Liquefied extinguishing agent discharge to an overpressure-sensitive enclosed volume

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43953555" target="_blank" >RIV/49777513:23640/18:43953555 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/matecconf/201816807010" target="_blank" >http://dx.doi.org/10.1051/matecconf/201816807010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/matecconf/201816807010" target="_blank" >10.1051/matecconf/201816807010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Liquefied extinguishing agent discharge to an overpressure-sensitive enclosed volume

Popis výsledku v původním jazyce

The throttling of liquefied substances from high pressure vessels to an enclosed volume starting at atmospheric pressure is described in order to determine thermodynamic state of the extinguished room gaseous contents. Time dependent, 0D mathematical model is implemented describing the state inside the agent container, the isenthalpic throttling in the distribution system, agent vaporization and mixing with air. The agent is modelled as real gas. Other influences on the process including the heat transfer from selected solid parts inside the room and the gas mixture leakage out of the room are taken into account. Main outcome is an MS Excel tool for integrated fire extinguishers design optimization. The optimization balances the two contradictory requirements: Agent volumetric concentration to sustain the fire extinguishing capabilities and tolerable room overpressure. Agent fill weight and discharge time are being adjusted. The discharge time is controlled by the distribution piping and spray nozzles design. System operation is checked concerning various initial and boundary conditions.

Název v anglickém jazyce

Liquefied extinguishing agent discharge to an overpressure-sensitive enclosed volume

Popis výsledku anglicky

The throttling of liquefied substances from high pressure vessels to an enclosed volume starting at atmospheric pressure is described in order to determine thermodynamic state of the extinguished room gaseous contents. Time dependent, 0D mathematical model is implemented describing the state inside the agent container, the isenthalpic throttling in the distribution system, agent vaporization and mixing with air. The agent is modelled as real gas. Other influences on the process including the heat transfer from selected solid parts inside the room and the gas mixture leakage out of the room are taken into account. Main outcome is an MS Excel tool for integrated fire extinguishers design optimization. The optimization balances the two contradictory requirements: Agent volumetric concentration to sustain the fire extinguishing capabilities and tolerable room overpressure. Agent fill weight and discharge time are being adjusted. The discharge time is controlled by the distribution piping and spray nozzles design. System operation is checked concerning various initial and boundary conditions.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

MATEC Web of Conferences

ISBN

—

ISSN

2261-236X

e-ISSN

neuvedeno

Počet stran výsledku

7

Strana od-do

"NESTRÁNKOVÁNO"

Název nakladatele

EDP Sciences

Místo vydání

Žilina

Místo konání akce

Rajecké Teplice

Datum konání akce

25. 4. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000454319000046