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Butterfly House
Thailand / Ubonratchathani16.00,105.00
Client Name: University of Ubonratchathani
Project website:
Project Description
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. 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 Details
Single House
New building project
2
150 m²
120 m²
80 m²
OTTV/RTTV
USD 43,000
USD 290
2005
2006
Project Team
Chulalongkorn University
Stonehengh Co., Ltd.
Dr.Atch Sreshthaputra
www.africvs.com
Stonehengh Co., Ltd.
Dr.Atch Sreshthaputra
Dr.Atch Sreshthaputra
Dr.Atch Sreshthaputra
Climate Analysis
Ubonratchathani has a Tropical Savanna Climate. The climate is arid with little rain in winter, relatively high temperatures in summer, cool in winter, and rain from May to October, about 70-90 days. The average annual temperature is 28-29 degrees Celsius. Maximum temperatures average 33-34 degrees Celsius and minimum temperature averages 23-24 degrees Celsius. April is the hottest month of the year, while winters are cool in January.
Design Approach
Located on a large open space area with prevailing wind most from the south
Stack ventilation. Natural Ventilation, Radiative Cooling. Solar Shading.
Document
Special Feature
Daylight from north façade.
Low-flow, low-flush bathroom fixtures
Stack Ventilation and Venturi Effect
Local materials within 500 kM
Large trees on west and south side
Building Material
Reinforced Concrete
Autoclaved Aerated Lightweight concrete block with 1" Polyurethane Foam and Gymsum Board
Glazing percentage of walls - 0.2 U-value of windows - 5.8 W/m2.K Solar Heat Gain Coefficient (SHGC) of windows - 0.68 Visual Transmittance of windows - 0.72
Laminate
Double roof with ventilated cavity, Metal sheet and 6" Fiberglass Insulation
Energy systems
T-5 Fluorescent lamps
N/A
Electric ceiling fan in living room
Split-type air-conditioners
High-efficient air-conditioners (EER > 12)
None
Lessons Learned
Natural ventilation works effectively all year round especially at night. Daylight is not really necessary as the occupants are not inside during the daytime. Stack ventilation is difficult to control and predict at times.