本文選題：礦井熱害 + 降溫服　； 參考：《河南理工大學(xué)》2014年碩士論文

【摘要】：隨著礦產(chǎn)資源的不斷開發(fā),礦井的深度開采成為必然趨勢。熱害已經(jīng)成為危害礦井安全生產(chǎn)的重大災(zāi)害之一。傳統(tǒng)的礦井熱害治理方法存在初投資大、運(yùn)行費(fèi)用高、在運(yùn)行過程中有噪聲污染和制冷效果不良,且隨著工作面的改變,制冷設(shè)備移動(dòng)、安裝非常困難及安全隱患等問題。同時(shí),作為高溫下個(gè)體防護(hù)設(shè)備的降溫服正逐漸興起。在開闊空間、大環(huán)境及一些特殊場合,降溫服具有不可比擬的優(yōu)勢�；谝陨戏治�,本課題對降溫服在礦井熱環(huán)境下應(yīng)用性進(jìn)行了相關(guān)探索,希望能對礦井熱害的治理提供有益參考。本文主要研究內(nèi)容和結(jié)論有以下四點(diǎn):1.針對當(dāng)前礦井熱害治理存在問題,提出應(yīng)用于礦井熱害治理的氣冷服個(gè)體防護(hù)方法。本文在總結(jié)當(dāng)前降溫服的應(yīng)用現(xiàn)狀的基礎(chǔ)上,對其在礦井熱環(huán)境中的應(yīng)用可行性進(jìn)行分析。2.基于生物熱力學(xué)、生物傳熱學(xué)原理,分析熱環(huán)境下人體微氣候降溫機(jī)理。結(jié)合微氣候人體降溫機(jī)理分析,進(jìn)行針對高溫?zé)岘h(huán)境下的氣冷服結(jié)構(gòu)設(shè)計(jì),確定氣冷服的使用形式。并研究了氣冷服在礦井熱環(huán)境下的應(yīng)用方案,對該方案進(jìn)行了分析。3.對所設(shè)計(jì)的氣冷服進(jìn)行傳熱分析。結(jié)合人體降溫機(jī)理,建立了氣冷服傳熱數(shù)學(xué)模型。分析了影響氣冷服降溫性能的影響因素,并進(jìn)行了數(shù)值模擬分析,分析結(jié)果表明:(1)制冷量隨著進(jìn)氣流量的增大而增大,但氣流不宜過大。在保證散熱量滿足需求同時(shí),須保證防護(hù)服的正壓力控制在一定范圍之內(nèi)。(2)進(jìn)氣溫度、濕度越低,冷卻服的制冷量越大,但不宜過低;通風(fēng)氣流的濕度對降溫服降溫效果影響比溫度影響更顯著。(3)外層衣服熱阻越小,人體散熱速率越快。(4)環(huán)境溫度越高,衣服的內(nèi)外層溫度越大,且內(nèi)層溫度增長速率要高于外層服裝溫度的增長速率。4.搭建了氣冷降溫的性能測試實(shí)驗(yàn)臺(tái),實(shí)驗(yàn)研究了所設(shè)計(jì)的氣冷降溫服的制冷性能,分析了進(jìn)氣壓力、冷閥開度、進(jìn)氣溫度等對降溫性能的影響。實(shí)驗(yàn)結(jié)果表明:(1)渦流管的冷端出口溫度隨著壓力的增大越來越低,其制冷效應(yīng)越來越好;而氣冷服的降溫性能隨著進(jìn)氣壓力的增大,人體微氣候區(qū)的溫度也越來越低,但進(jìn)氣壓力不宜過大,必須控制在一定范圍之內(nèi)。(2)渦流管的旋鈕開度在所有渦流管氣冷服的降溫性能影響因素中起著關(guān)鍵作用,其開度大小直接影響著其降溫性能。旋鈕開度存在著最佳位置,開度過小或過大都會(huì)損壞其降溫性能,因此在使用時(shí)應(yīng)注意必須使旋鈕開度在最佳位置附近。(3)溫度對氣冷服的降溫性能有一定的影響。但由于在實(shí)際工況下氣源來自周圍環(huán)境空氣,特別是在礦井熱環(huán)境下氣體溫度較高,本實(shí)驗(yàn)主要是為了驗(yàn)證降溫服在高溫環(huán)境下的適應(yīng)性。實(shí)驗(yàn)結(jié)果表明在35℃的高溫空氣下,氣冷服仍能維持微氣候區(qū)溫度在舒適的范圍之內(nèi)。
[Abstract]:With the continuous development of mineral resources, deep mining of mines has become an inevitable trend. Thermal hazard has become one of the major disasters endangering mine safety production. There are many problems in the traditional mine heat damage control methods, such as large initial investment, high operating cost, noise pollution and poor refrigeration effect during operation. With the change of working face, the refrigeration equipment moves, the installation is very difficult and the hidden trouble of safety and so on. At the same time, as a personal protective equipment at high temperature, cooling clothing is gradually rising. In open space, large environment and some special occasions, cooling clothes have incomparable advantages. Based on the above analysis, this paper explores the application of cooling clothing in mine thermal environment, hoping to provide a useful reference for mine thermal damage control. The main contents and conclusions of this paper are as follows: 1. In view of the existing problems in mine thermal hazard control, the personal protection method of air-cooled suit applied to mine thermal hazard control is put forward. On the basis of summing up the current application status of cooling clothing, this paper analyzes the feasibility of its application in mine thermal environment. Based on the principles of biological thermodynamics and biological heat transfer, the mechanism of microclimate cooling in thermal environment is analyzed. Based on the analysis