 624 mirrors that heat water in a central unit and is the world’s first commercial solar tower. 

However, this was nowhere near enough for true power independence and a progression toward renewable sources.  The PS20 Solar Power Plant was added in 2009, capable of 20 MW.  It has double the number of mirrors and represents the 2^nd generation of solar technology which means that the energy conversion rate is higher as well.  It is the most powerful solar tower in the world.

The PS10 and PS20 towers

Combined, these towers account for 10% of Seville’s power requirements.  As of 2010, the construction of Solnova 1, 3, and 4 have massively boosted the complex’s capacity.  These are trough style parabolic mirrors that track the sun as it moves across the daytime sky.  Each of the three plants generates 50 MW, boosting the total capacity of the current complex to 180 MW or 60% of Seville’s power needs.

Future

There are still three more plants that are set to be completed in 2013.  There is the AZ20, a solar tower similar to the PS20 that will generate 20 MW of power.  There are also the Solova 2 and 5 trough plants, each with another 50 MW like their predecessors.  In all, this brings the total to Seville’s required 300 MW of power, all from solar energy!

The Solnova plants in front of the PS10 and PS20 towers

Benefits

The Solucar Complex is responsible for the creation of 1,000 jobs in construction and another 300 in operating the various plants.  It is estimated that over the course of the complex’s 25 year life expectancy, it will prevent 600,000 tonnes of carbon dioxide from entering the atmosphere per year.  This amount of carbon dioxide reduction would be similar to the amount that could be processed by almost 1.5 million trees!

Abengoa Solar

Abengoa Solar have been involved in the construction and operation of the Solucar Complex since its inception.  They operate a total of five complexes throughout Spain and one in Algeria.  They are involved in the expansion of these current complexes as well as new projects in the United States and United Arab Emirates.  They are also involved in complex operations in Chile and Mexico as joint projects with other companies.

The Green Revolution

Many other cities all over the world are joining the revolution to attain their energy needs from 100% renewable, non-polluting resources and it doesn’t just stop at solar.  Wind, hydro, and other energy alternatives are constantly being researched and improved to increase energy conversion rates and to make it affordable.  This is also the plan followed by new urban planners for new cities and growth. 

What makes Seville so unique is that they are actively building infrastructure for their city rather than buying offsets from other areas.  Essentially, their power grid is unique for their citizens.  As the sustainable movement continues to evolve, so too will new ideas on how to make it possible.

Sources: Abengoa Solar, Andalucia, Estela Solar, NREL, EERE, Power-Technology, ENS-Newswire, Indigo Guide, Destination 360, Bytelib

Sustainable Urban Planning

What is Urban Planning?

Urban planning is the branch of architecture dealing with the design and organization of urban space and activities, including the physical arrangement of the cities and the condition they are in. Cities have employed planners to lay out their infrastructures for years and, like many professions, urban planning has developed over time to reflect the changes in our society and our planet.

Historically, urban planning was primarily concerned with the placement of certain things near other things (i.e. a waste treatment plant should be far away from an elementary school, but a park could be nearby). As the awareness of climate change has grown, and a general shift has been made to a more eco-friendly way of life, urban planning can now take sustainability to heart and begin building greenest cities from the ground up.

How can a city "Go Green"?

These days it’s hard to say exactly what makes a city “green”. As creativity and innovation thrive, new and better ways to live environmentally friendly are constantly being revealed. Any step in the right direction is a good one and, lucky for us, there are many ways for our cities to show their green sides.

Clearing the clutter

Urban sprawl is the uncontrolled spread of urban development into neighboring areas; much like organizing your closet or defragmenting your computer, putting stuff where it belongs can greatly increase the available space you have by maximizing the space you use. Urban planning that reduces sprawl is considered green because it increases the density of city infrastructure and fits the same amount of “city” into a smaller area. Cutting back sprawl can positively impact a city’s sustainability in a number of ways:

Wildlife Refuges

When a city is compact, land that would have otherwise been used by sprawl is left in a more natural state. This provides opportunities for wildlife habitat and also acts as a reserve for native plant species. Available wildlife habitat keeps wildlife and humans both safer, and interactions to a minimum. The forests and vegetation that grow on this land will also act as a natural water filtration system and a carbon sink.

The city of Seattle, Washington comprises over 54,000 acres of land; of this, more than 6,000 acres is green space. The city’s Urban Wildlife and Habitat Management Plan lays out guidelines for managing land such that crucial wildlife habitat is left undisturbed. Land that is considered to be of particular importance for wildlife is acquired by the city to prevent its development, and green spaces are linked whenever possible.

Food Security

In addition to threatening natural ecosystems, urban sprawl threatens farmland. As the need for growth in the city centre pushes the city limits outwards, productive farmland is bought up and developed for other uses.  This increases a city’s dependence on food grown out of town or overseas.  When food isn’t grown locally, it requires large input of energy (usually in the form of fossil fuels) to transport it to where it will be consumed. 

