Numerical Study of Protection Strategy by Using Mechanical Ventilation in Electric Cable Tunnel Fires

doi:10.11930/j.issn.1004-9649.2017.06.113.07

Electric Power ›› 2017, Vol. 50 ›› Issue (6): 113-119.DOI: 10.11930/j.issn.1004-9649.2017.06.113.07

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Numerical Study of Protection Strategy by Using Mechanical Ventilation in Electric Cable Tunnel Fires

ZHANG Jiaqing^{1, 2, 3}, FAN Minghao^{1, 2, 3}, LI Wei^{1, 2, 3}, WANG Liufang^{1, 2, 3}, WU Haicheng⁴, WANG Shuping^{1, 2, 3}

1. State Grid Anhui Electric Power Research Institute, Hefei 230601, China;
2. State Grid Labortaory of Fire Protection for Transmission and Distribution Facilities, Hefei 230022, China;
3. Anhui Province Key Laboratory of Electric Fire and Safety Protection, Hefei 230022, China;
4. Eastern China Branch, China Datang Corporation Science and Technology Research Institute Co., Ltd, Hefei 230031, China

Received:2017-02-20 Online:2017-06-20 Published:2017-07-12
Supported by:
; This work is supported by Science and Technology Planning Project of Anhui Province(No. 1206c0805036); Anhui Provincial Natural Science Foundation(No. 1408085MKL94); Science and Technology Project of SGCC (No. 52120515005H, 52120016036X).

Abstract

Abstract: The large eddy simulation was adopted in this study, to inveterate the protection strategy by using mechanical ventilation in electric cable tunnel fires. The results indicated that appropriate longitudinal ventilation could return the fire environment of ventilated side of the tunnel to the initial level, to make it suitable for firefighters to enter the scene to put out the fire. A transverse tunnel ventilation is conducive to decrease the overall tunnel fire risk greatly, and is suitable for protection of tunnel structure and equipment, when the firefighters could not reach the fire. In addition, it was found that the effects of tunnel longitudinal ventilation on the protection of tunnels in lower ventilation conditions were limited, and even exacerbate the fire risk of the tunnel. The transverse ventilation in larger exhaust air velocity conditions may cause smoke aspiration, and resulted in combustion instability.

Key words: electric cable, tunnel, fire simulation, mechanical ventilation, safety protection

CLC Number:

TM63

ZHANG Jiaqing, FAN Minghao, LI Wei, WANG Liufang, WU Haicheng, WANG Shuping. Numerical Study of Protection Strategy by Using Mechanical Ventilation in Electric Cable Tunnel Fires[J]. Electric Power, 2017, 50(6): 113-119.

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Numerical Study of Protection Strategy by Using Mechanical Ventilation in Electric Cable Tunnel Fires

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