Study On Heat Transfer Characteristics And Energy Saving Of Rural Resifential Envelopes In Could Regions

With the steady development of the country's new rural construction and the strategy of precision poverty alleviation,rural residential buildings have reached the peak period of upgrading,but the insulation performance of the envelope structure is poor,the construction technology is lack of science,and the energy consumption mode is loose and free,they are all the main factors of building energy consumption.With the increasing energy issues,building energy conservation has received much attention,and rural building energy conservation has become a key way to save energy.Recently,computer simulation technology has developed rapidly.The building energy consumption simulation analysis software is used to analyze the system energy consumption of existing buildings and new buildings,which can provide an important basis for building design and building structure selection.Based on the actual research test and software simulation calculations,this paper studies and analyzes the energy consumption of rural residential buildings and the unsteady heat transfer characteristics of the surrounding structural materials in the cold regions,and finally passes the heat transfer to the various retaining structures and thermal insulation materials.The analysis and comparison and the calculation of building energy consumption result in a better combination of structural materials to achieve the purpose of reducing building energy consumption and improving indoor comfort.First of all,through the field visit,a preliminary understanding of the structure and energy consumption of the residential buildings in rural areas in the cold regions was carried out.The typical rural residential buildings in cold regions were selected,and the energy consumption in the middle and late stages of heating was tested and the test results were analyzed.The simulation software was used to calculate and analyze under certain conditions,and the reliability of the software simulation results was verified by comparison with the test results.Then,combined with the building simulation software of rural residents,the detailed dynamic energy analysis of the envelope structure and insulation materials that affect the building energy consumption are carried out to study its impact on the load,and the economics of the materials are considered to give a preferred scheme.Based on the optimal scheme,the residential building model and the sample building model adopt the continuous heating mode and the intermittent heating mode respectively.By comparing the energy consumption calculations of the two models,two conclusions can be drawn.Firstly,the sample building model is compared with the building model with better scheme,the heating energy consumption is effectively reduced,and the indoor thermal comfort is significantly improved.Secondly,the intermittent heating mode is lower than the continuous heating mode,and the indoor uncomfortable hours are large.In addition to improving the thermal insulation performance of the building envelope,adjusting the interior design temperature according to the function of each hot zone and stopping the heating of the room without heating can also reduce the building energy consumption.Therefore,when designing the heating system,The use function of each room is reasonably designed to avoid excessive or too small system design,resulting in waste of energy.Finally,the building heating model of the better structural material combination scheme obtained in this paper is used to calculate the building heating energy consumption in other cold regions.The results can provide reference for the design of rural residential buildings in other cold regions.