Exemplo de Casa passiva na Espanha, 84% de economia de energia em comparação ao padrão CTE.

Descrição:
Uma residência unifamiliar isolada com critérios de PASSIVHAUS. Uma economia de energia calculada em relação ao CTE de 84%. Um esforço conjunto, onde os conselhos do construtor e do arquiteto foram escutados para permitir a realização de uma Casa Passiva, que garantisse uma eficiência energética e conforto térmico muito altos.
A principal condição de partida foi a geometria, que estava a favor, pois sua orientação Norte-Sul facilitava a incorporação de critérios passivos que foram o fator dominante durante o processo de projeto e construção. Trata-se de uma residência construída por um autoconstrutor com certos ideais de respeito à Natureza, que chegou à construção desta residência inicialmente por uma motivação estética e do gosto pelo sistema construtivo principal: a madeira
 
 

 O isolamento das fachadas eliminou a necessidade de refrigeração
Sem dúvida, diferente da grande maioria dos autoconstrutores, esta família escutou inicialmente e acabou por confiar nas explicações da equipe de arquitetos e do construtor, desde seus conceitos de economia energética e respeito ao meio ambiente, e chegaram a um entendimento pleno do sistema construtivo empregado, aceitando um leve sobrecusto inicial na construção, contrabalanceado pela economia energética futura.
Trata-se de um edifício cujo desenho nasce de vários fatores: a sua geometria, estreita e alargada como fator de forma determinante, e seu desenho volumétrico e orientação com o intuito de aproveitar a insolação de forma natural.
Por sorte, apesar de ser estreita, a casa conta com esta orientação Norte-Sul, de maneira que no clima de Berrikano, de invernos severos e verões suaves, pode-se aproveitar a fachada Sul para a abertura de grandes espaços que permitam a entrada de energia solar “gratuita” durante os meses frios.
Este desenho podia ser convertido em um problema nos meses de verão, para proteger o interior da residência de um aquecimento excessivo. Por isso moveram-se os volumes da planta do primeiro andar e alongaram a ala Sul, de forma que as sombras autogeradas promovem uma proteção natural em relação aos raios solares mais verticais.
Os estudos de economia unidos ao cuidado do projeto PASSIVHAUS das paredes e encontros levaram a dados demolidores:
-Economia energética de 84 % frente ao padrão CTE
-Não é necessária a instalação de um sistema de calefação além de uma caldeira de pellets localizada perto do centro geométrico da casa
-Não é necessária a instalação de um sistema de refrigeração, sendo suficiente o sistema de ventilação mecânica, unido à ventilação natural do edifício nos dias mais quentes do ano.






 

 Estratégias passivas mostraram resultado na conta de energia
Se tivessem que fazer outra vez:
Repetiriam: Arquitetura solar, orientação, proteção passiva do edifício, edifício compacto, sistema construtivo de madeira
Não Repetiriam: Ausência de um controle solar efetivo durante o verão, persianas ou toldos mais eficazes.
Opinião dos usuários da residência:
O cliente nos transmite sua satisfação pelo comportamento geral da residência durante o inverno: gastaram €150 em pellets ao longo da estação, sendo que o gasto médio na região na mesma temporada fica entre €2000 e €3000. O comportamento durante os dias mais quentes não é tão confortável quanto se desejaria, mas com a ventilação natural consegue-se facilmente a temperatura do edifício nas horas noturnas.




Simulações de ganho de calor

Resumo:
Tipo de Projeto: Nova construção
Tipo de Edifício: casa isolada
Ano da Construção: 2012
Zona Climática: Continental
Superfície Útil: 226 m²
Custo da Construção: € 253.109
Número de Unidades Funcionais: 1 residência
Custo/m²: 1.120 €/m²
Buruaga Bidea, 01138 Berrikano, Alava
Espanha
Energia:
Consumo de energia:
Custo da eficiência energética do edifício: 0kWh PE/€
Energia primária necessária: 15 kWh PE/m²/ano
Energia primária necessária de um edifício padrão: 97kWh PE/m²/ano
Método de Cálculo: Real Decreto Espanhol: 47/2007
Mais infirmações: durante o inverno, o gasto comprovado em pellets dos clientes foi de €150
Comportamento da Envoltória:
Valor do U: 0,13 W/m².K
Mais informações: valores da envoltória térmica:
Acabamento da fachada: U=0,126 w/(m2K)
Fachada ventilada de madeira: U=0,150 W/(m2K)
Telhado: U=0,116 W/(m2K)
Soleira: U=0,169 W/(m2K)
Carpintaria: Uf 0,91 W/m2K
A fachada predominante constitui-se de:
Acabamento em reboco
Poliestireno: 50mm
Fibra mineral: 240 mm
Barreira de vapor
Painéis Osb
Fibra mineral: 40mm
PYL
n50 (I4) m³/H.m²n50 (Vol/H) Q4
Valor da permeabilidade ao ar : 1,32
Sistemas:
Sistema de calefação: Outros, sem sistema de calefação
Sistema de água quente: Caldeira elétrica individual
Sistema de refrigeração: sem sistema de refrigeração
Sistema de ventilação: Fluxo de duplo trocador de calor
Sistemas renováveis: Caldeira de biomassa
Ficha Técnica
Construtor principal

