本文選題：數(shù)據(jù)機(jī)房 + 封閉冷通風(fēng)道��； 參考：《南京工業(yè)大學(xué)》2015年碩士論文

【摘要】：數(shù)據(jù)機(jī)房?jī)?nèi)部設(shè)備復(fù)雜,制冷要求較高,氣流組織的節(jié)能優(yōu)化也一直困難重重。針對(duì)輸送困難、機(jī)柜內(nèi)部存在局部熱點(diǎn)、制冷效率低等問(wèn)題,本文通過(guò)計(jì)算流體力學(xué)數(shù)值模擬手段,以提高模擬的精準(zhǔn)性、改善氣流組織為著重點(diǎn),做了一系列嘗試。首先簡(jiǎn)要敘述了數(shù)據(jù)機(jī)房在氣流組織改善方面的研究現(xiàn)狀,對(duì)所采用的數(shù)值方法做了簡(jiǎn)要介紹。并提出了將服務(wù)器細(xì)節(jié)體現(xiàn)在模型當(dāng)中這一建模方式,采用已有的實(shí)驗(yàn)數(shù)據(jù)驗(yàn)證了該種建模方法與傳統(tǒng)建模方法數(shù)值模擬結(jié)果的可靠性,在此基礎(chǔ)上做了進(jìn)一步研究。然后以單通道地板側(cè)送風(fēng)模型為研究對(duì)象,研究了不同服務(wù)器排列方式對(duì)機(jī)柜冷卻效果的影響,通過(guò)列舉6組排列模型,將溫度場(chǎng)與機(jī)柜進(jìn)風(fēng)口、出風(fēng)口溫度進(jìn)行分析對(duì)比,得出結(jié)論,在該種機(jī)房布置形式下,服務(wù)器均勻排列且保持空隙時(shí)冷卻效果是最好的,同時(shí)也提出,當(dāng)不同功率服務(wù)器擺放至機(jī)柜內(nèi)部時(shí),將高功率服務(wù)器擺放在機(jī)柜下部是推薦的做法,并通過(guò)兩組模型進(jìn)行了驗(yàn)證。最后,針對(duì)整個(gè)機(jī)房的氣流組織進(jìn)行了優(yōu)化分析,著重研究了封閉冷通道架空地板的高度、孔板孔隙率、封閉冷通道寬度這幾個(gè)因素對(duì)機(jī)房氣流組織、機(jī)柜冷卻效果方面的影響,并采用RHI(回?zé)嶂笖?shù))評(píng)價(jià)分析了每種氣流組織的冷量利用率。結(jié)果顯示封閉冷通道架空地板的高度對(duì)增加機(jī)房溫度分布的均勻性有較好的作用,當(dāng)架空地板的高度增加到一定程度時(shí)(0.5m),其作用達(dá)到穩(wěn)定水平,不再隨高度增加而增加；較大的孔隙率不但不能提高冷卻效果,反而會(huì)使機(jī)柜平均溫度上升,通過(guò)增大孔隙率來(lái)實(shí)現(xiàn)提高送風(fēng)效果的做法是錯(cuò)誤的：冷通道寬度的增加能夠?qū)鋮s效果有一定的提升,但是當(dāng)通道寬度大于1.3m時(shí),提升效果不再明顯,故當(dāng)空間允許的情況下可以適當(dāng)增大冷通道寬度但不可過(guò)分依賴。本文的亮點(diǎn)是提出了將服務(wù)器細(xì)節(jié)體現(xiàn)在模型當(dāng)中的一種新的建模方式,區(qū)別于傳統(tǒng)的“黑箱模型”,其與實(shí)驗(yàn)測(cè)試值的吻合度更高,模擬結(jié)果更為精準(zhǔn)。本文的局限性在于在后續(xù)研究中,只針對(duì)于單通道地板側(cè)送風(fēng)形式,而實(shí)際生活中機(jī)房布置要復(fù)雜的多,但仍能給數(shù)據(jù)機(jī)房的節(jié)能設(shè)計(jì)提供一定的建議。
[Abstract]:The interior equipment of the data room is complex, the refrigeration requirement is high, and the energy saving optimization of the airflow organization is always difficult. Aiming at the problems of difficult transportation, local hot spots in the cabinet and low refrigeration efficiency, a series of attempts have been made in this paper to improve the accuracy of simulation and improve the airflow organization by means of numerical simulation of computational fluid dynamics (CFD). Firstly, the research status of air distribution improvement in the data room is briefly described, and the numerical methods used are briefly introduced. The modeling method of server details in the model is proposed, and the reliability of the modeling method and the numerical simulation results of the traditional modeling method are verified by using the existing experimental data. On this basis, further research is done. Then take the single channel floor side air supply model as the research object, studied the different server arrangement way to the cabinet cooling effect influence, through enumerates 6 groups of arrangement models, the temperature field and the machine cabinet inlet, the air outlet temperature carries on the analysis contrast, It is concluded that the cooling effect is the best when the servers are arranged evenly and the gaps are kept in the computer room layout. At the same time, it is proposed that when different power servers are placed inside the cabinet, It is recommended to put the high power server in the lower part of the cabinet, which is verified by two groups of models. Finally, the optimization analysis of the airflow organization of the whole machine room is carried out, and the airflow organization of the machine room is mainly studied, such as the height of the closed cold channel overhead floor, the porosity of the hole plate and the width of the closed cold passage. The effect of cooling efficiency on the cooling efficiency of the cabinet was analyzed by RHI (Regeneration Index). The results show that the height of the overhead floor in closed cold passage has a good effect on increasing the uniformity of temperature distribution in the machine room. When the height of the overhead floor increases to a certain extent (0.5 m), its action reaches a stable level and no longer increases with the increase of height; The larger porosity can not improve the cooling effect, on the contrary, it will increase the average temperature of the cabinet. It is wrong to increase the porosity to improve the air supply effect: the increase of the cold channel width can improve the cooling effect to a certain extent. However, when the channel width is greater than 1.3 m, the lifting effect is no longer obvious, so the cold channel width can be appropriately increased when space permits, but can not be over-dependent. The highlight of this paper is that a new modeling method is proposed, which embodies the server details in the model, which is different from the traditional "black-box model", which has a higher consistency with the experimental test value and more accurate simulation results. The limitation of this paper is that in the follow-up research, it is only aimed at the single channel floor air supply form, but the layout of the computer room is much more complicated in real life, but it can still provide some suggestions for the energy saving design of the data computer room.
【學(xué)位授予單位】：南京工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU831

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