Sensitivity of puff characteristics to maximum-concentration-based definition of departure time
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00496764" target="_blank" >RIV/61388998:_____/18:00496764 - isvavai.cz</a>
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0950423018301499?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0950423018301499?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jlp.2018.09.007" target="_blank" >10.1016/j.jlp.2018.09.007</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Sensitivity of puff characteristics to maximum-concentration-based definition of departure time
Popis výsledku v původním jazyce
During a hazardous situation, its dangerousness has to be estimated. An important category of such situations is the one in which hazardous gas clouds are released into the atmosphere. The gas clouds are described by their characteristics at exposed locations. But their values are usually dependent on the parameters utilized in their definitions. Hence, the aim of this paper is to examine how a choice of a parameter value in a definition of departure time can affect its value. Moreover, it evaluates how this change influences other characteristics which utilize the departure time in their definitions. To study these situations, wind-tunnel experiments of short-duration gas leakages were conducted. The ground-level leakages of ethane were performed on a model of an idealized urban canopy. The model was composed of houses with pitched roofs organized into closed courtyards. Concentrations were measured by a fast flame ionisation detector. The experiments were repeated about 400 times at each measurement position to get statistically representative datasets. In the analysis, two departure time definitions based on a detected maximum concentration with various parameters were utilized. Moreover, other derived puff characteristics were computed. The results showed that when a suitable range of parameters is used, the differences in mean departure times are significant. In contrast, some other characteristics which use puff departure times in their definitions (e.g. mean dosage) are usually not significantly different.
Název v anglickém jazyce
Sensitivity of puff characteristics to maximum-concentration-based definition of departure time
Popis výsledku anglicky
During a hazardous situation, its dangerousness has to be estimated. An important category of such situations is the one in which hazardous gas clouds are released into the atmosphere. The gas clouds are described by their characteristics at exposed locations. But their values are usually dependent on the parameters utilized in their definitions. Hence, the aim of this paper is to examine how a choice of a parameter value in a definition of departure time can affect its value. Moreover, it evaluates how this change influences other characteristics which utilize the departure time in their definitions. To study these situations, wind-tunnel experiments of short-duration gas leakages were conducted. The ground-level leakages of ethane were performed on a model of an idealized urban canopy. The model was composed of houses with pitched roofs organized into closed courtyards. Concentrations were measured by a fast flame ionisation detector. The experiments were repeated about 400 times at each measurement position to get statistically representative datasets. In the analysis, two departure time definitions based on a detected maximum concentration with various parameters were utilized. Moreover, other derived puff characteristics were computed. The results showed that when a suitable range of parameters is used, the differences in mean departure times are significant. In contrast, some other characteristics which use puff departure times in their definitions (e.g. mean dosage) are usually not significantly different.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10509 - Meteorology and atmospheric sciences
Návaznosti výsledku
Projekt
<a href="/cs/project/GA15-18964S" target="_blank" >GA15-18964S: Experimentální výzkum organizovaných struktur v turbulentní mezní vrstvě s vnější turbulencí</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Loss Prevention in the Process Industries
ISSN
0950-4230
e-ISSN
—
Svazek periodika
56
Číslo periodika v rámci svazku
November
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
12
Strana od-do
242-253
Kód UT WoS článku
000454378300024
EID výsledku v databázi Scopus
2-s2.0-85053813524