Study on Energy Efficiency of Several Different Roof Plants in Wuhan

Abstract

Abstract. The green roof is developing rapidly in China now, while different roof plants have prominent influence on the effect of energy saving and cooling. This passage uses Design Builder, which is a green building simulation software based on Energy Plus computing engine, to establish a typical low-rise residential building model in Wuhan. According to the integrated software parameters and the relevant standard and specifications, the paper set the design of the residential layout, indoor staff status, air conditioning settings and other settings related to the model. The summer energy saving and cooling effect of seven different roof plants were studied in this paper. The simulation results show that the leaf area index of the plant, the thermal reflectivity of the solar radiation and the heat gain of the roof in the summer were inversely proportional to each other. Plum has the best effect on summer energy saving and cooling in seven plants, and Fatsia japonica has the best effect on summer energy saving and cooling among three kinds of shrubs. IntroductionThe green roof is mainly reflected in its structural innovation of conventional roof, so that different kinds of green plants can be grown on it. Related theses show that the green roof has the properties of energy saving, land saving, water saving, protection of building structure, improving the urban ecological environment, enabling people to relax, etc. Combined with today's domestic outstanding ecological and environmental problems, the construction and research of green roof are of great significance. In the green roof construction process, the choice of roof plants is a crucial phase, good plant selection will play a multiplier effect. However, there are few studies which concentrated on the selection of plantation roof plants. Based on the successful commercial building energy consumption simulation software-Design Builder, this thesis studied summer air-conditioning cold load and summer heat gain when the roof is planted seven different kinds of roof plants. These seven different roof plant species are all derived from recommended central China roof plants of national architectural standard design 14J206"planting roof structure". This thesis hopes to find a higher energy efficiency roof plant and open up a practical approach for the comparison of roof plants.