LAVA designs heart of Masdar, world’s first sustainable cityGiant umbrellas, with a design based on the principles of sunflowers, will provide moveable shade in the day, store heat, then close and release the heat at night in the plaza of a new eco-city in the United Arab Emirates.The ‘sunflower umbrellas’ are one aspect of the winning design by the international practice Laboratory for Visionary Architecture [LAVA] for the city centre for Masdar in the UAE - the world’s first zero carbon, zero waste city powered entirely by renewable energy sources.Masdar is a planned city located 17 kilometres from Abu Dhabi. A government initiative, the city is being constructed over seven phases and is due to be completed by 2016.The city centre includes a plaza, five-star hotel, long stay hotel, a convention centre and entertainment complex and retail facilities.LAVA won the design in an international competition in 2009 against several hundred entries and strong competition from some of the world’s most high profile architects.Masdar City is the world’s most prestigious project focusing on sustainable energy design. It is the city of the future and a global benchmark for sustainable urban development. The Masdar slogan is “One day all cities will be like this”.The solar powered ‘sunflower’ umbrellas capture the sun’s rays during the day, fold at night releasing the stored heat, and open again the next day. They follow the projection of the sun to provide continuous shade during the day.The sunflower principle is eco-friendly and can be adapted to anywhere in the world – it opens opportunities for outside living, even in the desert.Some other key innovations of the winning plan include:• Building façade angles that can be altered to offset or optimise solar glare.• Materials on wall surfaces respond to changing temperatures and contain minimal embedded energy.• Water features can be stored underground during the day and at night trickle or flow strongly, triggered by passersby.• Interactive light poles, inspired by the oasis fire, transform the plazainto a 3-dimensional interactive media installation.• Interactive, heat sensitive technology activates lighting in response to pedestrian traffic and mobile phone usage.• Roof gardens integrate food production, energy generation, water efficiency and the reuse of organic food waste.The idea behind LAVA's concept is the use, inspiration, and adaptation of nature and the plans combine innovative design and sustainability.East and west are fused in the plaza design inspired by both the oasis, as the epicenter of Arabic nomadic life, and the iconic piazza of historical European cities. The organic forms created by the forces of natural erosion in geographical landmarks such as great canyons and wadis are the design inspiration behind the key buildings in the city centre.After winning stage 1 in January 2009, LAVA teamed up with the Sydney/Dubai based Kann Finch group, engineering firm Arup (with whom Chris Bosse previously worked on the Watercube in Beijing), Transsolar (worlds leading energy consultancy), and a team of international experts.