高温矿井局部环境降温技术研究

发布时间：2018-03-11 18:47

  本文选题：局部热害　切入点：热舒适性　出处：《山东科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着科学技术的发展和采掘机械化水平的不断提高,我国矿井高温热害问题日益严重。由于整体降温系统具有能耗高,冷损大,降温效果不理想等问题,很难解决井下没有纳入整体降温系统的局部高温作业场所热害问题,因此,研究一种适应于井下局部高温作业场所的降温技术成为一个亟需解决的课题。本文针对矿井局部高温热害存在的问题,从矿井高温作业场所热害形成机理与主要热湿源分析入手,采用理论计算、实验测试、软件模拟相结合的方法对局部降温技术进行了分析研究。本文通过对现有局部降温技术方案的分析与对比,在前人局部降温技术的基础上设计了一种自动控制移动降温室,对降温室的形状、结构及材料进行了分析,针对降温室设计了一种新型空气压缩制冷装置,根据局部空间需冷量选择了适合的制冷器,通过红外线传感器、温度传感器、电磁阀等对移动降温室实现了自动化控制。通过实验分析了在不同进风温度和速度情况下降温室内温度变化规律,实验结果显示降温室平均温降5～6℃,降温效果较理想。建立降温室三维模型,运用fluent软件对降温室内温度分布规律进行了模拟验证,模拟结果与实验数据大体一致,显示降温室具有较好的降温效果。对降温室进行人体热舒适性评价指标(PMV-PPD)模拟,模拟显示降温室内-1PMV1,PPD≤15,人体热舒适性评价指标良好。针对气冷式降温服和相变降温服各自的优缺点,设计了一种新型降温服系统,包括压缩气源供应点系统设计,气冷式降温服和冷柜设计。将气冷式降温服和相变降温服合二为一,既解决了气冷式降温服作业半径小的问题,又解决了相变降温服降温持续时间短的难题。以上研究内容对于矿井局部高温作业场所热害治理具有一定的借鉴意义,是目前矿井局部热害治理的一种可供选择的方式。
[Abstract]:With the development of science and technology and the continuous improvement of the level of mining mechanization, the problem of high temperature thermal damage in mine is becoming more and more serious in our country. Because the whole cooling system has the problems of high energy consumption, large cold loss and unsatisfactory cooling effect, etc. It is very difficult to solve the problem of heat damage in the local high temperature working place which is not included in the whole cooling system. It has become an urgent task to study a cooling technology suitable for local high temperature underground working places. This paper aims at the existing problems of local high temperature thermal damage in coal mines. Starting with the analysis of the formation mechanism of thermal damage and the main heat and humidity sources in the high temperature working place of mine, the theoretical calculation and experimental test are adopted. Based on the analysis and comparison of the existing local cooling technology, an automatic control moving cooling chamber is designed on the basis of the previous local cooling technology. The shape, structure and material of the cooling chamber are analyzed. A new type of air compression refrigeration device is designed for the cooling chamber. According to the cooling capacity of local space, the suitable cooler is selected, and the infrared sensor and temperature sensor are adopted. The solenoid valve has realized the automatic control to the moving cooling chamber. Through the experiment, the variation law of the temperature in the cooling chamber under different inlet air temperature and velocity is analyzed. The experimental results show that the average temperature drop of the cooling chamber is 5 ~ 6 鈩，

本文编号：1599445