Abstract
This paper presents a novel cool roof technology system that promotes both passive and active cooling methods in reducing the attic temperature of the building. The project aimed to evaluate the effect of various roof model designs on the heating load to establish the capacity of a cooling roof system by maintaining the thermal comfort level for occupants in the buildings. There are four main components in constructing the cool roof models: 1) metal deck roof, 2) lightweight foam concrete roof, 3) moving-air-cavity (MAC) ventilation, and 4) solar-powered fan. Four small-scale cool roof models were built to evaluate the performance of each cool roof design. The performances of the roof surface and attic temperatures of each designed cool roof models were compared with the conventional metal deck roof. The roof models were conducted indoors by using halogen spotlights. The result of the Roof Design IV with the integration of lightweight foam concrete, MAC, and solar-powered fans has effectively reduced the attic temperature by 6.0°C compared with the normal roof model (Roof Design I). As a result, this integrated cool roof design comprises the ability to enhance the comfortability of occupants toward long-term sustainable development with the utilization of renewable energy to protect the natural environment.
Highlights
Many recent studies have focused on green building with interest in cool roof technology
The designed cool roof roofing technology system makes use of the solar-powered fan, moving-air-cavity (MAC), and lightweight foam concrete roofing to reduce the attic temperature toward an eco-friendly and sustainable roof design, which has not been studied by other researchers
The main objective is to design an integration cool roof system to reduce the temperature in the attic by using effective roofing materials, MAC ventilation, and sustainable solar
Summary
Many recent studies have focused on green building with interest in cool roof technology. The hot climate results in a high indoor temperature when the solar radiation hits the roof and wall of the buildings, which increases the demand for air conditioners. Most of the roofs in industrial buildings such as factories and warehouses are built using metal deck roofing that leads to rising of the roof, attic, and indoor temperatures when exposed to full sunlight in the afternoon. In this project, the designed cool roof roofing. Technology system makes use of the solar-powered fan, moving-air-cavity (MAC), and lightweight foam concrete roofing to reduce the attic temperature toward an eco-friendly and sustainable roof design, which has not been studied by other researchers. The performance of the four designs 1) metal deck roof coated with normal paint without MAC (Design I), 2) lightweight foam concrete without MAC (Design II), 3) combination of lightweight foam concrete with MAC (Design III), and 4) combination of lightweight foam concrete with MAC and solar-powered fan (Design IV) were studied and compared
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