本文選題：局部熱害　切入點：熱舒適性　出處：《山東科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著科學(xué)技術(shù)的發(fā)展和采掘機械化水平的不斷提高,我國礦井高溫?zé)岷栴}日益嚴重。由于整體降溫系統(tǒng)具有能耗高,冷損大,降溫效果不理想等問題,很難解決井下沒有納入整體降溫系統(tǒng)的局部高溫作業(yè)場所熱害問題,因此,研究一種適應(yīng)于井下局部高溫作業(yè)場所的降溫技術(shù)成為一個亟需解決的課題。本文針對礦井局部高溫?zé)岷Υ嬖诘膯栴},從礦井高溫作業(yè)場所熱害形成機理與主要熱濕源分析入手,采用理論計算、實驗測試、軟件模擬相結(jié)合的方法對局部降溫技術(shù)進行了分析研究。本文通過對現(xiàn)有局部降溫技術(shù)方案的分析與對比,在前人局部降溫技術(shù)的基礎(chǔ)上設(shè)計了一種自動控制移動降溫室,對降溫室的形狀、結(jié)構(gòu)及材料進行了分析,針對降溫室設(shè)計了一種新型空氣壓縮制冷裝置,根據(jù)局部空間需冷量選擇了適合的制冷器,通過紅外線傳感器、溫度傳感器、電磁閥等對移動降溫室實現(xiàn)了自動化控制。通過實驗分析了在不同進風(fēng)溫度和速度情況下降溫室內(nèi)溫度變化規(guī)律,實驗結(jié)果顯示降溫室平均溫降5～6℃,降溫效果較理想。建立降溫室三維模型,運用fluent軟件對降溫室內(nèi)溫度分布規(guī)律進行了模擬驗證,模擬結(jié)果與實驗數(shù)據(jù)大體一致,顯示降溫室具有較好的降溫效果。對降溫室進行人體熱舒適性評價指標(biāo)(PMV-PPD)模擬,模擬顯示降溫室內(nèi)-1PMV1,PPD≤15,人體熱舒適性評價指標(biāo)良好。針對氣冷式降溫服和相變降溫服各自的優(yōu)缺點,設(shè)計了一種新型降溫服系統(tǒng),包括壓縮氣源供應(yīng)點系統(tǒng)設(shè)計,氣冷式降溫服和冷柜設(shè)計。將氣冷式降溫服和相變降溫服合二為一,既解決了氣冷式降溫服作業(yè)半徑小的問題,又解決了相變降溫服降溫持續(xù)時間短的難題。以上研究內(nèi)容對于礦井局部高溫作業(yè)場所熱害治理具有一定的借鑒意義,是目前礦井局部熱害治理的一種可供選擇的方式。
[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，

本文編號：1599445