【摘要】：空調(diào)噴水室是一種傳統(tǒng)的空氣處理裝置,論文以空調(diào)噴水室為研究對象,在保證達(dá)到其基本的空氣處理功能,維持室內(nèi)溫濕度參數(shù)穩(wěn)定的前提下,對其噴嘴的布置方式和出口霧化液滴的粒徑大小等參數(shù)進(jìn)行優(yōu)化研究,以提高其對空氣中細(xì)顆粒物的過濾效率。論文采用的方法為數(shù)值模擬與實(shí)驗(yàn)相結(jié)合的方法。首先,應(yīng)用CFD軟件,對噴水室內(nèi)的流場進(jìn)行了數(shù)值模擬,得出改變噴嘴排管間距、噴嘴孔徑大小、噴嘴管排數(shù)和噴嘴射流方向等參數(shù)對噴水室內(nèi)流場的影響,同時(shí)模擬了進(jìn)口風(fēng)速對細(xì)顆粒物及霧化液滴運(yùn)動軌跡的影響,結(jié)合細(xì)顆粒物的運(yùn)動理論模型,得出了利于液滴捕集細(xì)顆粒物的變化參數(shù),為后面的實(shí)驗(yàn)提供了參考和對比驗(yàn)證的依據(jù)。然后,通過實(shí)驗(yàn)的方式對不同工況下細(xì)顆粒物過濾效率進(jìn)行了研究,并得到了具體的實(shí)驗(yàn)數(shù)據(jù),通過分析數(shù)據(jù)得出了最佳的噴嘴布置方式及霧化液滴的粒徑;同時(shí)對實(shí)驗(yàn)裝置前后壓降和相應(yīng)的耗水量進(jìn)行測量后發(fā)現(xiàn),模型整體壓降較小,耗水量也相對較少。最后,對比分析了排管間距、噴嘴孔徑大小等參數(shù)對細(xì)顆粒物過濾效率的影響,并參考數(shù)值模擬和實(shí)驗(yàn)結(jié)果,對噴水室內(nèi)射流噴嘴的布置方式進(jìn)行了優(yōu)化,后經(jīng)實(shí)驗(yàn)驗(yàn)證得出,在進(jìn)口風(fēng)速為2.75m/s時(shí),實(shí)驗(yàn)裝置對粒徑為0.3~0.5μm細(xì)顆粒物的過濾效率為11%;對粒徑為0.5~1.0μm細(xì)顆粒物的過濾效率為69%;對粒徑為1.0~2.5μm細(xì)顆粒物的過濾效率大于95%。
[Abstract]:Air conditioning spray chamber is a kind of traditional air treatment device. This paper takes the air conditioning spray chamber as the research object, under the premise of ensuring its basic air processing function and maintaining the stability of indoor temperature and humidity parameters. In order to improve the filtration efficiency of fine particles in air, the parameters such as the arrangement of nozzle and the size of atomized droplets at the outlet were optimized. The method used in this paper is the combination of numerical simulation and experiment. Firstly, the flow field in the spray chamber is simulated by CFD software, and the influence of the parameters such as nozzle spacing, nozzle aperture, nozzle discharge number and nozzle jet direction on the flow field is obtained. At the same time, the influence of inlet wind speed on the trajectory of fine particles and atomized droplets is simulated. Combined with the motion theory model of fine particles, the variation parameters of fine particles are obtained. It provides a reference for the later experiments and a basis for comparison and verification. Then, the filtration efficiency of fine particles under different working conditions was studied by experimental method, and the specific experimental data were obtained. The optimal nozzle arrangement and the size of atomized droplets were obtained by analyzing the data. At the same time, the pressure drop and the corresponding water consumption before and after the experimental device are measured, it is found that the overall pressure drop of the model is relatively small, and the water consumption is relatively small. Finally, the effects of the parameters such as pipe spacing and nozzle aperture on the filtration efficiency of fine particles are compared and analyzed. With reference to the numerical simulation and experimental results, the arrangement of jet nozzles in the water jet chamber is optimized, and the results are verified by experiments. When the inlet wind speed is 2.75m/s, the filtration efficiency of the experimental device is 11 for fine particles with 0.3U 0.5 渭 m diameter, 69 for 0.5 渭 m fine particles with 0.5 渭 m diameter, and more than 95 for 1.0 渭 m fine particles with 1.0 渭 m diameter.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TU834.8

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