The Heat Insulation Of JingTian Green Roof Plants In Summer

At present, the green roof of the eco-efficiency energy-saving has been consistently affirmed, green roof technology research and application has been made many achievements in national building energy efficiency throughout the work vigorously to promote the adoption of such ecological energy-saving technologies, in this the , To Crassulaceae a green plant materials for the light green roof system has been an unprecedented rapid development.In this paper, the purpose of the study will address this kind of easy to promote the use of the green roof form, in its study of indoor air-conditioned environment and the effects of thermal insulation properties, such as energy-saving light green roof in the construction of the basis of accumulated data, To promote the application of ecological energy-saving technologies and create a better socio-economic and environmental benefits of reference.In this paper, the use of green roof and a common roof in the summer of Chongqing contrast thermal pilot study. Its first measured in the summer heat for the relevant parameters, including the green roof plants Crassulaceae solar radiation absorption coefficient of 0.85, its solar radiation shielding coefficient of 0.14, the plants on the soil moisture evaporation plays a certain effect. Following is the full course of time the various climatic conditions of the insulation effect: green-covered, weather-and Qingyu green roof insulation rate is 84% even after the 15 sunny, green roof insulation rate is 78 % Green withered after the 13 even in sunny, green roof insulation rate is 44 percent, during the entire experiment green roof insulation rate is 68 percent. Experimental results show that Crassulaceae green roof plants in relation to the general can contribute significantly to the roof from the roof to reduce heat flow into the room, a very obvious advantage. However, the insulating effect and it is closely related to climate, the number of rainfall will significantly impact the entire system of the wet, thus affecting the green roof insulation effect.And is based on the measured effect of the insulation comparative experiment with the idea of a green roof plants Crassulaceae roof and contrast between the thermal performance analysis. Green insulation from the roof on the principle of starting with green roof insulation in the course of three components of their thermal parameters and determination. Experimental use of the previous chapter received the relevant data, obtained Crassulaceae plants green roof of the thermal equivalent parameters, including:(1) response to the effects of plant cover Crassulaceae plant leaf area index LAI equivalent value of 3.(2) to propose comprehensive outdoor temperature is calculated parameters of the outer surface of the roof, the roof is still used within the parameters of the green roof surface temperature thermal resistance equivalent calculation formula, which calculated throughout the summer during the experiment of green roofs average thermal resistance equivalent to 3.9 square meters * K / W, compared to 0.6 square meters roof resistance * K / W.Measured the effectiveness and thermal properties such as the greening of the application and promotion accumulation of a large number of parameters of the basic data.