Browsing by Author "Dareeju, BSSS"

Now showing 1 - 4 of 4

item: Conference-Abstract
Indoor thermal performance of green roof in a tropical climate
(2016-10-12) Dareeju, BSSS; Meegahage, JN; Halwatura, RU
The concept of Sustainable building development has been promoted to overcome the issues occurring due to the energy crisis, environment impacts and rapid urbanization. Minimization of energy usage for achieving a comfortable indoor thermal environment in a building is one of the key elements of sustainable development. However, it is very important to assess the performance of buildings with sustainable elements in tropical countries, where warm humid climatic conditions prevail. As a result, green roof is proposed as a sustainable element for buildings in tropical climatic conditions and its indoor thermal performance was determined experimentally using small scale models. Using those experimental results and literature, large scale buildings were modelled to simulate the indoor thermal performance of sloping traditional roofs, reinforced flat concrete slabs and green roofs. The results have proved that green roofs provide acceptable indoor thermal performance with respect to the other traditional roofs. It was found that the green roofs act as resistive and capacitive insulators, which result in more indoor thermal comfort to the occupants while re-establishing the relationship between human and environment, which have been destroyed due to the rapid urbanization. In addition to the indoor thermal performance green roofs also provide cyclone resistance, aesthetics and higher robustness to the building.
item: Conference-Extended-Abstract
Indoor thermal performance of turf roof slabs
(2010) Halvvatura, RU; Dareeju, BSSS; Deshappriya, KA; Meegahage, JN
In the past few decades the scientists had focus their attention more on sustainable development because of the energy crisis, while has reached to an alarming level. Energy requirement of urbanized arrears is rising at an increasing rate. Since people are more concern about thermal comfort, it can further accelerated with expected global climatic changes. The impact of the environment due to urbanization lead us way towards sustainable development. The traditional construction methods are replacing with new innovations and trends shows that the traditional sloping roof are replaced by flat slabs, since it can create another usable space at the roof level and also a green environment at the roof level. Buildings coupled with greenery will be an ideal solution for many environmental and social issues face by the occupants mainly in urban areas. The life cycle performance can be used to access its long term performance of the grass roof slabs and can be used to compare the new system with existing arrangements. It was shown that green roof slabs could have a desirable behavior with respect to life cycle performance in addition to providing other benefits such as cyclone resistance, aesthetics, use as an outdoor living space, and higher robustness to the building.
item: Conference-Full-text
Influence of grass cover on flat reinforced concrete slabs in a tropical climate
(2013-11-27) Dareeju, BSSS; Meegahage, JN; Halwatura, RU
Reinforced concrete slab is a better alternative to regain the land due to the buildings because available land is insufficient for usage with respect to the rate of urbanization. However, the reinforced concrete roof slabs do not perform in acceptable level in tropical countries with warm humid climate condition and tend to act as heated bodies which emit long wave radiation to the occupants. As a solution, a green roof is proposed and its thermal performance was determined experimentally using small scale models. Using experimental results, large scale building models were developed to simulate the indoor thermal performance of green roofs and it is shown that the green roof provide satisfactory indoor thermal performance while providing many other benefits such as enhancing aesthetic and regaining lost land for the building.
item: Article-Abstract
Performance of green roof against the global warming
(2016-10-13) Dareeju, BSSS; Meegahage, JN; Halwatura, RU
In the past few decades, scientists are seeking to overcome issues; occurring due to global warming, which has reached into an alarming level. Global warming has led to many environmental issues including rising sea level and increasing indoor thermal discomfort. These sudden changes badly affect the occupants; living in the tropical climate condition which leads to enhance the heat discomfort in the buildings. As a result, researchers are forced to move towards the concept of sustainable building development for achieving better indoor thermal comfort. As a reason, the green roofs are accepted as a better alternative for overcoming impacts of global warming. However, the performance of the green roofs in a tropical climate is not addressed in Sri Lanka under the effects of global warming. This study emphasized on experimental approach of the green roof and its performance was measured by using small scale models. Using these results, large scale buildings were developed to simulate the performance of green roof under the effects of global warming. It was discovered that green roof provides an acceptable indoor thermal performance for global warming analysis than traditional roof types in Sri Lanka and green roof can be proposed as an ideal solution for achieving better indoor thermal comfort against the global warming effects.