نتایج جستجو برای: tunnel ventilation
تعداد نتایج: 82806 فیلتر نتایج به سال:
Unlike many other engineering products, where a prototype model is built, tested and modified, buildings can only be examined after they are built. It is then too late to correct any design mistake. Therefore, architects depend on scaled models to simulate as close as possible the final product and test the design. The currently available approach for students as well as professionals to simula...
The distribution characteristics of the temperature below ceilings in curved tunnel fires have not been quantitatively studied. A small-scale was constructed this work to study maximum and longitudinal attenuation induced by a with natural ventilation. Different turning radiuses fire heat release rates were taken into account. results show that ceiling is hardly affected radius scenario where f...
Hydrogen is widely regarded as a key element of prospective energy solutions for alleviating environmental emission problems. However, hydrogen classified high-risk gas because its wide explosive range, high overpressure, low ignition energy, and fast flame propagation speed compared with those hydrocarbon-based gases. In addition, deflagration can develop into detonation in ventilation or expl...
The paper deals with the possibility of installing a double-circuit Gas Insulated transmission Line (GIL) in the pilot tunnel of the new planned railway galleries Fortezza-Innsbruck. The high GIL power ratings with very low power losses would allow a strong and highly efficient energy exchange particularly useful for the future European Market and could represent a new fundamental step in recon...
This paper studied the effects of ambient pressure on plug-holing phenomenon in tunnel fires with a shaft by Fire Dynamics Simulator. The influence pressures smoke movement, temperature distribution, critical Richard number (Ric) and height for were analyzed detail. A new prediction formula flow velocity considering different was modified. distribution beneath ceiling under developed. As result...
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