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Kuang Feng
Tunnel fans are also called jet fans. Since tunnels and underground railways are tens of meters below the surface, natural wind is not enough at the entrances and exits of tunnels and underground railway stations. Tunnel fans must be installed to move and condition air or remove soot (smoke from cars passing through the tunnel). ,for the needs of staff and passengers. Tunnel fan (jet fan) is a special axial flow fan, mainly used in longitudinal ventilation systems of roads, railways, and subways. Generally hung on the top or both sides of the tunnel, it does not occupy the traffic area, does not require the construction of additional air ducts, and is low in cost. The fan is easy to install, easy to operate and maintain, and is a very economical ventilation method. When the tunnel fan (jet fan) is running, part of the air in the tunnel is sucked in from one end of the fan, accelerated by the impeller, and ejected from the other end of the fan at high speed. This part of the high-speed airflow with higher kinetic energy transfers energy to other gases in the tunnel and generates a pressure rise that overcomes the tunnel resistance, thus pushing the air in the tunnel to flow in the direction of the jet fan. When the flow velocity decreases to a certain level, the next group of fans continues to work. This achieves the purpose of sucking in fresh air from one end of the tunnel and exhausting dirty air from the other end.
Tunnel fans are also called jet fans. Since tunnels and underground railways are tens of meters below the surface, natural wind is not enough at the entrances and exits of tunnels and underground railway stations. Tunnel fans must be installed to move and condition air or remove soot (smoke from cars passing through the tunnel). ,for the needs of staff and passengers. Tunnel fan (jet fan) is a special axial flow fan, mainly used in longitudinal ventilation systems of roads, railways, and subways. Generally hung on the top or both sides of the tunnel, it does not occupy the traffic area, does not require the construction of additional air ducts, and is low in cost. The fan is easy to install, easy to operate and maintain, and is a very economical ventilation method. When the tunnel fan (jet fan) is running, part of the air in the tunnel is sucked in from one end of the fan, accelerated by the impeller, and ejected from the other end of the fan at high speed. This part of the high-speed airflow with higher kinetic energy transfers energy to other gases in the tunnel and generates a pressure rise that overcomes the tunnel resistance, thus pushing the air in the tunnel to flow in the direction of the jet fan. When the flow velocity decreases to a certain level, the next group of fans continues to work. This achieves the purpose of sucking in fresh air from one end of the tunnel and exhausting dirty air from the other end.
