基于分離式熱管的數(shù)據(jù)中心散熱系統(tǒng)設(shè)計與能效分析
發(fā)布時間：2018-11-15 22:19
【摘要】：數(shù)據(jù)機房具有高熱量密度、高耗能的特點,為保持機房內(nèi)恒定溫濕度,機房空調(diào)系統(tǒng)需全年全天不間斷運行,而在滿足散熱需求的前提下,最大限度利用自然冷源則是降低空調(diào)能耗的最有效方法。本文以節(jié)能和良好的環(huán)境適應(yīng)性為目標(biāo),對數(shù)據(jù)機房應(yīng)用分離式熱管的被動式散熱方式進(jìn)行了理論分析和實驗研究。本文以本學(xué)科工程領(lǐng)域現(xiàn)有技術(shù)為基礎(chǔ),理論分析了應(yīng)用分離式熱管的意義及優(yōu)勢,建立了數(shù)據(jù)機房應(yīng)用分離式熱管散熱系統(tǒng)的理論分析模型,研究換熱效率隨風(fēng)量和迎風(fēng)面積的變化關(guān)系,得出分離式熱管散熱下可運行的最高允許室外溫度、全年運行時間、功耗及全年節(jié)電量等關(guān)鍵參數(shù)。應(yīng)用CFD軟件對數(shù)據(jù)機房進(jìn)行數(shù)值模擬,獲得了采用分離式熱管散熱器的機房內(nèi)部溫度場分布,并與普通空調(diào)進(jìn)行了比較。針對室外溫度下降所引起的室內(nèi)側(cè)送風(fēng)溫度過低問題,提出減小室外側(cè)風(fēng)量的具體改進(jìn)措施。利用理論模型設(shè)計分離式熱管換熱系統(tǒng)蒸發(fā)段和冷凝段,提出可根據(jù)熱負(fù)荷及實際機房靈活配置,建設(shè)成本低,有效適應(yīng)機房現(xiàn)有散熱系統(tǒng)的方法。在理論分析的基礎(chǔ)上,完成了模擬基于分離式熱管的數(shù)據(jù)機房散熱系統(tǒng)實驗平臺的搭建、理論能耗分析、設(shè)計計算和性能實驗。試驗臺由發(fā)熱功率為8kW的模擬熱源、冷熱風(fēng)道及室外模擬環(huán)境組成。通過調(diào)節(jié)熱管系統(tǒng)充液率得到了最佳換熱效果,得到了換熱量相同時蒸發(fā)段風(fēng)量與平衡溫差的關(guān)系,以及同風(fēng)量時不同室內(nèi)外溫差下的換熱量及COP。實驗結(jié)果表明:(a)在本文散熱結(jié)構(gòu)下,最佳充液率在46.28%,換熱量達(dá)到設(shè)計指標(biāo);(b)換熱量相同時平衡溫差隨蒸發(fā)段風(fēng)量減小而增大;(c)風(fēng)量相同時,換熱量隨著室內(nèi)外溫差的增加呈線性增加,功耗不變時,COP也隨之線性增大。有關(guān)結(jié)論可為熱管系統(tǒng)熱負(fù)荷和制冷量調(diào)控提供依據(jù)。本文的理論分析和實驗驗證說明,分離式熱管系統(tǒng)具有顯著的節(jié)能效果,可有效適用于數(shù)據(jù)中心、通信基站等高熱密度建筑的散熱。
[Abstract]:The data computer room has the characteristics of high heat density and high energy consumption. In order to keep the constant temperature and humidity in the computer room, the air-conditioning system of the computer room needs to operate all the year round without interruption, and under the premise of meeting the requirement of heat dissipation, Maximum use of natural cold sources is the most effective way to reduce air conditioning energy consumption. Aiming at energy saving and good environmental adaptability, the passive heat dissipation mode of separate heat pipe in data computer room is analyzed theoretically and experimentally in this paper. Based on the existing technology in the field of engineering, this paper theoretically analyzes the significance and advantages of the application of separated heat pipe, and sets up a theoretical analysis model for the application of separated heat pipe heat dissipation system in the data machine room. The relationship of heat transfer efficiency with air volume and upwind area is studied. The key parameters such as maximum allowable outdoor temperature, annual operating time, power consumption and power saving under heat dissipation of separate heat pipe are obtained. The numerical simulation of the data room is carried out by using CFD software, and the temperature field distribution of the engine room using the separated heat pipe radiator is obtained and compared with that of the common air conditioning system. Aiming at the problem that the indoor air supply temperature is too low caused by the drop of outdoor temperature, the concrete improvement measures are put forward to reduce the outdoor air volume. By using the theoretical model to design the evaporative and condensing sections of the separated heat pipe heat transfer system, a method is put forward that can be configured flexibly according to the heat load and the actual machine room, and the construction cost is low, and the method can effectively adapt to the existing heat dissipation system in the computer room. On the basis of theoretical analysis, the experimental platform, theoretical energy consumption analysis, design calculation and performance experiment of the data engine room heat dissipation system based on separate heat pipe are built. The test bench consists of a simulated heat source with a heating power of 8kW, a cold and hot air duct and an outdoor simulation environment. The optimal heat transfer effect is obtained by adjusting the liquid filling rate of the heat pipe system. The relationship between the air volume in the evaporation section and the equilibrium temperature difference is obtained when the heat transfer is the same, and the heat transfer and COP. under different indoor and outdoor temperature differences under the same air volume are obtained. The experimental results show that the optimal liquid-filling rate of: (a) is 46.28 under the heat dissipation structure in this paper. The equilibrium temperature difference increases with the decrease of evaporation air flow when the heat exchange reaches the design target; (b) heat transfer is the same. At the same air volume of (c), the heat transfer increases linearly with the increase of indoor and outdoor temperature difference, and the COP increases linearly with constant power consumption. The conclusions can provide basis for heat load and refrigerating capacity control of heat pipe system. The theoretical analysis and experimental verification in this paper show that the separated heat pipe system has remarkable energy saving effect and can be effectively applied to the heat dissipation of high heat density buildings such as data center and communication base station.
