Passive Solar Energy Utilization Zoning And Design Strategy For Residential Buildings Based On Supply And Demand Ratio

Solar energy utilization is one of the ways to achieve the goal of zero energy consumption.It can not only save a lot of conventional energy and protect environmental resources,but also solve the problem of winter heating in resource-poor areas.Passive solar energy utilization is a simple,economical and effective way to use solar energy for heating,so as to achieve the purpose of saving building energy consumption.With the rapid development of China’s social economy,the requirements of building energy conservation are constantly improving.However,the proportion of building energy consumption in China is still huge,and the energy consumption of urban residential buildings accounts for the vast majority.In the face of the changing building forms and energy saving requirements,this paper proposes to re-recognize the suitability of solar energy utilization in China from the perspective of the overall heating demand and heating potential of each climate region,and explores the optimal design strategy combination of various passive strategies in each climate region.The research is mainly carried out from five aspects: zoning principle,zoning index selection,zoning method,zoning result analysis and calculation of optimal combination of design strategies.Firstly,through the discussion of the building climate zoning method,the hierarchical zoning method based on the comprehensive index was established in this paper.It was proposed that the passive solar energy zoning research should follow the principle of combining the comprehensive factor with the dominant factor and the spatial distribution continuity and the principle of taking the large and eliminating the small.Through studying the influence of direct and scattered radiation on urban residential buildings using solar energy for heating,it is found that direct radiation is more suitable to judge the potential of urban residential buildings using solar energy.Puts forward a new comprehensive applicability index-radiation than,this index includes not only the past research potential indicator of commonly used,the ratio of radiant temperature difference at the same time new joined the heating of the heating demand indicators-from several factors,integrated the two factors and the radiometric get treated with dimensions ratio can be expressed in a solar heating supply and demand situation,Based on this index,a regional map of the comprehensive applicability of passive solar energy utilization in China was obtained through GIS10.4.In view of both the passive solar use partition from the perspective of climate potential,not fully consider the demand of heating problems,this study proposed heating number to live as a judge index of each climate zone heating demand and aims at the current typical building thermal performance correction of calculation of heating period to calculate the critical temperature,to amend the original critical temperature5℃ for 12℃.Based on the classification of solar heating potential,the spatial distribution law of heating demand in China is further clarified.It is found that the northern region of China is the highest region of heating demand in China,which decreases with the latitude to the south.By comprehensively considering the influence of potential index and heating demand index,and converting the two index units in the same dimension,the ratio of the total daily radiation to the heating period degree hours,namely,the ratio of radiance degree hours,was obtained.Through calculation and interpolation,the distribution characteristics of the comprehensive applicability grade of solar energy utilization in China were obtained.Based on the analysis of spatial distribution characteristics,the regional consciousness of the most suitable solar heating is redefined: the best suitable area is the southern part of the Qinghai-Tibet Plateau and most of the temperate areas,and the least suitable area is the northeast area.When the construction cost,price performance and benefits are not considered,the heating potential division can be referred to,the greater the potential,the higher the availability;When considering the benefits,reference should be made to the general applicability zoning.The higher the general applicability,the greater the benefits to be gained from building residential buildings that utilize solar heating.In view of the existing research from rural building solar energy heating use potential bias problem,this study on urban residential buildings in heating energy consumption of the proportion of perspective,based on the principle of target population from 240 in line with the requirement of the meteorological offices and stations,and from urban residential buildings in the country based on supply and demand than the applicability of solar heating Angle were studied.Optimal passive design measures aiming at the lack of quantitative calculation method of the combination of design strategy,this research through the orthogonal test with different values of the passive design measures model for heat load simulation test standard,further on the value simulation,finally get the optimized design value,the corresponding optimal design values of passive design measures.A universal passive design method is established to simulate residential buildings in different design areas and obtain the optimal design values.In addition to obtaining the optimal value,the values of all the combination measures in a certain range of thermal load can also be obtained.When the overall applicability of the area is low,selecting the best value may result in higher costs.Therefore,when the cost-performance ratio needs to be considered,the corresponding combination of design measures and values under the condition of moderate energy consumption can be selected according to this method.