Ventilation and lighting design should not only consider normal traffic conditions, but also the fire conditions inside the tunnel.

Requirements for tunnel jet fan:

The custom for designing one-way traffic tunnels should be above 10m/s, and 12m/s may be used in special circumstances. The customs for the design of two-way traffic tunnels should be above 8m/s, and the customs for the design of mixed traffic tunnels should be above 7m/s.

The streamer operates normally for 60 minutes at an ambient temperature of 250 ℃.

Selection, Setting, and Control of Axial Flow Fans

1. Select air supply fan

2. Axial flow fan thermal resistance

The storage fan must be able to operate reliably for more than 60 minutes at an ambient temperature of 250 ℃.

The walls around the connection between the range hood and the air duct must be sealed and there must be no air leakage.

When a fire occurs, ventilation should be carried out through the main pipeline to half level and overall level. The forward and reverse rotation of the range hood should be vertically ventilated according to the location of the fire in the tunnel, and the smoke journey inside the vehicle should be minimized as much as possible.

Highway tunnels require continuous installation of lighting and power supply systems. Tunnel jet fan

Long tunnels on highways and other tunnels over 20000 meters in length need to be equipped with disaster prevention signs.

Maintaining good air quality during tunnel operation is a necessary condition for ensuring traffic safety. In order to effectively reduce the concentration of harmful gases and smoke, ensure the health of drivers, passengers, and employees, improve the safety and comfort of highway tunnel ventilation design, and ensure good tunnel ventilation, the ventilation design of Huangtuliang Tunnel mainly considers the following factors:

(1) The length, linearity, and total length of the right line of the Anzi Tunnel are 1227 meters, with high wind resistance and low natural air volume.

(2) Traffic volume: Ma'an Tunnel is a road tunnel with a large traffic volume of 2400 vehicles per hour, mainly consisting of medium-sized trucks and large buses.

(3) Abnormal situations such as traffic accidents and fires occur inside the tunnel.

(4) Tunnel engineering costs, maintenance costs, etc.

Tunnel ventilation should meet the following requirements:

(1) The design standard for one-way traffic tunnels should be above 10m/s. In special circumstances, the design convention for a 12 meter/s two-way traffic tunnel cannot be greater than the design convention for an 8 meter/s mixed traffic tunnel.

(2) The noise and exhaust gas generated by centralized exhaust range hoods in tunnels should comply with environmental protection regulations.

(3) When traffic conditions change, the correct ventilation method has high stability and meets the ventilation requirements under fire conditions.

(4) The main direction of tunnel operation cannot be changed frequently.

(5) Carbon monoxide allowable concentration tunnel jet fan.