Tsing Hua University
Educational - University Building
Credit: Bio-architecture Formosana
This project has been undertaken during employment at Bio-architecture Formosana (2011).
Solar Chimney Performance Optimization
The aim of this study was to evaluate techniques that would provide cooling by natural ventilation. Strategies were assessed and chosen to incorporate a reversible system: a solar/thermal chimney to provide the building with ventilation, cooling and heating when needed. We used CFD simulations to develop the chimney's concept, adjust its design features and prove its effectiveness and performance.
Client: Tsing Hua University
Architect: Bio-architecture Formosana
Gross Floor Area: 19,885 m² on 9 floors
Website: Bio-architecture Formosana
Conceptual studies and technical specifications
Green design strategy development based on weather data and thermodynamic models
Solar chimney's feasibility and efficiency analysis
Computational Fluid Dynamics modeling and analysis for natural ventilation potential
Prior analysis was undertaken to understand how airflow is impacted by the architectural design. This analysis defined our benchmark for natural ventilation potential and helped us develop passive design techniques to enhance wind induced ventilation.
Thermal chimneys also called solar chimneys are built to ventilate the hot and stale air out of a space by providing new fresh air from lower vents. The hot air exists from higher vents, usually located at the top of the chimney.
In summer, hot air is extracted from the top chimney vents, keeping the indoor spaces cool and ventilated.
In winter, the top chimney vents can be closed to trap hot air which will then be distributed in the indoor spaces of the building to comply with the heating needs.
Solar Chimney Concept; summer and winter scenario
CFD modeling and simulations were used to predict and evaluate airflow patterns. Several simulations were conducted during the summer and winter scenario, to optimize the design's effectiveness for natural ventilation implementation. These simulations included inlet size and location, window dimension and location, wind catchers an specific solar chimney design options such as chimney location, height, inclination, vents and materials.
CFD Simulation results: air velocity profie through operable windows
CFD Simulation results: air velocity profie through thermal chimney