Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: bariera aktywna

Sortuj według:

Ogranicz wyniki do:

Small-scale testing of coal dust explosion propagation and relation to active barrier suppression systems

Johnson Catherine, Rutter Barbara, Urban Christopher, Schott Joseph, Doucet David, Moore Chance, Perry Kyle

New Trends in Production Engineering

2019

Vol. 2, Iss. 1

321--329

Coal dust explosions are a lethal threat to anyone working in an underground coal mine. Many coal mining countries including Australia and much of Europe already utilize passive barrier explosion suppressant systems but due to differences in ventilation patterns in the United States, simple passive systems such as the bagged barrier are not as cost effective. Active systems are triggered by properties of an explosion, such as pressure, heat, or light, and release or project a suppressant into the environment to suppress an explosion. To deploy an active system, the best sensor and suppressant release location and spacing must be determined; this must account for total system latency and explosive propagation speed. A 10:1 model of a longwall entry system has been developed to study the pressure wave propagation of coal dust explosions and consequent triggering of different suppressants. The scaled model, with its removable stoppings, allows multiple potential propagation pathways for an explosion to be repeatedly tested, different from typical straight shock tunnel tests. The layout also facilitates the placement of sensors and cameras to fully observe and document the tests. The pressure wave characteristics found at crosscuts and corners will aid in the development of active barrier trigger systems and spacing of suppressant release locations.

Migracja strumienia zanieczyszczeń przez obszar bariery aktywnej

Adach A., Wroński S., Łączny J. M., Iwaszenko S.

Inżynieria i Aparatura Chemiczna

2006

Nr 5s

5-8

The model of the contaminants migration and its immobilisation on the active barrier was presented together with boundary conditions. The division of the system into 2 horizontal layers (partially and fully saturated) and 3 vertical compartments (soil before the barrier, barrier itself and soil after the barrier) was proposed. The values of the dimensionless Peclet and Fourier numbers indicate the diffusive-convective type of mass transfer mechanism.

Remediacja IN SITU starych składowisk odpadów za pomocą systemu szczelnej izolacji oraz bariery aktywnej

Suponik T.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

2000

z. 246

507-515

W referacie opisano metodę remediacji wód podziemnych za pomocą szczelnej izolacji i aktywnej bariery, przedstawiono warunki stosowania tej metody oraz problemy temu towarzyszące. W technologii szczelnej izolacji oraz bariery aktywnej zanieczyszczenia są usuwane bezpośrednio w warstwie wodonośnej przez przepływ skażonego strumienia wód podziemnych przez barierę aktywną.

A new technique of groundwater remediation called funnel and gate system is passive remediation, where contaminants are removed into aquifer by flow through reactive walls filled with reactive material. This paper presents this technique and describes conditions and problems which accompany it.