Natural ventilation cooling device and method of tunnels

Abstract

The invention relates to a natural ventilation cooling method for tunnels. The method is characterized in that natural ventilation holes are formed in a tunnel spacing board, and directional adjusting shutters are arranged in the natural ventilation holes; hot airflow in the high-temperature airflow side of the outlet tunnel passes through the front portions of the natural ventilation holes to enter the inlet tunnel, at the moment, local static pressure of the rear portions of the natural ventilation holes is relatively lower than static pressure of the inlet tunnel, and therefore the airflow on the side of the inlet tunnel passes through the rear portions of the natural ventilation holes to enter the outlet tunnel under the pressure difference effect, so that heat exchange of airflows in the inlet channel and the outlet channel is achieved; and the natural ventilation holes are formed in the area 0.25 d to 0.75 d away from jet fans in the car running direction of the tunnels, wherein the d is the distance between every two jet fans. The natural ventilation cooling method has the advantages of effectively reducing the temperature of air in the outlet tunnel, obviously improving the hot environment of the periphery of the outlet tunnel, and ensuring normal passing and work of drivers and passengers and tunnel overhauling personnel. In addition, the method is simple in implementation and capable of effectively reducing engineering investment, has the higher practicability and can be popularized in a large-scale manner.

Description

technical field [0001] The invention relates to tunnels, in particular to a natural ventilation and cooling method for tunnels, and is especially suitable for projects with long ventilation sections, large traffic volume and high temperature at the entrance of the tunnel. Background technique [0002] In a tunnel with cars as the main traffic function, while the tunnel and the ground are exchanging heat, the heat dissipation of cars and lighting fixtures and other equipment will heat up the air in the tunnel. Therefore, the air temperature in the tunnel is not only related to the surrounding In addition, it is also related to factors such as tunnel length, traffic volume, tunnel ventilation mode, and wind speed. Generally, the traffic volume of highway tunnels is small and the passing speed of cars is fast. The temperature in the tunnel is mainly controlled by the formation temperature, and the temperature changes little, which will not affect the normal operation of the tun...

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Problems solved by technology

[0003] The cooling methods used in tunnels include ventilation, cold air supply, and laying of cold water pipes. However, road tunnels have high temperatures, large air volumes, and poor air cleanliness. The use of ordinary cooling technologies is expensive and the engineering feasibility is poor.

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