变压器油沸溢池火温度特征及传热模型试验研究*

doi:10.16265/j.cnki.issn 1003-3033.2021.11.015

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (11): 106-113.doi: 10.16265/j.cnki.issn 1003-3033.2021.11.015

变压器油沸溢池火温度特征及传热模型试验研究^*

张佳庆¹ 高级工程师, 尚峰举¹, 何旭², 杨寒冰², 孔得朋² 副教授

1 国网安徽省电力有限公司电力科学研究院电力火灾与安全防护安徽省重点实验室(国家电网公司输变电设施火灾防护实验室),安徽合肥 230601;
2 中国石油大学(华东) 机电工程学院,山东青岛 266580

收稿日期:2021-08-14 修回日期:2021-10-15 出版日期:2021-11-28 发布日期:2022-05-28
作者简介:张佳庆 (1987—),男,安徽安庆人,博士,高级工程师,主要从事电力安全防护技术方面的工作。E-mail:dkyzjq@163.com。
基金资助:
国网安徽省电力有限公司科技项目(521205190020)。

Study on temperature characteristics and heat transfer model of boilover in transformer oil pool fires

ZHANG Jiaqing¹, SHANG Fengju¹, HE Xu², YANG Hanbing², KONG Depeng²

1 State Grid Anhui Electric Power Research Institute, Anhui Province Key Laboratory of Electric Fire and Safety Protection (State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities), Hefei Anhui 230601, China;
2 College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao Shandong 266580, China

Received:2021-08-14 Revised:2021-10-15 Online:2021-11-28 Published:2022-05-28

摘要/Abstract

摘要： 为预测垫水层变压器油池火沸溢发生时间,开展以K150X变压器油为燃料的小尺度垫水层沸溢油池火试验,测量不同初始油层厚度和油池直径下油池轴线不同高度处的温度数据,分析燃烧过程中油层内部的温度分布特征,进而构建垫水油层内部一维单层传热模型,并预测垫水层变压器油池火的沸溢发生时间。结果表明:变压器油沸溢池火燃烧过程的温度变化具有阶段性特征,且油水界面处出现过热现象是发生沸溢的决定性因素;油层竖直方向一维单层传热模型能够较好地拟合试验测量值;基于传热模型提出垫水层变压器油池火的沸溢发生时间预测模型。

关键词: 变压器油, 池火沸溢, 温度分布特征, 传热模型, 无量纲温度

Abstract: In order to predict boilover's onset time of transformer oil pool fires with water sublayer, a series of small-scale experiments were carried out with K150X transformer oil as fuel. Temperature data at different heights of oil pool axis under different initial oil layer thicknesses and oil pool diameters were measured, and temperature distribution characteristics inside transformer oil layers during burning process were analyzed. Finally, a one-dimensional single-layer heat transfer model of oil-water layer was established, and boilover's onset time was predicted. The results show that the temperature variation during burning process has phased characteristics, and overheating phenomenon at oil-water interface is the decisive factor for occurrence of boilover. Moreover, the proposed one-dimensional single-layer heat transfer model can fit measured values of this experiment well, and the prediction model for boilover's onset time is put forward based on the heat transfer model.

Key words: transformer oil, oil pool fire boilover, temperature distribution characteristics, heat transfer model, dimensionless temperature

中图分类号:

X934

张佳庆, 尚峰举, 何旭, 杨寒冰, 孔得朋. 变压器油沸溢池火温度特征及传热模型试验研究^*[J]. 中国安全科学学报, 2021, 31(11): 106-113.

ZHANG Jiaqing, SHANG Fengju, HE Xu, YANG Hanbing, KONG Depeng. Study on temperature characteristics and heat transfer model of boilover in transformer oil pool fires[J]. China Safety Science Journal, 2021, 31(11): 106-113.

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变压器油沸溢池火温度特征及传热模型试验研究^*

Study on temperature characteristics and heat transfer model of boilover in transformer oil pool fires

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