Research on Intelligent Ventilation Control for Complex Underground Caverns during the Construction of Jinping Large Facility
The Jinping Large Facility is a multi-cavern with a multi-working face,its ventilation network is complex.In order to ensure the air quality of the cavern and solve the problem of high energy consumption of ventilation during construction,the construction ventilation calculation was carried out,by optimizing the calculation method of the required air volume of the tunnel to determine the loss of wind pressure resistance.According to the location of the fan,the air supply and exhaust area were divided,and the fan control area was defined.Based on the air volume and wind pressure of each region,the calculation formula of fan operation power was obtained,the fan gear was subdivided,and the frequency conversion adjustment strategy of the fan during the construction of underground caverns was formed.By arranging air quality monitoring equipment and establishing a software platform,the air quality of the underground cavern is visually monitored remotely,and the data of automatic monitoring and processing were used to guide the frequency converter to control the frequency conversion of the fan,and the effectiveness of the frequency conversion ventilation is verified by the pollutant concentration monitoring data.The research results show that:1)The operating frequency of the fan can change with the concentration of pollutants in the tunnel;2)Intelligent ventilation control can effectively reduce the concentration of pollutants in time;3)The intelligent ventilation control can reduce the energy consumption of construction ventilation,and realize intelligent ventilation during construction.
underground cavernconstruction ventilationfrequency conversion fanremote control
万方数据
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