發(fā)布時間：2018-05-31 17:55

  本文選題：隔爆空調(diào) + 雙節(jié)流空調(diào)�。� 參考：《天津大學》2014年碩士論文

【摘要】：煤礦井下變頻調(diào)速技術(shù)的使用,將可實現(xiàn)生產(chǎn)過程的自動化,提高生產(chǎn)效率,節(jié)約電能,綜合經(jīng)濟效益和社會效益具有明顯的提高。然而,井下環(huán)境惡劣,電氣設(shè)備存在于含有瓦斯和煤塵等爆炸性氣體環(huán)境中,必須采用隔爆殼體技術(shù)將變頻器密封于隔爆殼體內(nèi),確保在殼體內(nèi)所發(fā)生的電火花不會引爆殼體外部的爆炸性氣體。然而,變頻器在殼體內(nèi)的散熱嚴重影響其安全使用,同時冷熱變化帶來的結(jié)露效應(yīng)也會造成嚴重的短路危害。針對隔爆變頻器的散熱和內(nèi)部結(jié)露問題,本文提出隔爆型雙節(jié)流空調(diào)系統(tǒng)。文中首先介紹了隔爆型雙節(jié)流空調(diào)系統(tǒng)的工作原理。雙節(jié)流空調(diào)系統(tǒng)采用模塊化設(shè)計理念,綜合考慮礦用防爆安全、氣流組織合理以及形體結(jié)構(gòu)簡單等因素,運用隔爆殼體技術(shù),通過理論計算和技術(shù)驗證完成雙節(jié)流空調(diào)系統(tǒng)結(jié)構(gòu)設(shè)計。其次,針對變頻器在殼體內(nèi)的發(fā)熱點位置,設(shè)計了個性化通風模式,實現(xiàn)了針對性地強化冷卻模式,使設(shè)計的空調(diào)系統(tǒng)達到節(jié)省能量的效果。在之后的試驗工作中,依據(jù)空調(diào)的制冷原理、冷卻除濕理論以及耦合控制技術(shù)等,匹配設(shè)計出適合的隔爆型空調(diào)機組,并模擬井下環(huán)境進行實驗。通過實驗測試表明:雙節(jié)流空調(diào)系統(tǒng)在制冷工況下,開機45分鐘后,系統(tǒng)達到穩(wěn)定,隔爆殼內(nèi)最高溫度31.7℃;在除濕工況下,開機37分鐘后,系統(tǒng)達到穩(wěn)定,隔爆殼內(nèi)最大相對濕度33.4%,最高溫度36.3℃。分析得出雙節(jié)流空調(diào)系統(tǒng)散熱快,除濕效果好,能夠有效的避免殼體內(nèi)部結(jié)露,與傳統(tǒng)的水冷散熱系統(tǒng)相比更加節(jié)能、經(jīng)濟和可靠。由于雙節(jié)流空調(diào)性能獲得方式的單一性,進一步運用計算流體仿真軟件FLUENT對隔爆變頻器空調(diào)散熱系統(tǒng)進行數(shù)值模擬,得到實驗工況和設(shè)計工況下散熱模型的溫度場云圖、速度場云圖等,對比分析空調(diào)系統(tǒng)送風溫度對散熱效果的影響。數(shù)值模擬表明:模擬和實驗的結(jié)果有一致的趨勢和很高的吻合度,空調(diào)系統(tǒng)制冷除濕性能優(yōu)越。通過模擬設(shè)計工況下空調(diào)運行情況,證明該空調(diào)系統(tǒng)能夠滿足設(shè)計要求,為雙節(jié)流空調(diào)系統(tǒng)優(yōu)化設(shè)計和推廣應(yīng)用奠定基礎(chǔ)。隔爆型雙節(jié)流空調(diào)散熱系統(tǒng)是一次全新的探索,通過CFD模擬和實驗測試表明雙節(jié)流空調(diào)系統(tǒng)制冷除濕性能優(yōu)越。并且與其他的散熱方式相比具有散熱快,實現(xiàn)了溫濕度耦合控制,運行安全可靠等諸多優(yōu)點。
[Abstract]:The application of frequency conversion speed regulation technology in coal mine will realize the automation of production process, improve production efficiency, save electric energy, and improve the comprehensive economic and social benefits obviously. However, the underground environment is abominable and electrical equipment exists in the environment containing explosive gas such as gas and coal dust, so the frequency converter must be sealed in the flameproof shell by means of flameproof shell technology. Ensure that electrical sparks inside the shell do not detonate explosive gases outside the shell. However, the heat dissipation of the converter in the shell seriously affects its safe use, and the condensation effect caused by the change of cold and heat will also cause serious short-circuit harm. In this paper, a flameproof double throttle air conditioning system is proposed to solve the problems of heat dissipation and internal condensation of flameproof inverter. This paper first introduces the working principle of flameproof double throttle air conditioning system. The double throttle air conditioning system adopts the modular design idea, considering the factors such as safety of mine explosion-proof, reasonable airflow organization and simple body structure, etc., the technology of flameproof shell is used. The structure design of double throttle air conditioning system is completed by theoretical calculation and technical verification. Secondly, the individualized ventilation mode is designed in view of the heat point position of the converter in the shell, and the cooling mode is strengthened to achieve the energy saving effect of the designed air conditioning system. According to the refrigeration principle, cooling dehumidification theory and coupling control technology, a suitable flameproof air conditioning unit is designed, and the underground environment is simulated. The experimental results show that the system is stable and the maximum temperature in the flameproof shell is 31.7 鈩，

本文編號：1960768