tunnel Axial Flow Fan - HUMIDIN · Tunnel fans are an axial flow fans and moves an airstream along...
Transcript of tunnel Axial Flow Fan - HUMIDIN · Tunnel fans are an axial flow fans and moves an airstream along...
Tunnel fans are an axial flow fans and moves an airstream along the axis of the fan. The air is pressurized
by the aerodynamic lift generated by the fan blades, made like a propeller or an airplane wing. These
fans are used as the ventilation systems in a tunnel for the comfort an safety of the passengers.
TUNNEL AXIAL FLOW FAN
Stall Free Operation
Corrosion Resistant
Stable Operation
High Blade Strength
High Performance
Low Sound
Non Overloading Characteristics
Suitable for High Pressure Range
Aerofoil Blades with higher Lift Coeficient
Performance flexibility with adjustable blades
Certified for 250 C for two hours operation
100% X-Rayed impellers
Dynamically balanced at grade of G2.5
Compatible with variable frequency drives
Die Cast aluminium hub and blades
Rugged Construction with spun flang
Uni/Reversible Design Available
Easy installation of impellers with taper lock bush inside the hub
Road Tunnel Ventilation
Metro Tunnel Ventilation
Ventilation for Tunnel Under Constructions
Construction/Utility sites
APPLICATIONS
Features:
Ventilation for Tunnels under Construction
Tunnels under construction are usually at a risk of having atmospheric contaminants, fumes & other
pollutants produced during the various activities in the tunnels, requires mechanical ventilation to
ensure that sufficient oxygen is available for respiration and to dilute other atmospheric
contaminants.
Products offered by Humidin:
Humidin manufactures heavy duty design of single/ multistage fans to attain high pressure and
large air volumes. The impellers are adjustable for variable pitch for wide performance ranges.
Fan Range- 450-2000mm
Air Volume – Max 200,000CMH
Pressure Ranges – 4500Pa
Impellers- Aerodynamically designed with guide vanes
Compatible with VFD
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APPLICATIONS
Ventilation for Metro and Road Tunnels
Generally, three approaches have been used in the design of vehicular tunnel ventilation system, viz.
longitudinal, semi transverse and full transverse ventilation system.
Longitudinal Ventilation System
Longitudinal Ventilation can be achieved by using Jet Fans mounted at the tunnel ceiling. For Jet
Fans systems, the fans deliver air flow at a very high velocity and can create a momentum that will
entrain the surrounding air to move in a desired air flow direction.
Semi Transverse Ventilation System
Semi Transverse Ventilation system either supplies outdoor air or extracts exhaust air uniformly
over the full length of the tunnel. Therefore, it always requires a supply air duct or an exhaust air
duct running along the tunnel. In a fire emergency situation, the semi transverse supply system will
operate in a reverse mode. Smoke will be captured over the length of the tunnel, with outdoor air
entering the tunnel through the portals or adjacent air intake shafts. The aim is to maintain a smoke
clear layer for passenger/vehicle evacuation.
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APPLICATIONS
CFD SIMULATION
Full Transverse Ventilation System
Full Transverse Ventilation System supplies outdoor air and extracts exhaust air uniformly over the
full length of a tunnel. Therefore, a supply air duct and an exhaust air duct running along the tunnel
are always required. With the Full Transverse Ventilation System, the pollutant level as well as the air
velocity in the tunnel are relatively uniform. The Full Transverse Ventilation System attempts to
control smoke and hot gases by extracting the smoke through the exhaust openings along the
ceiling. The design aims at maintaining a smoke free layer for passenger evacuation.
HUMIDIN offers advanced and cost effective solutions to design and verification of Tunnel Ventilation
Systems using different tools like Subway Environmental Simulation (SES) program, Computational
Fluid Dynamics (CFD) tools were used to analyze the local effects of the design.
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