The Effect of the Inclined Angel on the Output in a Solar Chimney Power Plant System
Numerical simulation in large-scale solar chimney is not usually studied in previous study. In this paper, the height of the chimney is 1km, and the collector radius is 2.5km. An unsteady two-dimensional axis symmetric numerical simulation is studied. The radiate heat transfer condition is converted to a constant heat flux boundary condition in the calculation. The pressure inlet and outlet conditions are used in the entrance and exit of the solar chimney plant. The results show that the output of the solar system was reinforced with the decreasing the inclined angel about the collector upper wall. Increasing the heat flux in the wall, the velocity has not increased obviously. It has been found that there exist some vortexes at the entrance of the collector. These vortexes can prevent the air from flowing into the plant system, which may decrease the efficiency of the solar chimney. Moreover, though the heat flux at the wall was increased from 600W/m2 to 1200 W/m2, only has the velocity increased a little, which indicates that the high heat flux has caused more vortexes than low high heat flux.
Solar chimney Numerical calculation Inclined angel Vortex
J.M.Sun M.Yang Y.G.Shan
Institute of Thermal Engineering, University of Shanghai for Science & Technology, Shanghai, China
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）