Experimental study on fire characteristics in cable compartment of utility tunnel with natural ventilation

The fire characteristics under natural ventilation in the cable compartment of the utility tunnel are studied. A series of small-scale fire experimental tests are conducted to obtain the maximum temperature below the ceiling of different ignition vertical heights and cable types. In this paper, the...

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Bibliographic Details
Published in:PloS one 2022-04, Vol.17 (4), p.e0266773-e0266773
Main Authors: Bai, Z P, Yao, H W, Zhang, H H
Format: Article
Language:English
Subjects:
Biology and Life Sciences
Cables
Ceilings
Design and construction
Ecology and Environmental Sciences
Electrosurgery
Engineering and Technology
Environmental aspects
Fire prevention
Fire protection
Fire safety
Heat
Heat release rate
Heat transfer
Hot Temperature
Maximum temperatures
Medicine and Health Sciences
Methods
Physical Sciences
Research and Analysis Methods
Scale models
Simulation
Temperature
Tunnels
Underground cables
Velocity
Ventilation
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Summary:The fire characteristics under natural ventilation in the cable compartment of the utility tunnel are studied. A series of small-scale fire experimental tests are conducted to obtain the maximum temperature below the ceiling of different ignition vertical heights and cable types. In this paper, the ceiling temperature decay and heat release rate (HRR) are studied in the cable compartment of utility tunnel. Through experimental tests, the fire characteristics of placing the fire source on the near wall side 3.0 m away from the shaft of the utility tunnel cable compartment are studied. The results showed that under the action of natural ventilation, with the decrease of fuel quantity, the mass loss of cable decreases, and the maximum temperature below the ceiling of the cable compartment in the utility tunnel decreases. ZRYJV cables burn more sufficient combustion than RVVR cables. A new empirical association for total HRR is proposed. Those experimental test results are used as validation data for the newly proposed empirical correlation of total HRR. This paper hopes to provide some basic fire safety references for the utility tunnel planning of the urban underground cable compartment.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0266773