Study On Ventilation Technology And Structure Optimization Of Solar Chimney

As China’s economic development is unprecedented rapid,China’s energy demand is huge,energy problem is imminent.The energy consumption of the construction industry is increasing day by day and has become the second largest sector of energy consumption.The energy consumption in the running stage of the building is large,and the energy consumption generated by the air conditioning system accounts for the main part.The key to solve the problem of high energy consumption in the running stage of the building through natural ventilation is how to increase the ventilation effect of natural ventilation and increase the use of natural ventilation technology in the building.As a passive technology to strengthen natural ventilation,solar chimney can improve natural ventilation volume and effectively reduce building energy consumption.More and more researchers and architects are applying the passive technology of solar chimneys to green buildings.As China’s economic development is unprecedented rapid,China’s energy demand is huge,energy problem is imminent.The energy consumption of the construction industry is increasing day by day and has become the second largest sector of energy consumption.The energy consumption in the running stage of the building is large,and the energy consumption generated by the air conditioning system accounts for the main part.The key to solve the problem of high energy consumption in the running stage of the building through natural ventilation is how to increase the ventilation effect of natural ventilation and increase the use of natural ventilation technology in the building.As a passive technology to strengthen natural ventilation,solar chimney can improve natural ventilation volume and effectively reduce building energy consumption.More and more researchers and architects are applying the passive technology of solar chimneys to green buildings.In this paper,the ventilation effect of the solar chimney is studied by means of physical experiment and numerical simulation,and the actual measurement results and numerical simulation results of the traditional vertical solar chimney are compared with that of the solar chimney in the collector,and the ventilation effect of the solar chimney in practical engineering is discussed.The experimental results show that the ventilation efficiency of the solar chimney is closely related to the solar radiation intensity.The actual ventilation efficiency of the solar chimney is slightly lower than that of the numerical simulation.In the actual working condition,the wind speed of the solar chimney with heat collecting panel is about 24% higher than that of the traditional vertical solar chimney.The numerical simulation is about 18%,and the ventilation volume in the numerical simulation is nearly 13% and 4%higher than that of the traditional vertical and insert insulation panels.In terms of wind velocity distribution and ventilation volume,the solar stack with heat collecting panel has significant advantages.Increasing the number of boundary layer by changing the position of the heat collecting plate inside the chimney has a significant effect on the ventilation efficiency of the solar chimney,and it has a certain feasibility in practical engineering application.The numerical analysis results show that the ventilation of solar chimney is positively correlated with height and width,and the recommended aspect ratio of the optimal structure size is 1/3～1/2,and the optimal boundary layer number is 2.The vertical solar chimney was placed in a building in Yichang to simulate the energy consumption.The energy-saving effect of the vertical solar chimney in the cooling season was 22%,and the feasibility of the solar chimney in passive buildings in Yichang was analyzed.