Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/223001
Title: PERFORMANCE EVALUATION OF SOLAR CHIMNEY IN ZERO ENERGY BUILDING AT BUILDING AND CONSTRUCTION AUTHORITY (BCA) ACADEMY
Authors: NG EE LIN
Keywords: Building
Project and Facilities Management
Wong Nyuk Hien
2011/2012 PFM
BCA Academy
Solar chimney
Zero Energy Building
Issue Date: 4-Jan-2012
Citation: NG EE LIN (2012-01-04). PERFORMANCE EVALUATION OF SOLAR CHIMNEY IN ZERO ENERGY BUILDING AT BUILDING AND CONSTRUCTION AUTHORITY (BCA) ACADEMY. ScholarBank@NUS Repository.
Abstract: Due to the hot and humid nature of Singapore, mechanical ventilation such as fan and air conditioners are often required to provide the necessary thermal comfort and ventilation. This often takes up 40-50% of the building energy usage (Boey, 2011). Solar chimney had been employed in other countries in various building types for reducing energy usage due to ventilation. However, not many were employed in Singapore. Being the first large scale solar chimney in Singapore school at Zero-Energy Building (ZEB), it will be interesting to investigate on the performance of solar chimney in enhancing natural ventilation. Additionally, various configurations to the building may affect the performance of solar chimney. As such, this report focuses on the performance of solar chimney under various configurations. Full-scale experiment was conducted in ZEB hall with aims to understand the effectiveness of solar chimney, the effects of each experiment configuration and to identify which configuration will result in the best performance of solar chimney. From result analysis, with or without opening of fenestrations do not affect much of the air induced by solar chimney as the perforated wall above fenestrations allow air to be drawn in despite without opening of fenestrations. As such, the interior air speed for both were relatively akin. Conversely, sealed vertical interior ducts allow about 1.4 times higher interior air speed to be induced than unsealed vertical interior ducts as air was directly drawn to the chimney without escaping from the sides of the ducts. It was also noted that inlets to ventilation shafts play a significant role in inducing air movement in the hall. Without all inlets to ventilation shafts from level one to three in operation, air can only exit from the chimney through the vertical interior ducts. Hence, with lesser volume of air removed, this leads to lesser air drawn into the interior. As a result, minimal air movement are induced in the hall. Lastly, recommendations are included in the report for future research.
URI: https://scholarbank.nus.edu.sg/handle/10635/223001
Appears in Collections:Bachelor's Theses

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