Measurement And Evaluation Of Energy Consumption Of Solar Energy And Building Integrated Internal And External Composite High Efficiency Thermal Insulation Shell Building

In recent years,with the accelerated development of industrialization and urbanization in China,the construction industry has become a major energy consumer.According to statistics,the total energy consumption for construction and construction in 2020 reached 2.27 billion tce,accounting for 45.5%of the total energy consumption in China.According to the current research trend,buildings are moving towards continuous improvement of quality,reduction of energy demand,improvement of energy utilization efficiency,and utilization of renewable energy.Building energy conservation is the most potential,direct,and effective approach of all energy conservation approaches,and it is also an effective measure to alleviate energy tension in China and solve the problems of socio-economic development and insufficient energy supply in China.Building energy efficiency includes:optimizing the design of building envelopes,energy-saving heating systems,improving the efficiency of lamps and other electrical appliances,and the utilization and development of renewable energy.Therefore,based on the optimal design of the building envelope,this paper takes an internal and external composite thermal insulation shell building project in Lanzhou area as the research object,conducts energy consumption simulation and actual measurement of its operating effect,and comprehensively analyzes and evaluates the energy consumption level and economic benefits of the building.The following three aspects are studied and conclusions are drawn:(1)Starting from the current research situation of exterior wall insulation of building envelope structures,this paper introduces the unsupported internal and external composite thermal insulation mold shell wall enclosure system,and sorts out its system structure and raw materials.By combining the simulation results of ANSYS software with actual test detection,and using the theoretical calculation results as a reference,under 12 connectors per square meter,it is concluded that the heat transfer coefficient of the unsupported inner and outer composite insulation mold shell wall is 0.453W/(m~2·K).The error between the ANSYS simulation results and the actual detection is about 4.2%,and the detection data is in good agreement with the simulation results.(2)In order to explore the extent of the impact of card board connectors on the thermal performance of walls in their structures,comparative analysis studies were conducted on walls without connectors,with different numbers of connectors,and with double-sided plastering using three methods,namely,thermal theoretical calculation,actual test detection,and ANSYS finite element simulation software.The results show that when the wall does not exceed 7 connectors per square meter,the heat transfer coefficient of the wall increases by 0.003 W/(m~2·K)for each additional connector,and the thermal bridge has no significant impact on thermal performance;When the wall exceeds 7 connectors per square meter,the heat transfer coefficient of the wall increases by 0.012 W/(m~2·K)for each additional connector,which has a significant impact on the thermal performance of the wall;When the wall exceeds 14or more connectors per square meter,consideration should be given to replacing the broken bridge connectors to reduce the thermal bridge effect of the connectors and ensure the thermal performance of the wall.(3)Based on the actual building project of internal and external composite thermal insulation shell enclosure structure,a renewable energy wind power generation system is introduced,and a solar energy and building integrated BIPV system design is proposed.Comparing the theoretical calculation with the measured value,the cumulative annual wind power generation capacity of the building is6534.83 k W·h,which can meet its annual energy consumption.Finally,the De ST building energy consumption software was used to simulate and analyze the building energy consumption of four different thicknesses of internal and external composite thermal insulation formwork walls.The data showed that using 150 mm thick HF composite thermal insulation formwork as the internal and external composite thermal insulation formwork system for the external formwork of the wall can meet the requirements of near zero energy consumption building indicators.