Energy Consumption Of Residential Buildings In Hot Summer And Warm Winter Zone Based On Window Performance

At present,the area of new buildings in our country increases by 17 ~ 1.8 billion per year,and the existing residential buildings have already exceeded 60 billion m 2.Due to the aging of the building structure and other problems,nearly 90% of them have been seriously consumed by the residents who have not been renovated.As the country has strengthened the energy legislation,various energy-saving indicators and policies are also constantly improving and perfecting,through these laws and regulations and policy constraints,our country has made great achievements in building energy-saving work;But there will be a large number of existing buildings that do not meet the requirements of the current energy conservation regulations in the groping period when the new regulations have not yet been established.On the one hand,these buildings have not been built in the process of construction.Considering the energy-saving requirements of buildings,on the other hand,with the change of the age,the aging of the building envelope structure appears serious thermal defects,which leads to this kind of buildings becoming high-energy-consuming buildings.The energy shortage and high energy consumption building in our country make the implementation of energy saving research urgent.In the whole building energy saving system,the window is not only the heat-loss component,but also the heat-receiving component.The balance of indoor temperature and humidity is related to the air tightness of windows.When simulating the energy consumption and energy saving of residential windows,it is necessary to consider different regions,different climatic conditions,economic factors and so on.In order to reduce the energy consumption of high-energy-consuming buildings,it is the focus of this paper to choose the energy-saving improvement scheme of windows according to the local conditions.The main research contents of this paper are as follows:Firstly,the thermal performance and air tightness of the windows of the target building are measured using the FLIR infrared thermal image and the air quality detector.The process is as follows:(1)In Guangzhou,Shaoguan,Zhaoqing,Heyuan and Yangjiang five sites,a total of362 building windows were measured in four periods.Compared with 185 windows with thermal defects,the glass temperature distribution of windows was analyzed.The thermal image is plotted into 3D graphics with the software python.The temperature distribution inside and outside the window is analyzed from the three-dimensional perspective,and the distribution of the temperature inside and outside the window is summarized.(2)The air quality detector is used to detect indoor and outdoor particulate matter concentrations and air humidity in the windows of the target building,and to measure indoor and outdoor particulate matter and the time of humidity balance every 5 minutes.the air tightness of the window is reflected by the balance of time.Secondly,the Design Builder simulation software is used to simulate and calculate the window reconstruction scheme obtained by the measured analysis.Taking one ladder and two houses as an example,the annual energy consumption of the residential building with different window structures and different orientations is calculated.829440 data of dehumidifying season,cooling season and northern heating season in 8 rooms were summarized and analyzed,and the comparison of energy consumption in different windows,different facing rooms and different energy use seasons was obtained,and the measured results were verified.Thirdly,the optimal scheme obtained by simulation calculation is applied to the transformation of energy saving in hot summer and warm winter areas.Different air conditioning forms are used to compare the energy saving benefits and analyze its economy.The results show that:1.The initial residential buildings from the Seventh five-year Plan to the Tenth five-year Plan have self-modified single-glass push-pull plastic windows,and the difference of temperature distribution between the window frame and the wire is 0.6 ~0.8 ?.The thermal defects of the modified windows are relatively small,so they have greater energy saving potential.The unmodified window frame wire temperature difference is between 1.6 and 2.7 ?,and the westward window frame line temperaturedifference is 1.3 ~ 2.7 ?,the difference of line temperature is higher than that of other orientations.The recent residence after the 13 th five-year Plan uses double glass windows with excellent performance of heat insulation and moisture insulation.2.The results of Design Builder simulation show that the cooling consumption and heat consumption are reduced by 7.5% and 11.3% respectively when the single glass aluminum alloy is replaced with the single glass plastic window.The cooling consumption and heat consumption were reduced by 33.9% and 28.6% respectively,and by 42.4% and 57.6% respectively.South-to-south windows have the highest energy-saving benefits and double-glass push-pull windows to the south have energy savings of 62.1% in the heating season,while westbound windows are more energy efficient than eastbound windows,although initial load It is higher,but the energy saving rate is higher after revamping.The influence of window frame on energy consumption is smaller than that of window glass,and the influence of window frame on heat consumption is higher than that on cooling consumption.3.The economical analysis of south double glass push-pull plastic window and single glass aluminum alloy window is carried out.By comparing the two-glass push-pull plastic window and single glass aluminum alloy window in the initial civil residence,the indoor air-conditioning with frequency conversion is adopted.The energy consumption of refrigeration dehumidifying with double-glass push-pull window has been reduced by 9301.1 kw in one year,the 10-year energy use income is 19134 yuan,and the annual energy-saving income per unit of building area is 6.8yuan.If summer is hot and warm in winter,North District uses winter heating,the 10-year energy consumption income is 23816 yuan.