Life Cycle Cost Of The Hanging Wall Thermal Insulation System Based On The Thermal Performance

At present, the building energy consumption accounts for about 25% of total energy consumption, With the acceleration of urbanization level in China, this ratio Will continue to improve. To achieve the target of energy-saving to 65%, the emphasis is on improving the thermal insulation performance of building envelope, and the hanging Wall insulation system represents the future direction of development of technology of exterior Wall thermal insulation because of its unique advantage. The thermal insulation performance and construction cost of different dry-hanging Wall insulation system insulations are also different, you need to consider the cost of insulation Wall hanging of the full life cycle of the system, providing the basis for the selection of the Wall hanging insulation system in the construction projects. This paper takes four kinds of common external Wall dry hanging insulation system as the research objects to analyse the system of thermal insulation performances by the theoretical calculation, DeST simulation of energy consumption, demonstration engineering test data; and to calculate the total life cycle cost system by the full life cycle cost model. The main contents are as folloWs:(1)To analyse the advantages and disadvantages of exterior insulation and hanging method Wet paste style of the tWo methods, and introduce the commonly used construction methods, features, construction techniques of Wall hanging insulation systems.(2)Analysing the heat transfer mechanism of envelop enclosure to determine the calculation method of heat transfer coefficient, and analyse the heat transfer coefficient of the four Wall hanging insulation systems. To analyse the building energy consumptions of four using different dry Wall thermal insulation systems by the Dest building energy consumption analysis soft.(3)Starting from the definition of life cycle cost, to define the composition of the Whole life-cycle cost, to build the life cycle cost analysis mathematical model of Wall hanging insulation system combining the its characteristics.(4)To determine the cost of construction of four Wall hanging insulation system by the market cost method, and calculate the running costs of these systems by the air-conditioning, heating-degree days method, and determine the life-cycle cost of these systems by the life-cycle cost analysis mathematical models.(5)To real-time monitor the temperature and heat flux of t Wo demonstration project Which installing insulation decorative integration dry hanging Wall system, and analyse the distribution of the Winter and summer temperatures and heat flux in the first demonstration project. And calculate the thermal resistance and Winter and summer heat transfer coefficient according to the data, to analyze the distribution of temperature in summer on both sides of the Wall and the heat flux in the second tWo demonstration project, then evaluate objectively the application effect of the decoration integrated Wall dry-hanging insulation system.