本文選題：LED顯示屏　切入點(diǎn)：散熱設(shè)計　出處：《華中科技大學(xué)》2009年碩士論文　論文類型：學(xué)位論文

【摘要】： 目前,大型LED顯示屏廣泛應(yīng)用于室內(nèi)外各種公共場合顯示文字、圖像、動畫、視頻等信息,具有很強(qiáng)的廣告渲染力和震撼力,豐富和美化了人們的生活環(huán)境。但是LED顯示屏消耗的電能中80%～90%的能量轉(zhuǎn)換成了熱能,優(yōu)良的散熱是LED顯示屏可靠工作的重要保障,所以散熱成為亟待解決的瓶頸問題。本文研究的大型LED顯示屏這種系統(tǒng)級散熱設(shè)計,國內(nèi)外尚無學(xué)者對此課題進(jìn)行系統(tǒng)的研究。 本文講敘大型船用LED顯示屏散熱系統(tǒng)的設(shè)計過程,結(jié)合氣象條件、有關(guān)船體的設(shè)計圖紙以及相關(guān)設(shè)計規(guī)范,分別設(shè)計空調(diào)季節(jié)和過渡季節(jié)兩套散熱系統(tǒng),并在屏內(nèi)設(shè)置了四臺除濕機(jī)和用以實(shí)現(xiàn)遠(yuǎn)程控制的監(jiān)控系統(tǒng)。為了驗(yàn)證散熱系統(tǒng)設(shè)計的合理性,采用CFD專業(yè)軟件對空調(diào)工況和通風(fēng)工況屏內(nèi)的溫度場和速度場進(jìn)行了模擬,通過與實(shí)驗(yàn)數(shù)據(jù)對比,驗(yàn)證了數(shù)值模擬的可靠性。通過模擬分析發(fā)現(xiàn)空調(diào)工況存在屏內(nèi)上端存在局部溫度過高、送風(fēng)管末端出風(fēng)風(fēng)速過低以及下端通風(fēng)死角形成的熱斑;通風(fēng)工況模擬發(fā)現(xiàn)溫度場分布均勻,符合設(shè)計要求。 針對空調(diào)季節(jié)模擬發(fā)現(xiàn)的局部溫度過高、風(fēng)管末端出風(fēng)風(fēng)速過低和熱斑問題,提出了改變送風(fēng)管截面及送風(fēng)口尺寸、改變送風(fēng)管數(shù)量來提高面向熱源的出風(fēng)速度、改變出風(fēng)口形式、將空調(diào)冷卻與通風(fēng)冷卻相結(jié)合四種改進(jìn)方案,并逐一進(jìn)行模擬分析并對比。結(jié)果表明,調(diào)整風(fēng)管數(shù)量并將空調(diào)送風(fēng)量減半并輔以通風(fēng)冷卻的散熱方案下屏內(nèi)的氣流組織最為合理,流場分布較均勻,并且比單純采用空調(diào)冷卻的散熱方式每小時節(jié)省電能69.2kW。 本文提出的設(shè)計方案是對系統(tǒng)級LED顯示屏散熱的一次嘗試,其研究結(jié)果為大型LED顯示屏散熱系統(tǒng)的設(shè)計提供了參考依據(jù)。
[Abstract]:At present, large LED display screen is widely used to display text, image, animation, video and other information in and out of the room. It enriches and beautifies people's living environment. But 80% of the energy consumed by the LED screen is converted into heat energy, and excellent heat dissipation is an important guarantee for the reliable work of the LED display screen. Therefore, heat dissipation has become a bottleneck problem to be solved urgently. In this paper, the large-scale LED display screen is a kind of system-level heat dissipation design, which has not been systematically studied by scholars at home and abroad. This paper describes the design process of the heat dissipation system of the LED display screen for large ships. Combined with the meteorological conditions, the design drawings of the hull and the relevant design specifications, two sets of heat dissipation systems for the air conditioning season and the transition season are designed respectively. In order to verify the rationality of the design of the heat dissipation system, the temperature field and velocity field in the screen of air conditioning and ventilation conditions are simulated by using CFD professional software, and four dehumidifiers are installed in the screen to realize remote control. By comparing with the experimental data, the reliability of the numerical simulation is verified. Through simulation analysis, it is found that the local temperature in the upper end of the screen is too high, the wind velocity at the end of the supply duct is too low and the dead corner of the lower end of the ventilation is formed. The simulation of ventilation conditions shows that the temperature distribution is uniform and meets the design requirements. In view of the local temperature too high, the wind velocity at the end of the air duct being too low and the heat spot problems found in the seasonal simulation of air conditioning, it is put forward to change the section and the size of the air supply duct and the number of the air supply tube to improve the air outlet speed for the heat source. By changing the air outlet form and combining the air conditioning cooling with ventilation cooling, the four improved schemes are simulated and analyzed one by one. The results show that, Under the scheme of adjusting the number of air ducts and halving the air supply volume of the air conditioning system with ventilation cooling, the airflow distribution in the screen is the most reasonable, and the flow field is more evenly distributed, and the electric energy is saved by 69.2 kW per hour compared with the heat dissipation mode of air conditioning cooling alone. The design scheme presented in this paper is an attempt for the heat dissipation of system-level LED display screen. The research results provide a reference for the design of large LED display panel heat dissipation system.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2009
【分類號】：TU831

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 楊內(nèi);;LED顯示屏智能配置的設(shè)計與實(shí)現(xiàn)[J];現(xiàn)代顯示;2011年03期

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本文編號：1589986