of the mechanism of microclimate human body cooling, the structure design of air-cooled suit under high temperature and heat environment is carried out, and the application form of air-cooled suit is determined. The application scheme of air-cooled suit in mine thermal environment is studied, and the scheme is analyzed. The heat transfer analysis of the designed air-cooled suit is carried out. A mathematical model of heat transfer in air-cooled clothing was established based on the mechanism of body cooling. The influence factors on cooling performance of air-cooled suit are analyzed and numerical simulation is carried out. The results show that the refrigerating capacity increases with the increase of inlet air flow rate, but the air flow is not too large. At the same time, it is necessary to ensure that the positive pressure of protective clothing is controlled within a certain range of inlet air temperature. The lower the humidity, the greater the cooling capacity of the cooling suit, but not too low. The lower the thermal resistance of the outer clothing, the faster the heat dissipation rate of the body is, and the higher the ambient temperature, the greater the temperature of the inside and outside layer of the clothes, the more the effect of the humidity of the ventilated airflow on the cooling effect of the clothing is more than that of the temperature. The growth rate of inner layer temperature is higher than that of outer garment temperature. The performance test bench of air-cooled cooling was set up, the refrigeration performance of the air-cooled cooling suit was studied, and the effects of inlet pressure, cold valve opening and inlet air temperature on the cooling performance were analyzed. The experimental results show that the cold outlet temperature of the vortex tube decreases with the increase of pressure, and the cooling performance of the air-cooled clothing increases with the increase of the inlet pressure, and the temperature in the microclimate region of the human body becomes lower and lower with the increase of the inlet air pressure. However, the inlet pressure should not be too large, and the knob opening of the vortex tube must be controlled within a certain range. The knob opening of the vortex tube plays a key role in influencing the cooling performance of all the swirl tube air-cooled clothing, and its opening degree directly affects its cooling performance. The knob opening degree has the best position, it will damage the cooling performance when opening small or too much, so we should pay attention to make the knob opening degree near the best position.) the temperature has certain influence on the cooling performance of the air-cooled suit. However, because the gas source comes from the ambient air in the actual working conditions, especially in the hot mine environment, the main purpose of this experiment is to verify the adaptability of the cooling clothing under the high temperature environment. The experimental results show that the temperature of the air-cooled suit can still be kept in the comfortable range in the microclimate zone under the high temperature air temperature of 35 鈩，

本文編號：1881618