To help protect farmland, the Town of Oliver, BC, collaborated with Land and Water BC to create the Wine Village and Kettle Valley Railway Plan. The plan conceptualizes a compact, pedestrian-friendly village with mostly multi-family dwellings. Surrounding the village is fertile wine country, agrotourism to which is marketed by the village in order to give agriculture in the area a boost and ensure continued production.

Fossil Fuel Use

It’s not just food that uses up fossil fuels to get around!  When a city begins to sprawl, opportunities to take alternate forms of transportation begin to diminish. People become reliant on their cars to get around, since walking, cycling, or public transit are often no longer viable options. Air quality suffers, as does the health of the individual who is now hopping in their car instead of hopping on their bike.

BedZED, short for Beddington Zero Energy Development, is a multi-use planned community in London, England.  It includes both residential and commercial spaces, and has been built to be carbon neutral.  Ideally, workers in the office space would live in the residential buildings and be able to walk neatly to work. 

Affordability

Another unfortunate, and probably less thought-of, effect of urban sprawl is its effect on our pocket book.  Whenever new housing developments or commercial properties are built, the infrastructures to support them need to follow.  Tax payers end up footing the bill for extra roads, sewers, water, and electric that wouldn’t be necessary in a more compact city layout. 

In Vancouver, BC, zoning bylaws were amended in 2009 to allow a secondary dwelling structure on many previously single-family lots. The secondary “laneway” house can be as large as 750 square feet, depending on the size of the lot. Laneway houses can be used as guest houses, as in-law suites, or as rental properties to increase the homeowner’s income. 94% of lots outside of Vancouver’s downtown core were affected by the zoning change. The potential for increasing residential without rebuilding is huge, and all without creating the need for new roads or sewers.

Where to start?

For the city that’s ready to make the first step, there are many resources available to help. British Columbia’s Ministry of Community Development has published an e-book, A Guide to Green Choices, aimed directly at communities looking to improve. The BC Climate Change Council offers Sustainability Facilitators and planners free of charge to local BC community governments.  Outside of BC, consultants such as PlanGreen will help communities establish policies and meet their environmental goals. 

What can I do?

There are lots of things you can do to help your community reach its green goals!

Contribute to infilling

Infilling is the process of increasing the density of a city by replacing or adding to existing developments. Infilling reduces urban sprawl and helps to prevent habitat loss and unnecessary infrastructure. You can help in a couple of ways:

• Consider a dwelling in a multi-family development, such as a condominium or a town-home.
• Give tiny houses a chance! In areas where lane-way houses are allowed, consider downsizing your life and living in a tiny house or a small house.  Seven hundred and fifty square feet may seem small, but a tiny house done right can pack a lot of house into a little space. Check out the Tumbleweed Tiny House Company to see floor layouts of dwellings under 900 square feet.

Make yourself more food-secure

Food security is a term that’s used when talking about how stable our food supply is. When food is shipped in from overseas, it is not a secure food system. Something like a fuel shortage or a political disagreement can disrupt shipment and leave us hungry. To help make yourself more food secure, try some of these ideas: 

• Support local farmers. Farmers markets are a great place to buy produce, and they’re a lot of fun, too. Supporting our local farmers ensures they are there when we need them.
• Grow your own food if it’s possible. Find a community garden, or dig a plot in your backyard. Even a container on your patio helps a little.  Looking for more space to grow or have space to spare? Maybe a yard-sharing program is for you. Yard sharing programs connect people who need space and people who have unused property. In Metro Vancouver, you can check out Sharing Backyards. 

Plan your commute

• Live as close to work as you can. If you can walk or cycle to work, you are not using any fossil fuels. You’ll find you also free up all sorts of time if your commute is suddenly cut in half.
• Use public transit if you can
• Is there an option for you to telecommute? Take it whenever possible, even if it’s only one day a week, every little bit helps.
• If you can’t manage without your car, carpool! If it’s an option for you, you could also consider vehicles that use alternate forms of energy, such as natural gas or electricity.     

Be part of the solution

Most importantly, get involved! It’s your community, make it into what you want it to be. Stakeholders of the Resort Municipality of Whistler, BC, together with municipal staff, created a document they called the Whistler Environmental Strategy (WES). While the Municipal Council didn’t endorse the project, the resulting document has still influenced the decision-making process within the municipality. Several areas of environmental concern outlined in the WES have been further investigated and included in budgets and plans. Your voice can only be heard if you say something.

Sources: Seattle.gov, Coach House Builders, Plan Green, CSCD, Infrastructure, Vancouver, Wallpapers, Tumbleweed Houses, Blogspot Image, Macleans, CSCD

Bixi Bikes Coming to Vancouver

We're thrilled to see progression in the plan to introduce Bixi bikes to Vancouver as the Velo-City Conference was attended late last month: 

Bike share is coming to Vancouver, and we must make it work

The international Velo-City conference is underway in Vancouver as of Tuesday morning and I arrived in time to hear an inspired talk by urban cycling advocate Gil Penalosa. Judging by the Twitter activity throughout the morning, Penalosa's message excited the full house in attendance at the Wall Centre. While Penalosa's full presentation — available here — is fast-paced and rich with detail, it was nicely summed up by an Australian delegate named Stephen Yarwood.

