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Blasco Eco-House
Gandia. Valencia
280 m2
221,700 euros

1. Major objectives

- Designing a home energy self-sufficient.

- Designing a home with a bioclimatic architectural structure, so you do not need absolutely no heating in winter.

- Designing a home soda systems compatibilice bioclimatic architecture, with a green mechanical cooling system.

- Designing a home with a mechanical cooling system powered by solar energy only.

2. Architectural Solution

The property is located on a small lot near the beach of Gandia. The property is located diagonally into the plot looking for a perfect south facing to maximize solar radiation in winter and in summer avoid.

The property has a tripartite architectural structure, turning all areas covered central courtyard (greenhouse in winter, in summer crisper). This central space provides a vertical communication and architectural richness to the whole.

Users wanted a house that was completely self-sufficient from an energy point of view, and that in turn would generate a very cool in summer, and had no need of any type of heating in winter (the stove built into a wall load has a symbolic purpose).

The petition was resolved by providing housing a large glazed south, and giving it a huge thermal inertia, and a perfectly designed layout of walls captors. Thus, the housing can make the most of solar radiation (for which there is little) in winter, and use it to generate a greenhouse housing enough to ensure the welfare of its occupants.

These huge glass surfaces are protected effectively in summer, with a combined shading of various types, so that solar radiation-direct and indirect-not hot housing. However, given that housing is designed to be a perfect solar collector, and also given the space requirements have extremely cool in summer, there is provided a mechanical cooling system, powered by photovoltaic electricity. The decision to install a mechanical cooling system is further reinforced by the customer's desire to lower the maximum humidity in your home (the home environment is especially hot and humid). The house on the cover integrates a set of photovoltaic solar collectors that provide 4 kw / peak, enough to power this system, and meet their energy needs few (as few appliances, and are highly energy efficient).

3. Sustainable Analysis

1. Resource optimization

1.1. Natural Resources. They take full advantage of resources such as the sun (for home heating and power generation), the breeze, the land (to cool the housing), rainwater (for garden irrigation and flushing toilets), .... .

1.2. Resources manufactured. The materials used are maximized, avoiding maximum possible waste through proper design and effective management (concrete, bricks, ceramic tile, carpentry, painting, ...). On the other hand, the correct design of housing based load-bearing walls, allowing resources to be built with little auxiliary (such as scaffolding, cranes, etc ...).

1.3. Resources recovered, reused and recycled.
The vast majority of housing materials may be recoverable (flooring, woodwork, glass, wood beams, girders, deck, walkways, cupboards, wood coatings, sunscreens, health, ...).
On the other hand, has promoted the use of recycled and recyclable materials, such as polypropylene water pipes, drain pipes polyethylene, chipboard OSB for interior doors, plywood boards and pitched roof coatings, recycled glass kitchen countertops and windows, etc ...

2. Reduction of energy consumption

2.1. Construction.
The house is built with minimal energy consumption. The materials used were manufactured with a minimal amount of energy. Moreover, housing has been built with little auxiliary resources, and with very little labor.

2.2. Use
Because bioclimatic characteristics, housing has a very low energy consumption standard. The house is heated by greenhouse only. The hot water is generated by means of two thermal solar collectors. The house is cooled by bioclimatic structure, and by means of a mechanical system powered by photovoltaic solar collectors integrated into its architecture.

2.3. Dismantling
The vast majority of the materials used can be recovered easily (once the life of the building) to be reused in the construction of another building (flooring, woodwork, glass, wood beams, girders, deck, walkways, cabinets, wood coatings, sunscreens, health, ...). On the other hand, housing is designed to have a high durability and lifecycle of hundreds of years, and that all components of the home are easily repairable. Thus, there is no question of dismantling, but continued maintenance of very low energy consumption.

3. Using alternative energy sources
The energy used is of two types: solar thermal (two solar collectors for the ACS, and soda water evaporation to air) and photovoltaic, and geothermal (air refresh system leveraging existing low temperatures at 2 meters underground in the galleries below the suspended floor of the house).

4. Reduction of waste and emissions
The property does not generate any emissions, and does not generate any waste, except organic. Part of these domestic waste are used again conveniently treating (gray water for watering the garden). Furthermore, during construction of the house barely waste are generated, and many of them have been reused.

