Butterfly House

New Construction

  • Building Type : Isolated or semi-detached house
  • Construction Year : 2005
  • Delivery year : 2006
  • Address 1 - street : 34190 UBON RATCHATHANI, Thailand
  • Climate zone : [Aw] Tropical Wet & Dry with dry winter.

  • Net Floor Area : 120 m2
  • Construction/refurbishment cost : 38 000 €
  • Cost/m2 : 316.67 €/m2

Proposed by :

  • Primary energy need :
    82.5 kWhpe/m2.year
    (Calculation method : Other )
Energy consumption
Economical buildingBuilding
< 50A
A
51 à 90B
B
91 à 150C
C
151 à 230D
D
231 à 330E
E
331 à 450F
F
> 450G
G
Energy-intensive building
This is an energy efficient house that was built by the University of Ubonratchathani in 2005 as part of a research project funded by the Ministry of Energy of Thailand. 2-storey house with 2 bedrooms on the second floor and living space downstairs is made of concrete structure. Upper floor plate is bigger to act as shading for lower one. The distinct feature is a chimney aligned at center of the house to ventilate during the daytime. The roofs are break into 2 pieces and tilted like butterfly wings shape into the chimney to create the pressure different for venturi effect under the roof and gain benefit from night radiation. Moreover, all main functions are categorized as service zone and living zone, oriented and break them by the chimney.

Data reliability

Self-declared

Stakeholders

Contracting method

Public Private Partnership

Owner approach of sustainability

The building is constructed as a prototype of modern residential building. Passive building techniques are applied to this project such as stack ventilation, radiative cooling, venturi effect, self-shading and building orientation. The building is equipped with thermocouple to study on an effect of these design technique.

Architectural description

2-storey house with 2 bedrooms on the second floor and living space downstairs is made of concrete structure. Upper floor plate is bigger to act as shading for lower one. The distinct feature is a chimney aligned at center of the house to ventilate during the daytime. The roofs are break into 2 pieces and tilted like butterfly wings shape into the chimney to create the pressure different for venturi effect under the roof and gain benefit from night radiation. Moreover, all main functions are categorized as service zone and living zone, oriented and break them by the chimney.

Energy consumption

  • 82,50 kWhpe/m2.year
  • 86,58 kWhpe/m2.year
  • Other

  • 75,00 kWhfe/m2.year
  • Lighting 2%
    Air condition 86%
    Ceiling fan 1%
    Equipment 9%
    Misc 2%

Envelope performance

  • 0,43 W.m-2.K-1
  • Typical material for wall is composed of lightweight concrete block with cellulose fiber cement outside and 1" polyurethane foam in between to block external heat gain and moisture. For fenestration area, ocean green float glass is utilized due to the low shading coefficient property (SC=0.59) while the visible ray transmittance is high (VT = 0.72) to maximize the benefit from daylight. Roof has double layers to create venturi effect for attic ventilation.

Systems

    • No heating system
    • No domestic hot water system
    • Fan coil
    • Natural ventilation
    • Nocturnal ventilation
    • No renewable energy systems

    High-efficient air-conditioners (EER > 12)

Product

    Chimney

    Africvs Co.,Ltd. | Chimney is a part of architectural design.

    [email protected]

    Structural work / Passive system

    Vertical cavity for ventilation, most effectively in the daytime

    Temperature inside the house is reduced.

Construction and exploitation costs

  • 3 850
  • 38 500

Urban environment

Located on a large open space area with prevailing wind most from the south

Land plot area

224,00 m2

Built-up area

40,00 %

Green space

80,00

Parking spaces

1 parking undercover

Building Environmental Quality

  • comfort (visual, olfactive, thermal)
  • energy efficiency

Reasons for participating in the competition(s)

​The house is a product stemmed from a housing design competition that had a condition to build a real house in order to collect data on thermal comfort. Passive design using radiation cooling, natural ventilation, solar shading, and roof insulation was used effectively.​

Building candidate in the category

Energy & Hot Climates

Energy & Hot Climates

Green Building Solutions Awards 2016


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