基于分离式热管的数据中心散热系统设计与能效分析
发布时间：2018-11-15 22:19
【摘要】：数据机房具有高热量密度、高耗能的特点,为保持机房内恒定温湿度,机房空调系统需全年全天不间断运行,而在满足散热需求的前提下,最大限度利用自然冷源则是降低空调能耗的最有效方法。本文以节能和良好的环境适应性为目标,对数据机房应用分离式热管的被动式散热方式进行了理论分析和实验研究。本文以本学科工程领域现有技术为基础,理论分析了应用分离式热管的意义及优势,建立了数据机房应用分离式热管散热系统的理论分析模型,研究换热效率随风量和迎风面积的变化关系,得出分离式热管散热下可运行的最高允许室外温度、全年运行时间、功耗及全年节电量等关键参数。应用CFD软件对数据机房进行数值模拟,获得了采用分离式热管散热器的机房内部温度场分布,并与普通空调进行了比较。针对室外温度下降所引起的室内侧送风温度过低问题,提出减小室外侧风量的具体改进措施。利用理论模型设计分离式热管换热系统蒸发段和冷凝段,提出可根据热负荷及实际机房灵活配置,建设成本低,有效适应机房现有散热系统的方法。在理论分析的基础上,完成了模拟基于分离式热管的数据机房散热系统实验平台的搭建、理论能耗分析、设计计算和性能实验。试验台由发热功率为8kW的模拟热源、冷热风道及室外模拟环境组成。通过调节热管系统充液率得到了最佳换热效果,得到了换热量相同时蒸发段风量与平衡温差的关系,以及同风量时不同室内外温差下的换热量及COP。实验结果表明:(a)在本文散热结构下,最佳充液率在46.28%,换热量达到设计指标;(b)换热量相同时平衡温差随蒸发段风量减小而增大;(c)风量相同时,换热量随着室内外温差的增加呈线性增加,功耗不变时,COP也随之线性增大。有关结论可为热管系统热负荷和制冷量调控提供依据。本文的理论分析和实验验证说明,分离式热管系统具有显著的节能效果,可有效适用于数据中心、通信基站等高热密度建筑的散热。
[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.
【学位授予单位】：中国科学院大学(中国科学院工程热物理研究所)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TK172.4;TP308
本文编号：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.
【学位授予单位】：中国科学院大学(中国科学院工程热物理研究所)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TK172.4;TP308
【参考文献】
中国期刊全文数据库 前10条
1 张恺;张小松;李舒宏;;地板送风数据机房空调系统气流组织的优化[J];东南大学学报(自然科学版);2016年01期
2 陈杰;;数据机房冷通道封闭技术应用及模拟分析[J];暖通空调;2015年06期
3 胡张保;张志伟;金听祥;邵双全;张海南;;采用微通道蒸发器的分离式热管充液率实验研究[J];制冷学报;2015年04期
4 张海南;邵双全;田长青;;机械制冷/回路热管一体式机房空调系统研究[J];制冷学报;2015年03期
5 胡张保;张志伟;金听祥;邵双全;杨滨滨;;分离式热管在机房空调系统中应用研究进展[J];低温与超导;2015年01期
6 王飞;王铁军;王俊;赵绍博;刘宏宇;李宏洋;吕继祥;赵丽;;动力型分离式热管在机房空调中研究与应用[J];低温与超导;2014年11期
7 王铁军;李宏洋;吴昊;王俊;赵绍博;王飞;王军;;一种多功能换热器的设计与试验[J];流体机械;2014年09期
8 陶洁;;分离式热管型空调工作特性研究的试验研究[J];制冷;2013年03期
9 张双;马国远;周峰;樊旭;;数据机房自然冷却用泵驱动回路热管换热机组性能实验研究[J];土木建筑与环境工程;2013年04期
10 王瑞华;王普;;隔离型热管换热节能系统的稳态建模与参数估计[J];北京工业大学学报;2013年06期
中国博士学位论文全文数据库 前2条
1 王润涛;机房用乙二醇换热器优化控制的研究[D];东北农业大学;2012年
2 周峰;两相闭式热虹吸管传热机理及其换热机组工作特性的研究[D];北京工业大学;2011年
，本文编号：2334563
本文链接：https://www.wllwen.com/shoufeilunwen/xixikjs/2334563.html
