Cost Present Value Method Optimization of Two Wing Diagonal Ventilation System
In order to analyze the economic characteristics of mine ventilation systems during the operational cycle,a technical and economic indicator system for ventilation systems is established.This involves analyzing the technical and economic characteristics of a single return airway under fixed air volume conditions and the technical and economic characteristics of bilateral diagonal ventilation systems under different air volume distribution schemes.Results show that the resistance of the ventilation system,fan power,return airway wind speed,fan purchase cost,and annual operating electricity cost linearly decrease as the cross-sectional area of the return airway increases,while the infrastructure cost and annual maintenance cost linearly increase with the increase of the return airway's cross-sectional area.The initial investment for the return airway increases with the increase of the cross-sectional area,but the later operational costs decrease with the increase of the cross-sectional area.There are decreasing and increasing intervals for the present value of the return airway costs as the cross-sectional area of the return airway tunnel increases,with a minimum value present.The return airway should be constructed based on economical cross-section and wind speed.According to the different present values of costs when the air volume distribution scheme in the return airway of the ventilation system changes,rationally distributing the air volume to the bilateral return airways and then determining the economic cross-section parameters of the return airway can improve the economic efficiency of the ventilation system.
two wing opposite angle typepresent costeconomic sectioneconomic wind speed
万方数据
维普
