热泵与动力热管复合的深井热害控制试验研究

随着矿井开采深度的日趋增加,井下高温热害越来越严重,现阶段应用于矿井中的降温措施主要有非机械式制冷技术和机械式制冷技术,部分方法简单易操作但是降温效果不佳,部分方法降温效果良好但是受地势影响较大且安装成本高。提出并研究了高效制冷和远距离传热的热泵与动力热管复合系统。通过搭建试验平台,模拟井下工作环境,在不同热管长度条件下进行试验和测量,研究了不同长度对系统换热性能的影响。结合实际情况,分析了热泵与动力型分离式热管复合系统用于井下降温时在设计上和性能上的优势,明确了该系统在矿井中应用的可行性。研究表明:系统换热量随着蒸发段温度的升高或冷凝段温度的降低而增加;系统驱动温差越大,换热效率越高,同时所提出的试验系统可以在驱动温差为0或者蒸发段温度低于冷凝段温度时正常使用;工质循环动力泵流量增大,系统换热量先增大后保持不变,系统管路越长到达稳定值需要的动力泵流量越大,管路沿程损失对系统性能有一定的影响。

Experimental Study on Deep Mine Geothermal Hazard Control Based on Heat Pump and Power Heat Pipe

With the increasing depth of mine exploitation,the high temperature heat damage in the underground is becoming more and more serious.At present,the cooling measures applied in mines mainly include non-mechanical refrigeration technology and mechanical refrigeration technology.Some are simple and easy to operate,but the cooling effect is not good.Some cooling effects are good but they are affected by the terrain and the installation cost is high.Therefore,the heat pump and powered separated heat pipe composite system capable of high efficiency cooling and long-distance heat transfer is proposed and studied.After setting up an experimental platform to simulate a working environment in mine. Data measurement was carried out to study the effects of different lengths on the heat transfer performance of the system under different conditions.Combined with the actual situation,the advantages of design and performance of the heat pump and powered separated heat pipe composite system for mine cooling were analyzed,and the feasibility of the system in the mine was specified. The study results show that:the heat transfer of the system increases with the increase of the evaporation section temperature or the decrease of the condensation section temperature.The larger the driving temperature difference of the system,the higher the heat transfer efficiency.At the same time,the experimental system can be used normally when the driving temperature difference is 0 or the evaporation section temperature is lower than the condensation section temperature.When the flow of the working fluid circulating power pump increases,the heat transfer of the system increases first and then remains unchanged.The longer the system pipeline reaches the stable value,the larger the power pump flow is.The loss along the pipeline has a certain impact on the system performance.