本文選題：隔爆空調(diào) + 雙節(jié)流空調(diào)　； 參考：《天津大學(xué)》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(shí)現(xiàn)生產(chǎn)過(guò)程的自動(dòng)化,提高生產(chǎn)效率,節(jié)約電能,綜合經(jīng)濟(jì)效益和社會(huì)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(huì)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(yán)重影響其安全使用,同時(shí)冷熱變化帶來(lái)的結(jié)露效應(yīng)也會(huì)造成嚴(yán)重的短路危害。針對(duì)隔爆變頻器的散熱和內(nèi)部結(jié)露問(wèn)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(jì)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(jiǎn)單等因素,運(yùn)用隔爆殼體技術(shù),通過(guò)理論計(jì)算和技術(shù)驗(yàn)證完成雙節(jié)流空調(diào)系統(tǒng)結(jié)構(gòu)設(shè)計(jì)。其次,針對(duì)變頻器在殼體內(nèi)的發(fā)熱點(diǎn)位置,設(shè)計(jì)了個(gè)性化通風(fēng)模式,實(shí)現(xiàn)了針對(duì)性地強(qiáng)化冷卻模式,使設(shè)計(jì)的空調(diào)系統(tǒng)達(dá)到節(jié)省能量的效果。在之后的試驗(yàn)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(jì)出適合的隔爆型空調(diào)機(jī)組,并模擬井下環(huán)境進(jìn)行實(shí)驗(yàn)。通過(guò)實(shí)驗(yàn)測(cè)試表明:雙節(jié)流空調(diào)系統(tǒng)在制冷工況下,開(kāi)機(jī)45分鐘后,系統(tǒng)達(dá)到穩(wěn)定,隔爆殼內(nèi)最高溫度31.7℃;在除濕工況下,開(kāi)機(jī)37分鐘后,系統(tǒng)達(dá)到穩(wěn)定,隔爆殼內(nèi)最大相對(duì)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(jì)和可靠。由于雙節(jié)流空調(diào)性能獲得方式的單一性,進(jìn)一步運(yùn)用計(jì)算流體仿真軟件FLUENT對(duì)隔爆變頻器空調(diào)散熱系統(tǒng)進(jìn)行數(shù)值模擬,得到實(shí)驗(yàn)工況和設(shè)計(jì)工況下散熱模型的溫度場(chǎng)云圖、速度場(chǎng)云圖等,對(duì)比分析空調(diào)系統(tǒng)送風(fēng)溫度對(duì)散熱效果的影響。數(shù)值模擬表明:模擬和實(shí)驗(yàn)的結(jié)果有一致的趨勢(shì)和很高的吻合度,空調(diào)系統(tǒng)制冷除濕性能優(yōu)越。通過(guò)模擬設(shè)計(jì)工況下空調(diào)運(yùn)行情況,證明該空調(diào)系統(tǒng)能夠滿足設(shè)計(jì)要求,為雙節(jié)流空調(diào)系統(tǒng)優(yōu)化設(shè)計(jì)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(guò)CFD模擬和實(shí)驗(yàn)測(cè)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(shí)現(xiàn)了溫濕度耦合控制,運(yùn)行安全可靠等諸多優(yōu)點(diǎn)。
[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(hào)：1960768