Sustainable housing in Vietnam: Climate responsive design strategies to optimize thermal comfort

Type Thesis or Dissertation - Doctor in Architecture and Urban planning
Title Sustainable housing in Vietnam: Climate responsive design strategies to optimize thermal comfort
Publication (Day/Month/Year) 2013
URL analysis methods.pdf
Housing issue in Vietnam is still a big concern as in 2008, 72.2% of the existing
housing was semi-permanent or temporary and 89.2% of the poor did not have a permanent
shelter. As a response to sustainability, the global aim of this thesis is to develop design
strategies toward comfortable, energy-efficient housing with acceptable building cost.
Occupants’ thermal comfort is the key assessment criterion throughout the research.
First of all, the thesis develops a thermal comfort model for Vietnamese people
living in naturally ventilated buildings through the data from field surveys around SouthEast
Asia. This comfort model is then validated by survey data in Vietnam in 2012.
A new simple climate analysis tool is developed, used to analyze the climate of 3
regions in question and to draw preliminary design guidelines. A comprehensive study on
climate responsive design strategies of vernacular housing in Vietnam is also carried out.
The results to some extend reveal the remaining values of vernacular architecture and
provide valuable lessons for modern applications.
Three most common housing prototypes in Vietnam are selected. Afterward a
comprehensive framework is implemented to derive thermal performances of 3 typical
housing types. Various techniques (in situ monitoring, building thermal simulation, CFD
and airflow network model, numerical model calibration, parametric simulation method) are
employed to improve the thermal performances and natural ventilation of these houses.
The sensitivity of building performance to the design variables is outlined by Monte
Carlo-based sensitivity analysis. The thermal performances of the reference cases are
optimized using the simulation-based optimization method and the most influential design
variables. Optimization results show the best combinations of design strategies for each
climatic region. The performances of the optimal solutions are compared with the
references, providing an insight of the efficiency of this approach in building design.
Finally, the different objectives yielded in this thesis are summarized. The possible
future extensions of this research are outlined.

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