Eco-design On The Roof Of Buildings In Cold Area

Eco-design is a way to design on environment effect and energy consumption. Planting roof as a eco-design way, settle the contradiction between building area and green area, realize the symbiosis of human and natural environment, produce active significance for improving the cities' environment. Otherwise, in cold area of China, the effect of planting roof on the buildings' energy consumption was not appreciated enough.This paper, firstly, analyze that the cold climate effect the planting roof and the thermal process of planting roof in winter. Through the test of the planting roof in winter and the simulation calculation, analyze quantitatively and compare quality the performance of insulation thermal of planting roof. Pointed that the thermal resistance of grass is 0.05(m2 ? K)/w in winter when we calculate the thermal performance of planting roof and LAI is seven.Then study the performance of insulation thermal of planting roof. Analyze that the thermal process of planting roof and insulation thermal cause of the planting roof in summer. Through the test of the planting roof in summer and the simulation calculation applying the method of thermal balance, compare quality the performance of insulation thermal of planting roofs every level, check the performance of insulation thermal with 0. 5(m2 · K)/w equivalent the evaporation cooling and quality of the evaporation cooling in fact, respectively, the discrepancy of the two results is 0.5 ℃, indicate that insulation thermal with 0. 5(m2 · K)/w equivalent the evaporation cooling is conservative and the evaporation cooling should be calculated based the actual condition.Lastly, analyze and compare the planting roof system of current construction and the traditional dwelling. Point some problems on the current planting roof system. Associate the demand of landscape and architecture, present the construction system fitting cold area and fulfilling the energy saving 50%.