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Measure the temperature of exterior window and surrounding walls’ inner surface, and measure interior air temperature to analyze the effect, which was brought to building energy consumption and interior thermal conditions by the exterior window of the building; studied several details of exterior window design, and proposes a method, which is separately controlling the heat-transfer coefficient according to different orientation, room’s positions and room’s functions while designing the exterior windows, in order to improve the interior thermal conditions and reduce energy consumption of the residential buildings.

Using the Fluent software, the flow field of oxidation ditch was simulated by the three dimensional turbulence mathematical model. The velocities were analyzed and measured, and the simulation results showed acceptable prediction of the velocities in the oxidation ditch. The results also showed that velocity could reach more than 0.3m/s when 8 impellers worked, and MLSS in the whole ditch were almost uniform, therefore, the oxidation ditch runs well.