Differences between Tunnel Jet Fan and Tunnel Ventilation Fan

Tunnel Jet Fan and Tunnel Ventilation Fan are two different types of axial flow fans used for different purposes during tunnel operations and construction. They have distinct features and functionalities.

Stage of Use:

Tunnel Jet Fan: This type of fan is primarily used in operational tunnels and is crucial for emergency situations such as fire incidents. Tunnel Jet Fans are installed along the tunnel walls or ceilings to provide smoke extraction, ventilation, and maintain safe evacuation routes. They are designed to meet stringent fire safety requirements, with a minimum fire resistance rating of F300, meaning they can withstand a temperature of 400°C for at least 120 minutes. These fans are essential for ensuring visibility and facilitating the safe evacuation of people during fire emergencies.

Tunnel Ventilation Fan: Tunnel Ventilation Fans, on the other hand, are primarily used during the tunnel construction phase. They are installed on tunnel excavation machinery or construction equipment to assist in the ventilation and air circulation during tunnel excavation. Tunnel Ventilation Fans help remove dust, exhaust gases, and maintain a healthy working environment for the construction personnel. While they are not specifically designed for fire incidents, they still play a crucial role in maintaining air quality and worker comfort during the construction process.

Design and Features:

Tunnel Jet Fan: Tunnel Jet Fans are designed to meet fire safety standards and have specific features to address emergency situations. They are equipped with fire-resistant materials, including flame-retardant casing, blades, and motors, which ensure their performance and structural integrity in high-temperature environments. Additionally, these fans are designed to operate reliably for at least 120 minutes at temperatures up to 300°C, providing sufficient time for evacuation and firefighting operations.

Tunnel Ventilation Fan: Tunnel Ventilation Fans are designed to meet the ventilation requirements during tunnel excavation and construction. They are equipped with powerful motors and aerodynamically designed blades to move a large volume of air efficiently. These fans are often designed to withstand demanding conditions such as dust and debris present during the construction process. They also incorporate safety features like motor overload protection and vibration dampening systems to ensure reliable and safe operation.

Tunnel Jet Fans and Tunnel Ventilation Fans have distinct purposes and features. Tunnel Jet Fans are specifically designed for emergency situations, with fire-resistant materials, high-temperature resistance, and fire safety ratings. They play a crucial role in smoke extraction and maintaining safe evacuation routes during fire incidents. Tunnel Ventilation Fans, on the other hand, are primarily used for ventilation during tunnel construction and ensure a healthy working environment for construction personnel. Understanding the specific requirements and features of these fans is essential for ensuring safety and efficiency in tunnel operations and construction projects.