• · ZBB

Autor do projeto

• · Gorka Elorza
• · GE arquitectura - Neum-Ecohabita

Consultoria térmica

• ·TBZ-ENERGIEHAUS - Micheel Wassouf  

fonte:
http://www.engenhariaearquitetura.com.br/noticias/935/Um-exemplo-de-Casa-passiva-na-Espanha.aspx

Soleta Zero Energy One House: perfectly in tune

Belo exemplar de casa sustentável. Utilizou materiais naturais e da região, paredes com bom isolamento térmico, ventilação natural e cruzada, iluminação natural, preocupou-se em sombrear as aberturas e uso de madeira laminada colada para estrutura. Outro ponto muito importante para a sustentabilidade de uma edificação é o seu tamanho que neste os 48m² foram muito bem aproveitados, digo isso pois uma das condições para a redução do consumo energético em uma edificação é o projeto ser enxuto, sem exageros. Imaginem o gasto energético para condicionar térmicamente uma pequena casa ou um galpão industrial...sustentabilidade não é luxo, é uma condição ecologicamente correta.

An innovative Eco home prototype is waiting to be discovered in Bucharest, Romania. Soleta Zero Energy One is a multi-use building for its versatile design: a small, single-story volume with a total floor area of 48sqm can be used as a weekend cabin, an office or even as a permanent home. The form of Soleta resembles the archaic shape of nomad tents – a modern manifest of persistent values in architecture.

A covered terrace leads to the front door – a glazed facade – that offers a total glimpse of the interior space. Social areas share the same open space while the bathroom is located at the rear facade. A bedroom is placed just below the pitched roof accessed by a staircase made out of bookshelves.

 However, this building is even more precious due to its ecological concern: it’s constructed with natural materials sourced locally, including glue laminated wood for the structure and wood shingles for the roof. Instead of the usual solid perimeter walls, insulated glass panels were used to create a clear relationship between nature and interior areas, while providing natural light and ventilation.

 A heat recovery system assures that no losses are allowed in this Eco-friendly home during the wintertime. In fact, renewable energy sources assume the main fuel for this conceptual building: 45 percent energy efficiency is obtained with smart energy, climate and ventilation monitoring and managing system that can be controlled remotely with a mobile phone. As you can imagine, all seems to be perfectly in tune for a discrete relation between architecture and nature in this green home…

fonte:
http://www.busyboo.com/2013/08/15/small-eco-home-soleta/

Casa para três gerações by Uptic Studios

The goal of the Coeur D’Alene Cabin was to create a modern cabin for a couple, their kids, and their grandkids. Located on Coeur D’Alene Lake in North Idaho, we considered the combined occupancy of three generations, providing separate spaces for privacy in addition to common rooms that bring everyone together comfortably.
One of the driving forces behind the design was the site’s existing conditions. The property is steep and narrow with a natural spring that runs beneath the hillside. We realized you could shift the dirt anywhere and water would emerge. This resulted in the dual form approach, bridging the gap where the underground stream flows naturally.
The Cabin is centered on the notion of a large close-knit family, and each member was considered in the design. We strove to find commonalities between family members to develop an aesthetic that addressed everyone’s needs and visions.
The view from the site was an important aspect to the client and integral to the design. To maximize outdoor space and connection to the landscape, columns were absent on the deck. A steel beam system supports the cantilevered roof and allows the windows to extend to the ceiling, blurring the delineations between indoor and outdoor spaces. Large sliding doors and indoor/outdoor kitchen counters create a unique relationship between the deck and indoor common areas.

 
 

 

 





 

 

 

 

 fonte:
http://www.contemporist.com/2013/06/22/coeur-dalene-residence-by-uptic-studios/co_220613_12/

Urban townhouse: living in the city that never sleeps

A unique townhouse is quietly living in the skyscraper city that never sleeps…In New York City there’s a five-story building that redefines the typology of the common urban townhouse on a representative narrow Manhattan plot. Stuck between two ancient brick houses, Urban Townhouse demonstrates how to achieve the most unique experience of living within a small area.

