AC Buzz

Sunny Barcelona puts the rays to work

Casa_solar_Smartcity_Barcelona(By Laurie Guevara-​Stone/CSMonitor) Barcelona may be famous for Gaudí’s modernist architecture and its world-class Picasso museum, but there’s something else for which the city of 1.6 million should be known: its commitment to sustainability. In fact, Barcelona’s solar energy regulations have become a model for other municipalities following the city’s example.

Solar hot water

In 2000, Barcelona became the first European city to have a solar thermal ordinance. All new buildings and existing buildings undergoing major renovations are required to use solar panels to supply 60 percent of their hot water requirements. Swimming pool heating must be met 100 percent from solar energy. The ordinance applies to all commercial buildings and all residential buildings with more than 16 apartments. This policy has increased the amount of solar thermal panels in the city 4,000%, from 1.1 square meters per 1,000 people in 2000 to over 40 square meters per 1,000 people today.


The policy has been so successful that 70 other municipalities in the country replicated it, and in 2006 the Spanish government became the first in the world to enact a national building code requiring the installation of solar panels for hot water.


Putting waste to use

Another goal of the Barcelona Energy Improvement Plan was to greatly increase the city’s use of renewable energy sources. Besides the abundant solar energy that falls on Barcelona, the city also produces a lot of organic waste. City officials decided to use that waste for some of their heating and air conditioning needs.

In 2002, Barcelona installed a district heating and cooling system that relies on urban waste. The biomass for the CHP plant, called Districlima, comes from maintenance of the city’s numerous parks and gardens (approximately 7,200 metric tons per year) and maintenance of the outlying forests (another 28,000 tons per year). It has grown each year. A second power plant was added in 2012 to handle power peaks. There are now 15 kilometers of pipes and 80 connected public and private buildings, the largest district heating and cooling network in Spain, with 74 MW of cooling power and 52 MW of heating power. The system reduced CO2 emissions by 17,500 metric tons in 2013—the equivalent of planting 875,000 trees, six times more trees than the city currently has.

Tackling transportation

0808-spain_standard_600x400BarHowever, the main emitter of greenhouse gas emissions in Barcelona was the transport sector. So part of the energy plan was developing public transport infrastructure. Barcelona’s transport system, Transports Metropolitan de Barcelona (TMB), runs all the city’s buses and the Metro.

The TMB bus network, which transports 190 million passengers per year, has one of the cleanest bus fleets in Europe, with 400 natural gas vehicles, 82 hybrids, and the rest (approximately 500) with particulate traps that reduce annual emissions of NOx (71%) and particles (85%) for each bus. TMB is also currently testing a pure electric bus with a range of 120 miles, enough to cover a full-service urban line. The city also has more than 500 hybrid taxis, 294 municipal electric vehicles (such as for trash collection and streetlight maintenance), 262 public charging stations, 130 electric motorbikes, and an estimated 400 private electric vehicles on its streets.

Bicing is Barcelona’s bike share program, inaugurated in 2007. Bicing has 6,000 bicycles at 400 stations throughout the city. There are currently over 121,000 users generating 14 million trips per year on the city’s 181 kilometers of bike lanes. Approximately 50 percent of all trips in the city are currently made on foot or on bicycle, and only 20 percent of trips in the city are made by private vehicles. Barcelona also launched the world’s first electric scooter sharing program, MOTIT. All a commuter needs is a smartphone to reserve a scooter that can be picked up and dropped off at numerous locations around the city. The bright purple scooters go 40–60 kilometers on a single charge and even come equipped with a helmet.

The City also implemented smart parking spaces to help reduce the amount of time spent searching for parking. Sensors detect if a parking spot is vacant, and drivers can get the info on their smartphones. The sensors also provide data about parking patterns helping improve management of urban mobility.

In 2011 the Barcelona Energy Agency drew up a second energy plan called the Energy, Climate Change and Air Quality Plan of Barcelona, which includes 108 projects to reduce energy consumption and greenhouse gas emissions and to improve air quality and energy supply systems. The plan includes implementing more renewable energy systems, increasing efficiency, and promoting transportation alternatives.

All of these measures have helped Barcelona become a leader in sustainability. Barcelona has one of the lowest per capita greenhouse gas emission levels in the industrialized world, at under 4 metric tons of emissions per person per year (Houston is at 14.1 and Paris is at 5.2). And the city is still moving forward. “In 2020 Barcelona could be a more environmentally conscious city,” according to Irma Soldevilla i Garcia of the Barcelona Energy Agency, “in which careful energy consumption will be a regular part of people’s lives.”

Read the full post on CSMonitor

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