This study was motivated by the lack of understanding smoke control effect on an ultra-wide tunnel fire, with different exhaust patterns (sidewall and top patterns) longitudinal air supply volume (0, 30%, 50%, 70%, 90%). A full-scale model constructed based FDS fire parameters were analyzed, such as spread distance smoke, layer height temperature at safe height. In addition, efficiency calculat...

After-treatment technologies are adopted in automobiles and ships to meet strict emission regulations, which increase exhaust back pressure. Furthermore, underwater exhaust systems are employed on board ships to save space, and reduce noise and pollution on working decks. However, water at exhaust outlet creates a flow resistance for the exhaust gases, which adds to the back pressure. High back...

Fire is one of mankind’s greatest discoveries but can also be a great source danger in accidents. any occupancy has the potential to cause harm its occupants and severe damage property. As solution smart fire detection system designed using GSM technology, smoke/Flame sensors, Arduino water sprinkler system, LCD display, buzzer,. A smoke sensor used detect from Flame sensor. In event The microc...

Experiments were carried out to evaluate the performance of a medium grade LHR diesel engine consisting of air gap insulated piston with 3-mm air gap, with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with different operating conditions of jatropha oil in crude from and biodiesel form with varied injection timing and injection pressure. Performance paramete...

The natural smoke exhaust system for tall spaces is more advantageous than the mechanical type of exhaust. In Taiwan, the effectiveness of natural smoke exhaust systems is inspected only by checking the vent area size. However, the air flow field in a tall space is very complicated, both at ordinary times or during fires. This study used Schlieren Photography technique, on the principle that li...

In this paper, firstly, the parameters of tunnel fire model are set up, is established, reasonable grid divided, and appropriate power selected. Secondly, data exhaust mode, layout position, wind speed outlet lateral system selected reasonably. Finally, by using FDS simulation software, motion, visibility, smoke spreading distance temperature simulated changing number vents opened in under same...

Occupational health of traffic policemen employed at six major towns of north India was monitored during these investigations. Traffic controllers face the risk of exposure to benzene present in the ambient air as a component of fuel exhaust. Inhaled benzene is metabolized and excreted as phenol. Our observations on urinary phenol show much higher values than prescribed by ACGIH. Furthermore, s...

Investigations were carried out to study the exhaust emissions from high grade low heat rejection (LHR) diesel engine consisting of air gap insulated piston with 3-mm air gap with superni (an alloy of nickel) crown, air gap insulated liner with superni insert and ceramic coated cylinder head with normal temperature condition of crude jatropha oil and carbureted alcohol (ethanol / methanol) with...

In the past few years, there have been an increasing number of Impulse Systems installed in car parks, especially in Northern Europe. Unfortunately, no design method has been described openly in the public domain. This places Authorities Having Jurisdiction (AHJs, or Approving Authorities) in a difficult position when faced with a proposal. The present paper is intended to develop calculation p...