Analysis of the application case of gravity heat pipe return air heat exchange in asymmetric sections of coal mines
LI Qiang
YE Lei
HAO Kun
LIU Ming
YUE Xudong
WEI Shihao
HU Zhaokun
Abstract：In the design of the gravity heat pipe heat exchange system for mine intake and return air,due to the fact that the length ratio of the evaporation section to the condensation section is basically the same under various working conditions,it is difficult to meet the performance optimization requirements.Based on the idea of asymmetric segment ratio,a mathematical model of gravity heat pipe return air heat exchange is established,and field tests are conducted on the gravity heat pipe system of a certain coal mine in Shaanxi Province under extremely cold conditions.The results show that the relative errors between the predicted values and the measured values are all less than 6%.The flow rate has a significant impact on the heat transfer performance of the evaporation section and the condensation section.When the ratio of the evaporation/condensation section is optimized to 1.9∶2.6～2.1∶2.4,the best intake air heating effect and single-tube heat exchange capacity can be achieved.
Keywords：mine return airheat exchange capacitygravity heat pipeheat transfer characteristics
Publication Date：2026-01-31
Online Publishing Date：2026-03-11(First online date of this platform, not the publication date of the document)
Pages：4( 124-127 )