Publication: Development of night sky nocturnal radiative passive cooling
Loading...
Date
2024-07-11
Authors
Nur Izzati binti Yusoff
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
A sustainable and energy-efficient radiative heat transfer concept to cool the buildings using the night sky is called nocturnal radiative passive cooling. The colder night sky act as a heat sink as the materials used in the system radiate its heat in the infrared spectrum. Compared to the active cooling where electricity is being used to cool the material, passive cooling operates without electricity resulting in reduced energy consumption and greenhouse gas emissions for Malaysian homes. Conventional air-conditioning unit is a popular choice amongst Malaysians to cool down their homes quickly. However numerous studies have shown the harmful effect of conventional air-conditioning unit to the environment due to its energy consumption and greenhouse gases emissions. A lunar panel which utilizes the concept of nocturnal night sky radiative passive cooling is developed in this study to provide an alternative cooling system for Malaysian homes. Water acts as the medium to radiate the heat and cool down a room. Previous study has shown that a 14.6m2 lunar panel would be able to reduce the heat of the water by 2◦C. This study aims to develop and increased size of the lunar panel to increase its efficiency. The cost of the nocturnal night sky radiative passive cooling would also be calculated to estimate the Return of Investment (ROI) when they are installed in a Malaysian home. A low cost and high ROI cooling system would be able to replace the conventional air-conditioning system to create a greener environment for Malaysia.