Study On Heat Distribution And Design Strategy Of The Room Heated By Trombe Wall

Trombe wall is a very effective passive solar technology.Since its introduction in 1956,there have been many research and practical applications for its thermal performance evaluation and improvement.However,trombe wall has not been widely used in China.One important reason is that architects only knows litter about the energy-saving theory of heat collecting and heat storage,so he will not use it during design,and can not optimize or use it creatively.In this paper,the space based on the principle of heat collecting and heat storage is analyzed.The space is divided into two parts:the heat collecting heat storage space and the direct impact space.The optimization direction is explained for these two parts.The heat distribution of thetrombe wall room will be further studied below.In the existing research,there are few researches on the effect of trombe walls from the perspective of space.In view of the fact that existing trombe walls are mostly used in residential buildings,this paper will locate the study on collective residence.This thesis will analyze of the thermal theory of the trombe wall,simplify the physical model of the trombe wall and simulate the the indoor space temperature field,flow field,heating energy consumption and average temperture.The results of these effects are combined with the analysis of the building space to obtain the the spatial distribution pattern of the indoor temperature,air flow rate,heating energy consumption and the qualitative relationship between the spatial changes and the influence of trombe wall.Then these rules are transformed into the using and designing strategies of trombe wall room.The feasibility and effectiveness of these strategies are illustrated by the comparison of residential case simulations.The laws and corresponding design strategies of this thesis are as follows:(1)The solar radiation intensity is the most important factor affecting the effect of trombe wall.The higher the radiation intensity,the more obvious the temperature rise.Based on the simulated temperature and energy consumption data,the using strategy of trombe wall room is:It is not recommended to use trombe wall room in areas where the normal radiation intensity is less than 200 W/m~2 during the heating period.Areas where the normal radiation intensity is more than 200 W/m~2 during the heating period are suitable for trombe wall room using,especially for the place where the normal radiation intensity is more than 300 W/m~2.(2)The isotherms of the internal temperature field are mostly vertically distributed.When the radiation intensity is given,the air temperature value change at each depth can be known through a functional relationship.The most effective range of the effect of trombe wall on indoor air temperature is between 0-7m in depth.Air temperature change is small in areas with depths greater than 7m.The increase in depth has less influence on the heating effect of trombe wall.According to this law,the design strategy is:Connect the trombe wall room to the inner room to increase the depth of the room.For example,when the balcony uses trombe wall,connect the balcony to the inner room to improve the efficiency of trombe wall room.(3)As the height of the layer becomes higher,the height of trombe wall increases.The heating capacity of the heat collecting wall also increases and the temperature in the room increases during the day.According to this law,the design strategy is:For the top floor plan of the collective house,the shape of the room can be changed so that the height of trombe wall can be increased to enlarge the area and the heating effect of trombe wall room can be improved.(4)The width of trombe wall increases,the average indoor temperature during the heating period increases,the heating energy consumption decreases,and the efficiency of trombe wall increases accordingly.According to this law,the design strategies are:Adjusting the size of southern windows of the apartment to expand the width of trombe wall and increase its area.Merging the southern rooms to centrally arrange the trombe wall and increase the area of each single trombe wall.Both strategies can improve the efficiency of trombe wall room.By demonstrating the influence of trombe wall on the interior of the building,the using and designing strategy,it is hoped that trombe wall room can be better integrated with the architecture design and there is a wider and more effective use of it.