新风间接换热式数据中心空调辅助系统的节能研究

发布时间：2018-05-10 06:16

本文选题：数据中心 + 自然冷源　；参考：《河北工程大学》2013年硕士论文

【摘要】：能源是各国国民经济发展的动力，关系到社会的运行和国家的安全，同时也关系到生态环境的保护和子孙后代的生存与发展，能源是必不可少的社会和经济发展的物质前提。随着经济的腾飞，人类已经进入了高科技、高效率的信息时代，，信息产业的飞速发展加速了人类文明的进步，但在能源日益紧缺的今天，数据中心的高能耗已经变成了人们必须面对且亟待解决的新问题。数据中心是信息产业的中枢系统，随着信息产业技术的升级和发展，对数据中心的需求快速增长，而一线城市建设用地的限制迫使数据中心提高空间利用率，加上各类IT设备向小型化、高处理能力演变，促使数据中心逐渐向高密度方向发展。据统计，近十年来，数据中心IT设备功率密度从300瓦/平方米增加到超过2000瓦/平方米。单个机柜容纳的设备功率从不到1千瓦增长到接近10千瓦。高密度设备布局直接带来高密度散热，对冷却系统提出的要求越来越苛刻，导致近年来数据中心空调系统能耗急剧增长。数据中心不间断的散热，冷负荷全年都保持在较高的水平，因此很多地区即使在冬天也要开启制冷机组对机房降温，很不合理。本文以上海地区某办公楼自用型数据中心为模型，研究了间接利用自然冷源的空调辅助系统。文章首先对建筑模型进行了简单介绍，并通过DeST软件对机房的负荷进行模拟分析，从而根据机房内逐时变动的冷负荷确定机房逐时所需的送风量及送风温度。再根据这些数据通过对比分析出了该数据中心机房模型间接利用自然冷源的节能潜力。由于随着室外温度的变化，机房所需的冷风量也在变化，风机需要变频运行，因此，文章还对换热器的性能随风量的变化情况进行了模拟，主要包括换热效率、换热量、换热系数以及压力损失随冷风量的不同需求而发生的改变。其中，压力损失的随风量的变化趋势可以作为风机变频的计算依据。通过一系列的计算与模拟，最终得出了新风间接换热式空调辅助系统的年节电情况。文章最后对文中的不足之处进行了总结与展望，如该系统只考虑了单独运行机房空调与单独运行基站换热器的情况，而没有考虑当室外温度虽然低于室内温度，但无法承担全部冷负荷时，机房空调与基站换热器共同运行的情况。因此，在本文的计算结果的基础上，仍有一部分节能潜力有待发掘，笔者会在今后的学习与工作中继续探究。
[Abstract]:Energy is the driving force of the national economic development of every country, relates to the operation of the society and the security of the country, and also relates to the protection of the ecological environment and the survival and development of the future generations. Energy is the essential material premise of the social and economic development. With the rapid development of economy, mankind has entered the information age of high technology and high efficiency. The rapid development of information industry accelerates the progress of human civilization. The high energy consumption of data center has become a new problem that must be faced and solved urgently. Data center is the central system of information industry. With the upgrading and development of information industry technology, the demand for data center increases rapidly. In addition, all kinds of IT equipment to miniaturization, high processing capacity evolution, promote the development of data centers to the direction of high density. According to statistics, in the past ten years, the power density of IT equipment in data center has increased from 300W / m2 to more than 2000 W / m2. A single cabinet accommodates equipment power from less than one kilowatt to nearly 10 kilowatts. The layout of high density equipment directly brings about high density heat dissipation, and the requirement for cooling system is becoming more and more stringent, which leads to the sharp increase of energy consumption in data center air conditioning system in recent years. The data center continuously dissipates heat, the cooling load is kept at a high level all year round, so it is unreasonable to open the refrigeration unit to cool the engine room in many areas even in winter. Based on the data center of an office building in Shanghai, this paper studies the auxiliary air conditioning system which indirectly utilizes the natural cold source. This paper introduces the building model and simulates the load of the engine room by DeST software, so as to determine the air supply rate and air temperature according to the hourly cooling load in the engine room. Based on these data, the energy saving potential of the data center computer room model using natural cold source is analyzed. With the change of outdoor temperature, the amount of cold air needed in the engine room is also changing, and the fan needs frequency conversion operation. Therefore, the performance of heat exchanger with the change of air volume is simulated in this paper, including heat transfer efficiency and heat transfer. The change of heat transfer coefficient and pressure loss with different demand of cold air. The variation trend of pressure loss with air volume can be used as the basis for the calculation of fan frequency conversion. Through a series of calculation and simulation, the annual power saving of the auxiliary system of indirect heat transfer air conditioning with fresh air is obtained. At the end of the paper, the shortcomings of the paper are summarized and prospected. For example, the system only takes into account the single operation of the air-conditioning in the engine room and the heat exchanger of the base station, but not when the outdoor temperature is lower than the indoor temperature. But can not bear all the cooling load, room air-conditioning and base-station heat exchanger operation. Therefore, on the basis of the results of this paper, there is still a part of energy saving potential to be explored, the author will continue to explore in the future study and work.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831

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