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In this paper, the finite method is applied and ABAQUS software is used, the vortex flow field is loaded as boundary condition of wraps. The stress and deformation in scroll under the action of gas pressure, temperature load and both of them is analyzed, the stress distribution and deformation of wraps in different shaft rotation angles is discussed, the stress distribution and deformation discipline of wraps are also respectively obtained. The results show that the overall stress and deformation in scroll are the largest when compression chamber is moving near the vent position and the thermal deformation is the main factor of affecting the overall deformation of scroll.

In order to choose a financial and suitable wind power system, the analysis of different wind power system is necessary. The paper reviewed several kinds of commonly used wind power system, given the topology structure same and different placesgenerator types respective advantages and disadvantages and applicable range of them. Compared and analysed direct-drive PMSG system and constant speed constant frequency SCIG system .Finally discussed the development trend of wind power generation system and the work emphasis in the future. It has certain reference value for research and choose of wind power system.

The mathematical model to determine the main parameters of the solar street lamp has been built. The structure and the main parameters of the solar street lamp were analyzed in the paper. The yearly average optimal tilted angle for the solar cell module used in Qujing is approximately 23.75o. For a 60 W high brightness DC LED lamp, the area of the solar cell and the battery capacity to meet the energy consumption of the solar street lamp are 3.67 m2 and 2.89 MJ, respectively.

In order to improve electric efficiency of solar cell arrays and obtain available heat energy, the solar trough concentration photovoltaic/thermal system has been constructed and the experiment performance and analysis of solar cell arrays have been carried out. The results show that in concentration the thermal efficiency of system linearly decreases with the temperature of cell arrays increasing. In non-concentration, the maximum power output (Pm) temperature coefficients of single crystalline silicon solar cell, polycrystalline silicon cell array and super cell array are -0.2 W/(m2·°C), -0.15 W/(m2·°C) and -0.16 W/(m2·°C), respectively. In concentration, the Pm temperature coefficients are -11.8 W/(m2·°C), -5.9 W/(m2·°C) and -5.1 W/(m2·°C).