How the Green Roof is Effective in Reducing the Ambient Temperature

Abstract

The green roof is a roof that is mostly surrounded by vegetation and soil or is covered with a vegetative medium. Chlorophyll creation has a positive effect on the climate of the city and can also contribute positively to providing cool air inside the buildings. This cooling of air occurs by reducing the penetration of heat through the roof and providing stronger insulation to prevent indoor air to become warm. As a result, the indoor temperature can be efficiently decreased during summer and increased during winter. Decreasing power consumption is one of the major concerns for sustainability in cities. Making a roof garden is offered as one of the ways to reduce energy consumption in major cities. A roof garden or green roof - if properly designed and executed by considering climate issues - can greatly help to decrease energy consumption. Changing buildings roofs to green roofs could improve the exchange of air between areas of high building density and open spaces between them and accordingly adjust the city›s air moisture. This technology has several advantages including less wastage of heating and cooling, purification of air, reduction of noise corruption, and most importantly energy consumption efficiency – factors that can help the stabilization of city life. Due to the improvement in the social, economic, and environmental conditions, the development of green roofs has always been at the top of the agenda in advanced cities. Heat loss through the roof of the buildings is high and there is a lot of energy wastage in higher floors units. Therefore, the green roof is the answer to this problem. Green roofs by rising roofing coatings, act as thermal insulation and help control heat exchanges between the inside and beyond of the buildings. In the present research, behind recognizing the benefits of green roofs with this hypothesis that “green roof and how the design of the green roof has an effective role in reducing heat transfer” with help of analysis software called Ansys, three samples of conventional roofs, green roofs conventional and green roofs with a special detail (fiberglass layers) analyzed and heat transfer comparative compared. Also, installed heat sensors to confirm the thermal performance of green roofs for designed green tops and simple ample of normal green roof, point optimization of designed green roof respect to normal green roofs, heat performance-wise. With software analysis and laboratory samples, green roof compared to 50% less heat transfer rather conventional roof and a green roof with fiberglass coatings to 40% rather green roof conventional optimized. Shading and evaporative cooling plants and the role of roof coatings that all perform like insulation have an effective role in reducing heat transfer. In research, methodology research related to the benefits of green roofs is a defining and qualitative approach. But in sectors related to software analysis, these had a quantitative approach and analytical process.