Size segregated emissions of particle-phase species from on-road motor vehicles were investigated in the Kaisermühlen Tunnel (Vienna, Austria) during April and May 2005. Emission factors were calculated from concentration differences between tunnel inside and tunnel outside samples, the distance between tunnel entrance and sampling location, the ventilation rate and the number of vehicles passi...

Model Predictive Control (MPC) is an advanced method of process control that has been in use in the process industry such as chemical plants and oil refineries since the 1980s. Model predictive controllers rely on dynamic models of the process, obtained by system identification. In this work a design approach for control of ventilation system in road tunnel by model predictive control algorithm...

The rational use of natural wind in extra-long tunnels for feedforward operation ventilation control can dramatically reduce tunnel costs. However, traditional calculation theory lacks a prediction function. This paper proposes three-stage method relying on the Yanglin Tunnel Yunnan, China based massive meteorological parameters provided by open-source national stations around tunnel, which mak...

With the development of underground transportation, in order to reduce impact on surrounding environment and traffic, Hejiaying subway island station adopts concealed excavation method. During construction process, considering method, tunnel layout, ventilation requirements, working face as a multi-conductor cave, more stringent requirements are put forward for tunnel. Through combination theor...

Ventilation duct serves as a potential target for bioterrorist attack. Understanding the dynamics of aerosolized harmful agents in the ventilation ducts provides the fundamentals for effective control and management, e.g., risk assessment. In this work, new models for predicting the concentration dynamics in the ventilation duct after a particle resuspension (representing the case that harmful ...

The Platform Screen Doors improve Indoor Air Quality (IAQ) in the subway station; however, and the air quality is degraded in the subway tunnel. CO2 concentration and indoor particulate matter value are high in the tunnel. The IAQ level in subway tunnel degrades by increasing the train movements. Air-curtain installation reduces dusts, particles and moving toxic smokes and permits traffic by ge...