That means collecting every drop of rainwater that falls onto the floating city by using every paved surface and roof to capture the water and direct toward somewhere it can be stored—this is the most ideal water source because it requires no energy to collect. A second water source would be the ocean. These could be particularly effective in the tropical climates where the first Oceanix cities would be prototyped. The team is also exploring ways to treat as much graywater as possible so it can be reused. One idea? To collect graywater in natural pools, where it can be filtered through a biological system.
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These pools would also add to the aesthetic beauty of the islands. What does that mean? Some crops would be grown outdoors—an estimated 32, square feet on each hexagon would be devoted to food cultivation. Much of that would be outdoors, since the sun uses the least amount of stored energy, and the crops would double as green space for residents. But according to Clare Miflin, the cofounder of the Center for Zero Waste Design, a floating city would also need to experiment with other ways of growing food. One possibility: outdoor vertical farming for crops like lettuce.
Aquaponics, in which plants grow hydroponically and are fertilized with fish waste, has a deep precedent—the Aztecs used aquaponic farming on their own floating agricultural islands many centuries ago. With food comes food waste. Miflin wants to create a circular system where all food waste is turned into nutrients for the soil through composting. Food waste would go through a pneumatic system of pipes directly to an anaerobic digester to start the composting process. Miflin believes that it would be crucial for the floating city to only use reusable food containers , with centrally located drop-off points for people to put their empty containers; from there, they could be cleaned centrally and reused.
Miflin thinks that the mentality of reusing food packaging would have to apply to all objects on the floating city. That means that a sharing-based economy for goods would dominate.
People would lease more expensive items like personal electronics or computers rather than buying them, and just return them to the store when they are finished so the materials can be refurbished and reused. That also means that everything would need to be designed to be repaired and eventually disassembled. When something has absolutely reached the end of its life, the waste would be sent through the pneumatic tubes or put into a reusable bag, tagged with a RFID sensor to track where the waste came from, and then whisked away to a sorting center.
Miflin believes this would incentivize people to cut down on their waste as much as possible. The distance is closer in scale to the size of neighborhoods before cars—and the team envisions that having a smaller community would have a positive impact on how much people would really need extensive, energy-draining transportation options.
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That brings us to energy. Every other system—food, water, waste, transportation—ultimately feeds into energy.
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Erik Olsen, the managing partner at Transsolar KlimaEngineering, thinks that for floating cities to be viable, each resident would need to have an energy budget—something that will make everyone think twice about what they really need to use energy for. That budget would be their share of all the energy that the city can generate on its own, using solar power, wind, and even generating energy from ocean waves.
A key way to reduce energy use? Minimize how much electric transportation people use why the floating cities would be designed to be walkable. The biggest energy suck is actually agriculture , particularly indoor agriculture. Growing food outdoors would be crucial to minimize energy usage in general.
On top of that, buildings, especially in the tropics, can be much more porous and use far less air-conditioning than they do currently. Ultimately, Olsen thinks that having an energy budget per person would only work if the low-energy choices are just as good as the high-energy choices.
There are hosts of problems yet to be figured out, and much of the technology to make this happen will need to be either invented from scratch or wholly adapted to fit the floating city. Who will govern these places? The project is aimed at developing a sustainable eco-friendly energy and water-independent community in small island areas. Considering the natural environment and geographical features of the project area, we are developing small villages or communities through eco-friendly energy sources based on a hybrid power system.
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The hybrid power system consists of a small wind turbine, a photovoltaic panel, a pumped storage hydroelectricity and energy storage system. The renewable energy hybrid system can provide stable electricity and water to the island without greenhouse gas emission by fossil fuels. Since , Incheon city has been promoting the development of eco-friendly islands centered on Deokjeok-do. Deokjeok-do is at the center of zero carbon island development. The Korea Institute of Civil Engineering and Building Technology has signed a memorandum of understanding with Incheon City and is participating in the eco-island project centered on Deokjeok-do island.
A local community in Deokjeok-do, Incheon city, was selected in to be developed as an environmentally-friendly energy and water independent community. A hybrid power system based on a small wind turbine, a photovoltaic panel, a pumped storage hydroelectricity and energy storage system was built. Through this arrangement, electricity is supplied to the community without diesel power generation. Besides eco-friendly energy independence facilities, self-supporting water facilities were also installed.
Facilities that use rainwater, valley water and groundwater were developed and built. In addition, the pumped power generation system uses surplus electricity generated by wind power and solar power to move the water in the lower storage tank to the upper storage tank. By using the water stored in the upper storage tank, it is possible to automatically supply water to the surrounding crops. Currently, the local community in Erumsil Village produces and uses electricity and water by itself without power and water supplied from the outside sources.
Many small islands have no electricity supply, and some islands use diesel generators, which are powered by fossil fuels. In order to supply eco-friendly electricity to the island, it is necessary to develop and electricity and water supply systems using the natural environment wind, topography, etc. In order to develop an eco-friendly island, it is necessary to produce electricity, heat and water independently with renewable energy as the source. A grid that connects them efficiently is also needed. In this project, the hybrid power system consists of a small wind turbine, a photovoltaic panel, and a pumped storage hydroelectricity and energy storage system.
The renewable energy hybrid system provides stable electricity and water to the island without greenhouse gas emission by fossil fuels. Providing water and eco-friendly energy self-supporting facilities in small islands improves the lives of residents and protects nature.
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