Research On The Effect Of Wall Greening On Building Energy Consumption In Hot Summer And Cold Winter Arears

Building energy consumption has been accelerating since the 1970 s and currently accounts for 33% of the world’s final energy consumption.The building-related service subcontractor sector accounts for one-quarter of the total energy consumption,while the remaining three-quarters of the energy is consumed by residential buildings,that is,40% of the world’s building energy is used to provide heating and cooling.According to the prediction of the China Energy Conservation Association,carbon emissions should be reduced by about 30% by 2050.Therefore,the issue of reducing building energy consumption needs to be addressed as a priority.With the advancement of our country’s urbanization process,the scale of cities continues to expand,the urban population tends to be dense,and a series of environmental problems brought about by urbanization have become increasingly prominent.In the context of conflicts between pollution and urban development,the importance of urban greening is becoming more and more prominent.The main work of this paper is to simulate the thermal environment comfort and energy-saving performance of several different wall greening systems on the basis of actual measurement.In the first stage,the representative wall greening buildings in Chengdu were measured,the relevant parameters of the thermal environment were analyzed,and the comfort performance of the wall greening in real life was studied.The test results show that the buildings using the wall greening are relative to Buildings with exposed exterior walls have small indoor temperature fluctuations,which is beneficial to reduce the indoor air conditioning refrigeration load.In the second stage,the wall greening of different types and attributes is simulated to study its thermal comfort and building energy consumption in theory and simulation.Several different types of simulation are carried out to observe the wall greening performance of small rooms similar to houses.The simulation results of energy consumption show that the average energy consumption of Wisteria is reduced by0.83 kW·h and 1.3% when LAI is 1,compared with that of Parthenocissus Tigris.The average energy consumption of Parthenocissus Tigris with LAI 2 is 1.3 kW·h and 2.0% lower than that of Parthenocissus Tigris with LAI 1.Wisteria as a wall greening plant has better energy-saving performance than Parthenocissus.The larger the leaf area index of the same plant,the greater the impact on indoor energy consumption.The results have certain reference value for the selection and use of wall greening plants in Chengdu.