Analyze Of Window With Energy Efficiency Of High-Level Residential Building In Chongqing

The energy consumption of the residential building is the important constitution of the civilian building's energy consumption, and with the development of the economy, its proportion will increase more and more quickly. In our country, the underway time of building energy efficiency is later than the developed country, so the residential building's energy efficiency of our country has a long way to catch up with the developed country. Therefore, the building's energy efficiency especially the residential building's energy efficiency should be given much more consideration and be researched as an important task.Based on high-level residential buildings in Chongqing region as the research object, using DOE-2IN software, this paper have calculated out the impact on building energy consumption with a simulation of various parameters on the windows. As follows:1. Analyzed an impact of different heat transfer coefficien on directional window over building energy consumption:The heating coeffient over the building heating energy consumption is relevant to the window orientation and the area ratio of window to wall.Heating energy consumption and total energy consumption show a linear positive correlation with the heating coefficent of external window.With the area ratio of window to wall increasing the degree of heating coefficient on the impact of building energy consumption will increase gradually.The relationship between the cooling energy consumption and the heating coefficient of east window is linearity.To the same area ratio of window to wall,the impact of heating coefficient of south window over the coding energy consumption is minimal building. For the north window and west window, reducing their heat transmission coefficient, the cooling energy consumption will increas. From the point of view of reducing cooling energy consumption, reducing the heating coefficient of enteral window only makes little effect.On the same shading coefficient and the same area ratio of window to wall,the strength scquence of the impact of all directional window heating coefficient over the totalbuilding energy consumption from high to low is:south window→east window→west window→north window.2. Analysised the different relationship between the shading coefficient of the different directional window and the building energy consumption. We get the following conclusions:①For different orientation windows, the affect of shading coefficient to energy use of construct is different. The impact of east window shading coefficient over total energy consumption is most obvious and it is very necessary to save energy through reducing the shading coefficient of the east window .For the window towards north and the window towards south, reducing the shading coefficient, the total enegy will discrease ,however, From the total energy consumption ,it is not necessary to reduce shading coefficient for the lower rate is very small. To the west window, the relationship between the building enegy consumption and the shading coefficient is polynomial.To every area ration of window to wall, there is a reasonable shanding coefficient and the value will reduce while the area ratio of window to wall is increasing. The strength squenceses of the impact of all directional shading coefficient over the clloeng building energy consumption from strong to week is: west—north—south—east.②For the window faced the same direction.the larger area ratio of window to wall , the more obvious of shading coefficient impact the building energy consumption.3.Analyzed an impact of the average area ratio of window to wall of the air conditioning room which faced differently over building energy consumption:①The area ratio of window to wall over the building heating energy consumption is relevant to the window orientation and heating coefficient and shading coefficient.For east window and the south window, the relations between the heating energy consumption and area ratio of window to wall are linearity.For east window the impact of area ratio of window to wall over the building energy consumption strengthens gradually with heating coefficient enhancing.For the south window, the impact of area ratio of window to wall over the building energy consumption strengthens gradually with the lessening shading coefficient ,however, the increasing degree is not high .On the same shading coefficient for east window, the impact of area ratio of window to wall over the building energy consumption is the most obvious.②In all directional windows, the impact of area ratio of window to wall over the building cooling energy consumption increases linearly. And the degree of increase is relation to external window orientation and shading coefficient.③The degree of impact of area ratio of window to wall over total energy consumption in every orientation window is minimum for north window, maximum for east window. 4,Paralleled the infuences about the energy efficiency chang with these parameter, the heat transfer coefficient, shading coefficient and area ratio of window to wall. The results show that for east window, west window and south window, the impact of area ratio of window to wall over energy consumption is the most obvious, then that is the shading coefficient; for north window, the impact of shading coefficient over energy consumption is the most obvious, and then that is area ratio of window to wall. The degree impact of heat transfer coefficient over energy consumption is the minimal.