摘要
为研究多因素影响下重力热管的提热性能,采用正交实验方法研究工质种类、充液率,以及长径比等内在因素的综合效应,并对实验结果采用多指标权重与极差分析法进行分析,得出重力热管最佳提热性能的组合因素。结果表明:重力热管的使用能有效降低煤堆内部温度,抑制煤堆温度上升;重力热管的产冷量、有效影响半径与煤堆温度成正比;当煤堆温度为70℃左右时,各因素的较优水平组合:工质为Al_(2)O_(3),充液率为15%,长径比为25.0;当煤堆温度升至210℃时,各因素的较优水平组合:工质为Al_(2)O_(3),充液率为25%,长径比为25.0。
The orthogonal experiment method was used to investigate the heat transfer performance of the gravity heat pipe under the influence of multiple factors such as types of working fluid,filling rate,and the aspect ratio.The Multi-index weighting method and rescaled range analysis were introduced to analyze the experimental results to propose an appropriate combination scheme of factors for the best heat transfer performance of the gravity heat pipe.The results show that gravity heat pipe can effectively reduce the internal temperature of the coal pile,thereby inhibiting the increase of the temperature of the coal pile.Moreover,the cooling capacity and effective pore radius of gravity heat pipe are positively correlated with the temperature of the coal pile.Specifically,when the coal pile temperature is about 70℃,the most appropriate combination of various factors is as follows,the working fluid is Al_(2)O_(3)-water nanofluid,the liquid filling rate is 15%,and the aspect ratio is 25.0.When the temperature of the coal pile rose to 210℃,the most appropriate combination of each factor is as follows,the working fluid is Al_(2)O_(3)-water nanofluid,the liquid filling rate is 25%,and the aspect ratio is 25.0.
作者
马欣
谢容宇
孟曦
刘静雯
肖旸
芦星
MA Xin;XIE Rongyu;MENG Xi;LIU Jingwen;XIAO Yang;LU Xing(College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi’an 710054,China;Shaanxi Key Lab oratory of Prevention and Control of Coal Fire,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《煤矿安全》
CAS
北大核心
2022年第2期53-58,共6页
Safety in Coal Mines
基金
国家自然科学基金资助项目(52004210)
陕西省教育厅一般专项科学研究计划资助项目(20JK0763)。
关键词
煤自燃
重力热管
正交实验
多指标权重
极差分析法
coal spontaneous combustion
gravity heat pipe
orthogonal experiment
multi-index weighting method
rescaled range analysis