Given the way the Vision council have married themselves to the cycling issue, it was perhaps predictable that the site of the Velo-City conference felt like an offsite City Hall. Mayor Gregor hung around to do interviews while his chief of staff parked himself in front of the venue most of the morning. Even Penny Ballem paced around the site. The always affable Jerry Dobrovolny, Vancouver's Director of Transportation listened intently to Penalosa's speech, which he quipped might put him out of a job. Penalosa's message was to be bold, to be fearless in the face of public opposition, and to make cities as safe as possible for cycling with many miles worth of separated bike lanes. Vancouver, said Penalosa, has not been nearly bold enough when compared to cities like Chicago.The real star of the show that morning, however, were the over 600 Bixi bikes shipped in for the conference and parked in front of the Wall Centre convention facility. Bixi is the Montreal-based bike share manufacturer that will be providing the two-wheeled transport for Vancouver's bike share program. The operator for the Vancouver bike share will be the Alta company based out of Portland, Oregon.

I had the pleasure of having my first bike share experience, after I signed an insurance waiver and gave conference organizers a stamp of my credit card. To get access to a bike I simply inserted the card provided by Velo-City, waited a few seconds for the light to turn from red to green, and pulled the bike out while slightly lifting the rear of the bike from the seat. With my complementary Lazer bike helmet strapped on I took a short ride downtown. 

The Bixi bikes are beautiful machines. They are definitely more sturdy than your typical hybrid or road bike, and sport wide tires with a street-friendly tread. The seat is wide and comfy, something many casual riders prefer. 

The seat post – which I got a blurry image of – is easily adjustable, and thankfully you're not able to easily slide the seat and post right off the bike. That would be a big target of theft otherwise. 

My demo bike was a three-speed but the bikes on order for Vancouver's bike share will be a seven-speed bike to better manage our city's hilly terrain. The gear changer is located in the right half of the handlebar, and the left side has a small bell you can ring with your thumb when needed. There is a small amount of space over the handlebars to locate a small basket if necessary. 

The brakes are built into the wheel hubs, and while you're riding enough power is generated to run safety lights embedded into the frame of the bike, improving your visibility in traffic. Overall it's a solid and comfortable ride, but the slightly heavy frame had my quadriceps burning up a few hills. For all my Bixi bike images see this Flickr set... Read the full story at City Caucus

Bicycle sharing programs have been active in many cities throughout the globe, much like car-shares and other eco-transportation services that are new to Vancouver. As part of Vancouver's Greenest City Action Plan we are expecting to see a significant increase in bicycle transportation services and improvements. The increase in bikes and bike lanes pose a natural deterrent to motor vehicles as those that are inclined to choose cleaner modes of transportation can with ease, and those that prefer to utilize motor vehicles may chose to go elsewhere. The city's green transportation initiatives focus on walking, cycling, transit, and greenways. By designing streets with pedestrian priority, expanding the bicycle network, improving public transit, and increasing public green space, one can imagine a healthier, greener city in the future. Bixi is expected to be active in Vancouver by 2013.


Watch here to learn more about Velo-city Vancouver:

Sources: City Caucus, Bixi, Vancouver Greenest City, Velo-city, Vancity Buzz, UBC Transportation

Troc-Exchange: A Vancouver Bartering System To Reduce Waste

Inspired by an exchange in Europe, Christine and Yvan Saché developed Troc-Exchange.com, a values-driven Craigslist-style website in Vancouver that returns revenue to charities that create environmental changes. The program targets two significant areas of impact: to reduce excess waste and support environmental improvement.

Collaborative consumption is a worldwide trend that TIME Magazine has named as one of the 10 Ideas That Will Change The World. Programs such as Zip Car are popping up all over the world as individuals support this idea. Sharing and trading goods are simple ways to get rid of things you no longer use and acquire things you want without having to add to the products on the planet. Through this type of exchange we can reduce waste and protect our environment.

Bartering is the core of the Troc-Exchange concept. The website's platform is designed to encourage the exchange of goods and services but also provides alternative options to donate or purchase. Individuals can post ads for free and participate in clothing swaps to allow people to see a variety of items at once and make exchanges in person.

Their largest clothing swap was on April 21st at the Projecting Change Film Festival where 100% of the proceeds went to Surfrider Vancouver to help beach clean up on Earth Day. We encourage you to contact them for more information on upcoming swaps and let them know your level of interest so these events can grow.

In addition to fighting waste, the vision of Troc-Exchange.com is to raise funds for associations and foundations of volunteers that are working for the well-being of the planet. The company is funded by sponsors and 50% of their revenue goes to environmental organizations which include groups in Vancouver and worldwide. Their Vancouver chapter is also 100% volunteer run.

The team at Troc-Exchange believes when you participate in this system your are defending the environment for today and for our children tomorrow.

Learn more at Troc-Exchange.com - About

Swap Day with Troc-Exchange