5. Improving health and wellbeing
All materials used are environmentally friendly and healthy and do not have any programs that might affect human health. Similarly, the house is ventilated naturally, and maximizing natural lighting (artificial lighting can not utilizase daylight while there) which creates a healthy environment and provides the best possible quality of life for building occupants .

6. Reduced price of the building and its maintenance
The property has been designed rationally, eliminating superfluous items, unnecessary or gratuitous, allowing construction to a conventional price, despite incorporating ecological equipment. Similarly, housing is very easy to maintain: regular cleaning, and wood treatment biennial vegetable oil based.

4. Bioclimatic Features

1.1. Heat generation systems
The housing is heated by itself in two ways: 1. Avoiding cool: because of its high thermal insulation and featuring large glass surfaces just south and east, and none north. 2. because of its special and careful bioclimatic design. Greenhouse is heated, direct sunlight, and remains hot for a long time, due to its high thermal inertia.

1.2. Fresh Generation Systems
The housing cools itself in four ways: 1. Avoiding heat: arranging the glass surfaces only south and east, just west of sunscreens providing for direct and indirect solar radiation (a type of protection different for each of the holes with different orientation), and having an insulation suitable. 2. Cooling by a cooling air through a wind sensor, and a geothermal system of underground galleries. Furthermore, due to the high thermal inertia of housing, fresh accumulated overnight, held for almost the entire next day. 3. Evacuating hot air outside the housing, by means of a solar chimney and by natural convection and 4. A mechanical cooling system by evaporation of water.

3. Storage systems (heat or cool)
Heat during the day in winter (greenhouse and sunlight) accumulates in the floors and interior load-bearing walls of high thermal inertia. Thus the housing remains warm overnight, hardly energy consumption.
The fresh generated overnight in summer (for natural ventilation due to lower temperatures outside) accumulates in the floors and interior load-bearing walls of high thermal inertia. Thus housing remains cool throughout the day without any energy consumption.

4. Transfer systems (heat or cool).
The heat generated by greenhouse gases and natural radiation is distributed throughout the home, through the central courtyard, which dumped all stays.
Fresh air generated in the underground galleries housing is shared by using a set of grids spread over the floor of the house. On the other hand, fresh air ascends through the central courtyard and walking all stays through grids of Interior doors. The fresh air vents of the mechanical system, the outputs match bioclimatic architectural system.

5. Natural ventilation
The ventilation of the building is done continuously and naturally, through the very walls surround, allowing adequate ventilation without energy loss. This type of ventilation is possible since all materials are breathable (ceramic, cement-lime mortar, silicate paint), but all have a completely hydrophobic behavior.

5. Eco-friendly materials

1. Foundations and structure.
Wall two sheets. The inner blade wall is perforated brick load of 25 cm. thick (with high thermal inertia). The wrapper is hollow brick of 7 cm. Inside there is a double sheet of hemp insulation layer of 5 cm. and a ventilated air space of 3 cm. (In some parts of the wrapper facade is made of wooden slats tongued sweden heat-treated pine, arranged by battens, including a hemp insulation layer of 5 cm, and a ventilated air space of 2 cm .) semiviguetas Forged prestressed, and concrete slabs.

2. Exterior finishes
Paint the silicates. Ipe wood treated with vegetable oils.

3. Interior finishes
Paintings vegetables. Floors porcelain tile. Double doors plywood board, beech plywood, and treated with vegetable oils.

4. Cover
Pitched roof that enhances the natural convection and generates a "chimney" effect for removal of indoor air in summer. The sloping roof is made of a board "sandwich" consisting of three sheets: a board Viroc (wood chips with cement) of 13 mm. thick, a layer of black cork (cork bark from forest burning) of 100 mm. thick, and a birch plywood board of 13 mm. thick. This board "sandwich" is protected by a tarpaulin and a zinc coating.

5. Others
Polypropylene water pipes. Drains from polythene. Energy-efficient appliances. Iroko wood joinery treated with vegetable oils. Cotton canvas awnings. Sunscreens Ipe hardwood, treated with vegetable oils. All woods used have a certificate of origin with selective logging and ecological treatment (FSC).

6. Outstanding Innovations

- Design of the sensor system of wind and geothermal air refreshment, through underground tunnels, utilizing the space below the suspended floor.

- Mechanical system powered by photovoltaic captors soda.

- System integration bioclimatic architectural refresh, with the mechanical system.
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