| 摘要 |
PURPOSE:To get optimum control on pollution and efficient power consumption for ventilation by controlling the short-circuit phenomenon of ventilation by a method in which the number of jet fans in the early operation period at the time of starting exhaust air blowers is determined on the basis of measured data on VI meter and wind direction and speed meters. CONSTITUTION:Ventilating condition in a tunnel T is measured by VI meters 21 and anemoscope and anemometer 23 set in the tunnel T having different lengths T1 and T2 from an exhaust vertical pit Tv to both entrances. On the basis of the measured ventilation condition, air blowers 22 set in the pit Tv and jet fans 20 set in the tunnel T are controlled by a controller for ventilation of tunnel. At the time of starting the operation of the exhaust air blowers 22 from all stopped states, a given calculation is made on the basis of measured data of VI meters 21 and the anemoscope and anemometer 23 by means of a computer 10 for controlling, thereby determining the number of the jet fans 20 in the early operation period. |