 Privacy stood as a major goal to be attained so a particular set of principles were carefully developed in order to obtain the most balanced solution: open loft-like living spaces are brilliantly organized behind a four-story vertical library. The program follows a clear sequence of spaces defined by the stair and elevator nucleus cleverly pushed against the street facade, instead of being positioned along one of the party walls.

The social areas of the townhouse – living room, dining room, and kitchen – are bonded by a light-filled mezzanine which points to the backyard. A private office and also sitting rooms to bedrooms extend off the stairs offering a dynamic journey through this magnificent example of contemporary architecture.
However, there’s an unusual architectonic answer to the basic need of privacy: the front facade is composed by an aluminum rain screen perforated with brick-shaped openings relating to the solid bricks of its neighbors. An original approach was conceived to establish a fresh relation between past and present values where an ancient pattern gives birth to a new type of constructive language.

The rear facade is developed as a total counterpoint presenting a full-height glass wall that bathes the interior space with daylight. At night, the lantern-like light of the interior illuminates the garden in a delicate poetic gesture…


















 


 



Architects: GluckPlus Architects
Photography: Raimund Koch

fonte: http://www.busyboo.com/2013/05/23/modern-townhouse-nyc/

Peaceful Rural Home Overlooking Panoramic Mountain

The picturesque surroundings of Roprachtice, Czech Republic hit you straight to the heart! For those of you who enjoy some time on their own, away from all the negative city vibe, we highly recommend a breezy location where time stops for a while, reminding you to stop as well and stare to the blue sky. Roprachtice House is a project developed by PRODESI, in the middle of a healthy and relaxing environment. The house is guarded on its south by a baroque rectory, the church and the former school and opening up towards the central side of the village.
The house features strong rural accents, wooden beams and an attic that allows the most breathtaking and bohemian views over the Giant Mountains. The attic is designed as an open space, creating an airy atmosphere. Enchanting despite its simplicity, the wooden dwelling is a fairytale place, the shelter that perfect for exploring a different type lifestyle. There is something though, less traditional embedded in the house’s structure: a rectangular wide window, framed in wood, overlooking the village.







 

fonte: 
http://freshome.com/2013/05/09/peaceful-rural-home-overlooking-panoramic-mountain-vistas/

Optical GLass House by Hiroshi Nakamura & NAP

Hiroshi Nakamura & NAP have designed the Optical Glass House in Hiroshima, Japan.

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Project description

This house is sited among tall buildings in downtown Hiroshima, overlooking a street with many passing cars and trams. To obtain privacy and tranquility in these surroundings, we placed a garden and optical glass façade on the street side of the house. The garden is visible from all rooms, and the serene soundless scenery of the passing cars and trams imparts richness to life in the house. Sunlight from the east, refracting through the glass, creates beautiful light patterns. Rain striking the water-basin skylight manifests water patterns on the entrance floor. Filtered light through the garden trees flickers on the living room floor, and a super lightweight curtain of sputter-coated metal dances in the wind. Although located downtown in a city, the house enables residents to enjoy the changing light and city moods, as the day passes, and live in awareness of the changing seasons.

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Optical Glass Façade
A façade of some 6,000 pure-glass blocks (50mm x 235mm x 50mm) was employed. The pure-glass blocks, with their large mass-per-unit area, effectively shut out sound and enable the creation of an open, clearly articulated garden that admits the city scenery. To realize such a façade, glass casting was employed to produce glass of extremely high transparency from borosilicate, the raw material for optical glass. The casting process was exceedingly difficult, for it required both slow cooling to remove residual stress from within the glass, and high dimensional accuracy. Even then, however, the glass retained micro-level surface asperities, but we actively welcomed this effect, for it would produce unexpected optical illusions in the interior space.

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Waterfall
So large was the 8.6m x 8.6m façade, it could not stand independently if constructed by laying rows of glass blocks a mere 50mm deep. We therefore punctured the glass blocks with holes and strung them on 75 stainless steel bolts suspended from the beam above the façade. Such a structure would be vulnerable to lateral stress, however, so along with the glass blocks, we also strung on stainless steel flat bars (40mm x 4mm) at 10 centimeter intervals. The flat bar is seated within the 50mm-thick glass block to render it invisible, and thus a uniform 6mm sealing joint between the glass blocks was achieved. The result?—a transparent façade when seen from either the garden or the street. The façade appears like a waterfall flowing downward, scattering light and filling the air with freshness.

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Captions
The glass block façade weighs around 13 tons. The supporting beam, if constructed of concrete, would therefore be of massive size. Employing steel frame reinforced concrete, we pre-tensioned the steel beam and gave it an upward camber. Then, after giving it the load of the façade, we cast concrete around the beam and, in this way, minimized its size.

 

fonte:

http://www.contemporist.com/2013/01/10/optical-glass-house-by-hiroshi-nakamura-nap/