Study On Heat And Moisture Transfer Characteristics Of Exterior Wall Of Air-Conditioned Room In Extreme Hot And Humid Climate

Energy is an important material basis of human activities,is to promote the development of social productive forces,the fate of the future depends on the fate of the country's control of energy.Energy conservation should start with reducing energy consumption.The total energy consumption of society is divided into two kinds of energy consumption and living energy consumption,and energy consumption in life is the largest link in the transport and construction.Most of the energy used in the building is consumed in the heating and cooling.It is very important to study the heat and moisture transfer process inside the envelope to improve the thermal insulation design and reduce the building energy consumption.In the extreme hot and humid climate area,the annual temperature and humidity are very high.Under the influence of climatic conditions,the wall may contain more moisture,which will lead to more cooling loss.Therefore,for the hot and humid climate conditions,it's very necessary to do the research.In this paper,the meteorological data of extreme hot and humid climate regions and typical hot and humid climate cities in China are compared and compared with the typical hot and humid climate in this area,which is characterized by high temperature and high humidity for a long time,accompanied by strong solar radiation and strong winds Weather,the external walls of the house heat and moisture transfer have a great impact.Based on the classical principle of heat and moisture transfer,the coupling mechanism between heat transfer and moisture transfer in porous materials under extremely humid climatic condition is analyzed,and the coupling between temperature and air relative humidity is driven The heat and moisture transfer equations which are suitable for use in extreme hot and humid climatic conditions are established and the boundary conditions are established by means of conservation of mass and conservation of energy.And then use COMSOL multi-physics coupling simulation software to carry out discrete calculation.Finally,the model is verified by the HUMSTAD experiment,which provides a reference for the study of heat and moisture transfer in this area and the study of envelope structure.Finally,this paper also uses the model to calculate and analyze the factors such as heat and moisture coupling and heat transfer,internal insulation and external insulation,different insulation thickness,different interior design temperature,and whether solar radiation and other factors for extreme hot weather conditions outside the air-conditioned room Wall of the role of hot and humid state.It is concluded that the wet transfer can obviously reduce the temperature amplitude in the wall and is not suitable for the use of external insulation in the case of extreme hot and humid climate.For the 24-hour air conditioning operation,the thickness of the insulation layer is different for the heat The temperature of the indoor air-conditioning should not be too low;the region's strong solar radiation will lead to the outer surface of the external wall temperature rise 1-2 ? and the wall temperature fluctuations and solar radiation intensity similar to the regularity And so on.