The metro depot area has the characteristics of large and high storey smoke diffusion under fire conditions in these areas are more complicated. It is important to investigated exhaust effect which closely related safety firefighters. FDS (Fire Dynamics Simulator) numerical simulation method was adopted investigate influence draft curtain height on performance fan were installed inside wall are...

Natural ventilation (NV) is an effective energy-saving strategy to remove the excessive heat in high-rise atria. The traditional NV system atria has inlet openings at bottom and outlet top. However, this may bring fire safety concerns due rapid spread of smoke during atrium fire. To concern, a new was proposed study. This applies segmentation slab divide into upper lower parts, which can limit ...

The aims of the study were to evaluate the front-door concentration of traffic exhaust fumes as a surrogate for the personal exposure of children and to study factors in the behavior and the environment of children that affect their personal exposure to nitrogen dioxide (NO(2)). The exposure to NO(2) of 103 children living in Copenhagen and 101 children living in rural areas of Denmark was stud...

The influences of the slope composition on both sides variable point and opening numbers exhaust vent smoke diffusion heat efficiency in V-shaped tunnel were investigated by numerical method. results showed that for asymmetric tunnel, increasing number vents large side can improve efficiency, but control a smaller rang is relatively difficult. corresponding strategy should be drawn up accordanc...

In this study, three full-scale experiments and a series of numerical simulations were conducted to investigate the influence subway platform height atrium ceiling stations on smoke control by mechanical exhausting systems. The temperature variation with time, maximum distribution, stratification discussed. Results showed that had capacity store smoke, especially at early stage spread. However,...

age of cases is diagnosis made early enough for surgery to be curative. The survey results here presented represent a limited effort at a separate evaluation of the major factors most closely asso ciated with the disease incidence and indicate the likelihood of a contributing role for motor exhaust fumes. The finger of suspicion has now been pointed at three types of pollution: cigarette smoke,...

The risk of lung cancer associated with diesel exhaust has been calculated from 14 case-control or cohort studies. We evaluated the findings from these studies to determine whether there is sufficient evidence to implicate diesel exhaust as a human lung carcinogen. Four studies found increased risks associated with long-term exposure, although two of the four studies were based on the same coho...

Fires involving a large number of casualties in elderly nursing homes China recent years are described. The fire safety codes and standards for Japan overviewed, comparisons were made specific model buildings. According to the comparative analysis, understanding differences between two countries was possible. In China, protection buildings, such as compartments can meet Japan. But report appara...

The design of marine gas turbine exhaust system is related to the normal operation and even overall performance indexes ship. In this paper, influence on turbine, infrared stealth whole ship surface equipment specifically analyzed. view these influences, main points are presented in which can provide reference for system. Design includes: (1) resistance, (2) cooling air injection effect case bo...

BACKGROUND Biomass smoke is an important source of particulate matter (PM), and much remains to be discovered with respect to the human health effects associated with this specific PM source. Exposure to biomass smoke can occur in one of two main categories: short-term exposures consist of periodic, seasonal exposures typified by communities near forest fires or intentional agricultural burning...