【學(xué)位授予單位】：中國科學(xué)院大學(xué)(中國科學(xué)院工程熱物理研究所)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TK172.4;TP308
本文編號：2334563
[Abstract]:The data computer room has the characteristics of high heat density and high energy consumption. In order to keep the constant temperature and humidity in the computer room, the air-conditioning system of the computer room needs to operate all the year round without interruption, and under the premise of meeting the requirement of heat dissipation, Maximum use of natural cold sources is the most effective way to reduce air conditioning energy consumption. Aiming at energy saving and good environmental adaptability, the passive heat dissipation mode of separate heat pipe in data computer room is analyzed theoretically and experimentally in this paper. Based on the existing technology in the field of engineering, this paper theoretically analyzes the significance and advantages of the application of separated heat pipe, and sets up a theoretical analysis model for the application of separated heat pipe heat dissipation system in the data machine room. The relationship of heat transfer efficiency with air volume and upwind area is studied. The key parameters such as maximum allowable outdoor temperature, annual operating time, power consumption and power saving under heat dissipation of separate heat pipe are obtained. The numerical simulation of the data room is carried out by using CFD software, and the temperature field distribution of the engine room using the separated heat pipe radiator is obtained and compared with that of the common air conditioning system. Aiming at the problem that the indoor air supply temperature is too low caused by the drop of outdoor temperature, the concrete improvement measures are put forward to reduce the outdoor air volume. By using the theoretical model to design the evaporative and condensing sections of the separated heat pipe heat transfer system, a method is put forward that can be configured flexibly according to the heat load and the actual machine room, and the construction cost is low, and the method can effectively adapt to the existing heat dissipation system in the computer room. On the basis of theoretical analysis, the experimental platform, theoretical energy consumption analysis, design calculation and performance experiment of the data engine room heat dissipation system based on separate heat pipe are built. The test bench consists of a simulated heat source with a heating power of 8kW, a cold and hot air duct and an outdoor simulation environment. The optimal heat transfer effect is obtained by adjusting the liquid filling rate of the heat pipe system. The relationship between the air volume in the evaporation section and the equilibrium temperature difference is obtained when the heat transfer is the same, and the heat transfer and COP. under different indoor and outdoor temperature differences under the same air volume are obtained. The experimental results show that the optimal liquid-filling rate of: (a) is 46.28 under the heat dissipation structure in this paper. The equilibrium temperature difference increases with the decrease of evaporation air flow when the heat exchange reaches the design target; (b) heat transfer is the same. At the same air volume of (c), the heat transfer increases linearly with the increase of indoor and outdoor temperature difference, and the COP increases linearly with constant power consumption. The conclusions can provide basis for heat load and refrigerating capacity control of heat pipe system. The theoretical analysis and experimental verification in this paper show that the separated heat pipe system has remarkable energy saving effect and can be effectively applied to the heat dissipation of high heat density buildings such as data center and communication base station.
【學(xué)位授予單位】：中國科學(xué)院大學(xué)(中國科學(xué)院工程熱物理研究所)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TK172.4;TP308
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