Underground road tunnel : air quality and associated environmental/health impact

• Main Author: Poh, Chun Sen
• Other Authors: Chang Wei-Chung
• Format: Final Year Project
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering
• Online Access: http://hdl.handle.net/10356/60015
• Institution: Nanyang Technological University

Due to the increasing population of Singapore as well as the transport vehicles, more roads will be built to keep up with the increasing demand. With the limited land space of Singapore, most of these roads will be built underground as road tunnel. Due to the enclosed space of the tunnel, the air quality inside the tunnel is usually at a lower quality than the open roads. The ventilation building installed controls the air qualities of the tunnel. Temperature is one of the important air qualities that are monitored closely by the sensor installed in the tunnel. Temperature affect human in many ways that includes affecting human concentration level, causes dizziness and causes smog in tunnel that affect visions. Temperatures are directly affected by the amount and composition of the vehicle fleet. Temperatures are affected by the heat flux from the vehicle surface as well as the vehicle exhaust gas temperature. Hence this report focuses on these two point sources of heat flux from the vehicle. Experimental test run of different vehicles were carried out at different travelling speed to simulate the different hours of the day. The results were then use to construct an excel sheet which the composition of vehicles are changeable. The results will be compared to estimated results where vehicle will be installed with waste heat recovery system.