Improved Assessment of Fire Spread over Horizontal Cable Trays Supported by Video Fire Analysis

Zavaleta, Pascal; Hanouzet, Romain; Beji, Tarek

doi:10.1007/s10694-018-0788-x

Cited by 34 publications

(22 citation statements)

References 7 publications

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“…The sidewall contributes to promoting flame spread, mainly for the first two trays. It is worth noting that the flame spread velocities measured are consistent with amplitudes recommended for FLASHCAT -model for PVC (between 3 and 6 mm/s) 14 as well as those measured from a similar experiment (five trays with PVC cable), between 2 and 5 mm/s. 18 Another important variable is the fire HRRPUA for which an assessment is proposed based on the HRR and the burning area, both computed from measurements as detailed in the previous section.…”

Section: Effect Of a Sidewallsupporting

confidence: 84%

“…This cable had been used in previous studies for studying cable arrangements in 12 or ignition 13 as well as in the PRISME project. 6,14 The total cable mass represented 442.7 kg and the fraction of combustible matter was estimated at 20%. The combustible material was ignited by an 80 kW propane square sand burner located 0.2 m below the lowest tray and at the center of the tray.…”

Section: Fire Tests and Data Processingmentioning

confidence: 99%

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Experimental investigation of the effects of a sidewall and cable arrangement on a horizontal cable tray fire in an open atmosphere

2022

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The work deals with the influence of a sidewall and cable arrangement on the behavior of a fire involving horizontal cable trays in the framework of fire safety assessments in nuclear installations. The analysis is based on large‐scale fire tests performed in the open atmosphere in the frame of the OECD Nuclear Energy Agency (NEA) PRISME 3 project and on the corresponding simulations applying the FLASHCAT model for predicting the fire heat release rate. The fire configuration consists of five horizontal trays filled with PVC‐insulated power cables. The parameters investigated are the presence or absence of a sidewall and the cable arrangement (loose or tight bundles). The results show that the presence of a sidewall increases the fire HRR in comparison to a scenario without a sidewall. This effect is due to the increase of the flame spread velocity on the lower trays. Regarding cable arrangement, a tight configuration in bundles reduces the fire HRR in comparison to a scenario with a loose arrangement. This result is due to the reduction of the fire heat release rate per unit of area (HRRPUA) as well as the flame spread velocity. The performance of the FLASHCAT model in predicting the effects of the sidewall and the cable arrangement was also assessed on the basis of the fire tests and satisfactory agreements are reported. The presented analysis demonstrates that the fire scenario with horizontal cable trays against a sidewall and with a loose cable arrangement represents a conservative scenario for fire risk assessment. In addition, on the basis of these experiments, the effect of cable arrangement is more substantial than the sidewall effect.

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Section: Effect Of a Sidewallsupporting

confidence: 84%

Section: Fire Tests and Data Processingmentioning

confidence: 99%

Experimental investigation of the effects of a sidewall and cable arrangement on a horizontal cable tray fire in an open atmosphere

2022

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“…Martinka et al 16 analyzed the influence of cable spacing distance and heat transfer performance of other components on fire development through cone calorimeter experiment. Zavaleta et al 17 designed a model to measure the heat release rate of multilayer cable in fire based on flash-cat.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on combustion characteristics of fire in data room

Gui

Xue

Jia

et al. 2022

Journal of Fire Sciences

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Through the combustion experiments on the cables and servers in a data room, the combustion characteristic parameters of the materials were obtained, and the materials were analyzed and evaluated from the aspects of heat release rate, gas concentration, flue gas temperature, and so on. The results show that network cable and electric cable can be ignited during the cable combustion test. In the overall fire combustion experiment of single server and the server group with three cabinets, the fire process is divided into three stages: initial growth stage, stable combustion stage, and combustion attenuation stage. The heat release rate, flue gas temperature, and CO2 concentration of the overall experiment have three peaks, respectively, 58, 98, and 134 kW; 100°C, 152°C, and 232°C; 1314, 2514, and 2988 ppm. The research results can provide some reference for design of fire protection system in data rooms.

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“…Electrical cables make up the largest amount of combustible material present in Nuclear Power Plants (NPPs) and therefore contribute significantly to fire hazard in such facilities [1]. In order to assess this hazard, cable flammability has been extensively studied for a long time.…”

Section: Introductionmentioning

confidence: 99%

Ignition and Charring of PVC-Based Electric Cables

Meinier

Fellah

Sonnier³

et al. 2021

Fire Technol

Self Cite

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The ignition of four different PVC-based electric cables was studied using cone calorimeter and the influence of the charring phenomenon on ignition was investigated. The thermophysical and optical properties of the sheaths before decomposition were measured. The kinetics of charring was studied by photogrammetry. It was shown that charring occurs for three cables before ignition at heat flux lower than 45 kW/m 2 . The lower is the heat flux, the higher is the char amount at ignition. In spite of the char formation, it was observed that the time-to-ignition of the cables can be properly calculated using the well-known Quintiere's equation, considering an apparent temperature of ignition. This apparent temperature at ignition was found in the range 312°C to 349°C for the four electric cables.

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Improved Assessment of Fire Spread over Horizontal Cable Trays Supported by Video Fire Analysis

Cited by 34 publications

References 7 publications

Experimental investigation of the effects of a sidewall and cable arrangement on a horizontal cable tray fire in an open atmosphere

Experimental investigation of the effects of a sidewall and cable arrangement on a horizontal cable tray fire in an open atmosphere

Experimental study on combustion characteristics of fire in data room

Ignition and Charring of PVC-Based Electric Cables

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