نتایج جستجو برای: exhaust smoke
تعداد نتایج: 82808 فیلتر نتایج به سال:
The smoke and air flow through a horizontal opening was investigated using model-scale room equipped with on the ceiling. A layer created under ceiling small gas burner. pressure difference across changed by controlling supply to exhaust from space above opening. Smoke patterns were either downward uni-directional of air, bi-directional or upward. By changing opening, critical differences cause...
Abstract Based on an actual project in Beijing, this article investigates the effect of smoke control strategies extraction efficiency under different fire source locations point system extra-long tunnels using Airpak software. The results show that when a occurs tunnel, tunnel varies greatly depending location and adoption strategies. Due to suction exhaust shaft fan, relative distance between...
When there are traffic jams in the tunnel, if critical velocity is used for longitudinal smoke exhaust, it will pose a threat to vehicles and people congested downstream. Using FDS + EVAC numerical simulation, this paper has studied fire control strategies transverse passageway intervals. The results show that: (1) congestion at downstream of source, excessive exhaust reduce available safe evac...
Dimethyl Ether (DME) has been attracting attention as an alternative fuel for diesel engines because it can be produced from various feed stocks and does not create smoke. On the other hand, a DME truck require a large volume fuel tank in order to obtain the running distance equivalent to diesel trucks due to the lower energy content per unit volume of DME, and un-burned gas and fuel consumptio...
The contribution of motorized traffic to air pollution is widely recognized, but relatively few studies have looked at the respiratory health status of subjects living near busy roads. We studied children in six areas located near major motorways in the Netherlands. We measured lung function in the children, and we assessed their exposure to traffic-related air pollution using separate traffic ...
–Fast depletion of fossil fuels demands an urgent need to carryout research to find viable alternative fuels such as Hydrogen, LPG and CNG. The gaseous hydrocarbons seem to be best immediate option presently available[1]. The remarkable feature of gaseous fuels are the absence of mineral impurities, the consistency in quality and the convenience and efficient in use. LPG is used widely as a co-...
BACKGROUND AND PURPOSE Little research has been conducted into risk factors of atherosclerosis development in young women. METHODS This cross-sectional study enrolled 205 18- to 22-year-old female students from the Educational Centre for Allied Health Professions. A broad array of risk conditions and lifestyle behaviors was carefully assessed. Intima media thickness (IMT) was used as a well-e...
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