Edificio Energia Zero CONFERENZA STAMPA inglese

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The First Zero Energy Building in Florence (residential public buildings)

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The buildings of the coming future will be autonomous, producing energy from renewable sources to provide the house life. The goal is therefore is to keep three important parameters: high energy efficiency, zero energy and low costs! CASA SpA is working on the concrete project field to build 21 residential public apartments as fulfillment of the P.U.C. ex Pegna , next to via Gabriele d’Annunzio in Firenze. The planning approach is obviously innovative, trying to mix the efficiency of the buildings structure and the innovative technologies related to the whole thermo- and fluid-dynamic system of the building itself.

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The project is consequently structured as a coordinated amount of ideas and experiences, materials and technologies, used to reach the goal. Conceptually the project is founded on a particularly efficient building structure, entirely made of natural materials, adding the air supply (studies and simulations about the whole thermo- and fluid-dynamic behaviour has been conducted from the start of the project itself). It means that the external structure is built in order to conserve the heat in winter and to limit the warmth in summer, using the air to improve this system. This building clearly doesn’t need too much energy for the heating and for the air-cooling, producing it directly from renewable sources.

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Here are some points that illustrate the forcefulness of our planning ideas. The building basically needs (for heating and for air-cooling) 38,22 kWh/ mq per year: using a passive solar systems (greenhouse effect halls and loggia, muri di Trombe ), underground channels and ventilation towers the thermal energy need is altogether 12.04 kWh/ mq per year (just for the heating because the air-cooling need is zero. The building is made of wood, an ancient material for the building trade of the future!

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The external part of the structure is 33,20cm depth and assure a good performance with a wooden structural XLAM panel (13cm), an external thermal insulation made of wooden fibre (12cm), a cellulose fibre insulator (5cm) and a double plasterboard (2,5cm – insulating power V = 0,185 W/ mq K; the shutters have an insulating power glass+frame of 1,5 W/ mq K). The eaves’ projections, really accentuated, has been built in order to guarantee the shading in the most large area of the building during summer, helping the air-cooling without preventing the sun to radiate light and warmth in winter.

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Three large and high bioclimatic halls has been scheduled, in correspondence of the starway compartment, with an external glass partition with thin glass plate (that can be opened). Similar are the solar loggia, using an external glass partitioning system. The system of the greenhouse-halls, in winter, is helped by several Muri di Trombe . In the building there are 4 ventilation towers for the air coming from the underground channels system, channels that receiving the air from outside and leading it underground determinate the pre-thermal-treatment cooling the ground in summer.

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Here is a Classe A+ Building project: if it is possible to produce all the electric energy needed from a renewable source, the building is 100% Zero Energy and Zero Emissions! The future is just began!

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Today we are here ! 20 Class A apartments (residential public buildings) – PUE Giuncoli-Canova

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soon we will be there ...

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21 Zero Energy residential public buildings! Area ex Pegna Via G. D’Annunzio in Florence

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2020 = nearly zero energy buildings Zero Emissions Low Consumption 100% Energy from sustainable - renewable source

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HOW ? Playing like a = TEAM Increasing the value of = EXPERIENCES Trying new and different ways = INNOVATIONE SO WHAT? To Project and build “ nearly zero energy ” buildings

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Detailed analysis of the weather conditions of the site Lightning and sun exposure

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Detailed analysis of the weather conditions of the site Ventilation summer and winter

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The project fits perfectly in the given weather conditions and it is able to maximize lightning, sun exposure and ventilation and minimize the negative aspects (for example the summer sun exposure) Simulation of the real functioning conditions of the building in a dynamic situation

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The building structure (the external part) is made efficient using natural materials as wood coming from a short distribution chain.

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With the projectual solutions and the efficient external thermal insulation we can reach excellent results. Adding more systems, related to ventilation and natural sun exposure (bioclimatic halls, sunny loggia, air shafts, …), we can improve the energy efficiency of the building, reaching excellent results. The building needs a very little bit of energy for heat and zero energy for cooling ! And this energy is going to be produced by sustainable resources. thermal needs heating heating heating air cooling

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The plant design is advanced, focused on renewable energy sourches (the sun, the wind, the geothermal science…) low voltage network incoming network energy outcoming energy network photovoltaic PTO Standard schema of a photovoltaic system connected to the network

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The “friendly” plant design – home automation – is able to find a solution for every environmental situation’s change and to automatically integrate different devices, without operational complications for the occupants.

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The future is just began …

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