| Wind-driven rain is the main source of water in the vertical interface of buildings,which has a great influence on the heat and humidity transfer of walls,indoor heat and humidity environment and building energy consumption.In this paper,the research team built an experimental cabin for simulating the whole climate environment,and realized the reproduction of typical wind-driven rain weather days in the cabin.Taking Guangzhou,a typical city in hot summer and warm winter,as an example,the experimental research on building vertical and interface natural evaporation and cooling with different rainfall processes and different interface materials was carried out.The building energy consumption calculation and the annual dynamic simulation of heat and moisture transfer of the wall are carried out through numerical simulation software.The work contents and results are as follows:(1)Wind-driven rain field experiment with high time resolution: Self-made winddriven rain collector measures wind-driven rain capture amount of building vertical interface under real wind-driven weather conditions and verifies it.(2)the typical wind drive rain weather day selection: based on the classification of research methods,the wind speed,wind direction,rainfall intensity,rainfall duration,solar radiation,air temperature,relative humidity climate as an original variable parameters,through the principal component analysis and cluster analysis of meteorological data processing,and is typical wind drive rain weather,guangzhou area.(3)Thermal and wet physical properties of vertical interface experimental materials: Field research was conducted in guangzhou material market,and common interface materials were selected to test their thermal and wet physical properties such as water absorption,water absorption curve,thermal conductivity and specific heat capacity.(4)Experiments on the influence of wind-driven rain process and interface materials on evaporation and cooling of building vertical interface: The evaporation process of the vertical interface under the conditions of different wind driving process and interface materials was analyzed.The influence of the internal and external surface temperature,relative humidity,water content,heat flow and wind driving rainfall on the evaporation cooling process was analyzed.The water absorption rate of the interface material has a great influence on the evaporation and cooling of the vertical interface.For the materials with low water absorption rate,the influence of wind driving rain on the ceramic tile interface is mainly reflected in the direct cooling of the rainfall process.The materials with higher water absorption have better evaporative cooling capacity and stronger peak-clipping effect.The maximum surface temperature can be reduced by 1.45℃,and the evaporative cooling effect can last 48-84 hours.The wind-driven process has a great influence on the evaporation and cooling of the vertical interface,and the longer rainfall process can promote the absorption of wind-driven material and the migration of water to the depth of the wall.The evaporative cooling effect brought by wind and rain can last 48-72 hours.(5)Dynamic simulation of thermal and wet heat transfer of envelope under winddriven rain: According to the measured experimental WUFI software hot wet coupling model and wind driving rain in guangzhou area calibration,the accuracy and applicability of considering wind driving rain and does not consider the wind driving rain,under the condition of heat transfer of clay sintered brick and tile wall for dynamic simulation and energy consumption calculation,analysis of water content,temperature,relative humidity,the differences between the inside and outside surface heat flow,building energy consumption.Wind flooding can significantly reduce building cooling energy consumption,reduce indoor heat gain in summer and increase indoor humidity.In the case of not considering wind flooding,the energy consumption of cooling of ceramic tile and clay sintering brick wall is overestimated by 11.26% and 14.53%respectively... |
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