Comparison and optimization of long distance air supply system schemes in deep-earth space

Taking a long distance air supply system in a deep-earth space as an example,Ventsim software is used to calculate the changes of fan pressure and pipeline resistance of four air volume adjustment schemes,two optimization methods of increasing the number of main pipe fans and changing the position of the air inlet shaft are proposed,and the changes of pipe network impedance and equivalent orifice area in the air supply system are analyses in this paper.The results show that the pipe network impedance and equivalent orifice area of the optimized air supply system can be reduced by 0.102 kg/m7and 0.030 m2,respectively.The scientific air supply scheme can not only meet the air volume demand,but also reduce the resistance of the long distance air supply system,which has good energy saving and economic benefits.