| With the increasing progress of urbanization,people's demand for the quality of residential life has continued to increase.However,residential buildings in China generally have problems such as low thermal insulation and low heating rates,which makes the building's thermal insulation performance and indoor temperature environment more More and more social attention.At present,the main wall insulation technology in China is the external wall insulation technology,but this kind of insulation method is relatively simple and only has a certain thermal insulation effect.At the same time,the emerging Trombe wall not only has a certain thermal insulation effect,It also has a certain indoor temperature adjustment function.The article mainly takes the Changsha building in the hot summer and cold winter area as the research object,and uses a combination of theoretical analysis and experimental analysis to study the mechanism of Trombe wall and external wall insulation on room temperature changes.In a specific period of time,a comparative analysis of the temperature change of the trombe wall and the external insulation wall in the indoor temperature is provided,which will provide a reference for the future related field projects.The specific research contents are as follows:(1)Summarizing the research status of trombe wall and external wall insulation at home and abroad,and draw the back ground and significance of the study.(2)The basic forms of external wall insulation and Trombe wall insulation are introduced,and the effect mechanism of external wall insulation and Trombe wall insulation on the change of indoor temperature is analyzed.According to the heat transfer theory,indoor wind pressure,and indoor thermal pressure ventilation The thermal insulation performance of the Trombe wall and the external thermal insulation wall and the indoor and outdoor temperature changes in summer and winter in hot and cold winter regions were analyzed theoretically and simulated experimentally.(3)The paper is based on the comparison of related theoretical analysis and experimental results,the results of residential buildings with Trumbo wall structure and external wall combined thermal insulation structure in summer and winter are compared and analyzed.The indoor temperature of the external thermal insulation wall is generally higher in summer,The maximum value is 33.6?,the indoor temperature inside the Trumbo wall is generally low,the maximum value is 30.6?,and the temperature difference reaches 3?;in the winter simulation,the outdoor day and night temperature changes greatly,the outer window is closed,and the indoor air flows Weak,the highest temperature inside the outer insulation wall is 17?,the highest temperature inside the Trumbo wall is 19.2?,the temperature difference between the Trumbo wall and the outer insulation wall is about 2.2?.The theoretical calculations obtained from the analysis and the experimental results are in line with the conclusions.(4)The human thermal response represented by PMV that Calculate and compare the indoor temperature and thermal comfort of Trumbull wall and external insulation wall based on the evaluation index of PMV characterizing human thermal response.The minimum value of PMV in the outer insulation wall is 0.6,the highest value is 2.07,and the temperature of Trumbo wall is indoor.The lowest value of PMV is 0.6 and the highest value is 1.93;the indoor PMV value of the external insulation wall in winter is the lowest-1.2 and the highest 0.59,and the maximum PMV value of the Trumbo wall in winter is 0.77,which is higher than 0.59.Compared with the external insulation wall,the Trumbo wall can bring better thermal comfort to the human body in summer and winter. |
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