数据机房用顶置空调数值模拟及性能研究

发布时间：2018-07-03 18:00

本文选题：数据机房 + 空调数字化设计　；参考：《湖南大学》2015年硕士论文

【摘要】：近年来,移动通信设备飞速发展,数据机房的分布面迅速扩大,数据机房的数量也越来越多。在通信系统的建设和运行中,空调系统能耗占据总能耗的30%-45%,并且比例在逐渐增大,数据机房的节能逐渐引起了人们的重视。通讯数据机房原来的冷却对象是整个机房,其耗电量相当大。现在部分机柜整体设计为全封闭式结构,空调采用顶置空调。与敞开式相比,采用顶置空调的全封闭式结构的机柜耗电量大大降低。IT设备最怕过热,灰尘是导致过热的一个因素。为了达到防尘目的,人们通常把这些重要设备放置在封闭的机房里。采用更合理的一体化设计的机房具有更高的实用性、先进性、可扩展性、可管理性和可维护性。本文以某通信企业的数据机房为对象,对采用顶置空调的全封闭式结构的机柜开展了研究。对顶置空调进行数值仿真,并采用CFD商业软件FLUENT对数据机房热环境进行模拟,得出机房运行环境。主要开展了三方面的研究工作：本文首先根据顶置空调的结构及参数,用C语言对空调整体系统和各个部件分别进行数值仿真,得出空调系统的性能和送风温度,并且由数值模拟结果可看出选择的整个系统和各部件模型是否合适。然后,为得出风温度对进风温度的影响,本文用C语言编写UDF函数,且通过现场测量得到了通讯数据机房的简化物理模型,并选用恰当的连续性方程、动量守恒方程、能量守恒方程、k-ε方程和边界条件、初始条件,借助CFD仿真软件对数据机房的热环境进行数值模拟计算。应用编写的UDF,当室内温度对进风温度的影响稳定时,得到数据机房气流的速度场、温度场分布,由模拟的结果看出数据机房内气流组织存在不合理的地方。最后,对顶置空调进行数值仿真模拟,得到空调系统的性能及室内外温度变化对空调系统性能的影响,数值模拟的结果表明随着室内的温度升高,蒸发温度、冷凝温度、能效比也随之升高；随着室外的温度升高,冷凝温度也随之升高,能效比减小,蒸发温度的变化不明显。
[Abstract]:In recent years, with the rapid development of mobile communication equipment, the distribution of the data computer room is expanding rapidly, and the number of the data computer room is more and more. In the construction and operation of the communication system, the energy consumption of the air conditioning system accounts for 30-45% of the total energy consumption, and the proportion is gradually increasing. The original cooling object of the communication data room is the whole computer room, which consumes a lot of electricity. Now part of the cabinet overall design for a closed structure, air-conditioning using top air-conditioning. Compared with the open type, the electricity consumption of the cabinet with fully enclosed structure with top air conditioning is greatly reduced. The dust is one of the factors leading to overheating. In order to prevent dust, people usually put these important equipment in closed machine room. The computer room with more reasonable integrated design has higher practicability, progressiveness, expansibility, manageability and maintainability. Taking the data computer room of a communication enterprise as an object, this paper studies the cabinet with fully enclosed structure of top air conditioning. The thermal environment of the data computer room is simulated by CFD commercial software fluent, and the operating environment of the computer room is obtained. Three aspects of the research work are mainly carried out: firstly, according to the structure and parameters of the top air conditioning system, the whole air conditioning system and each component are numerically simulated with C language, and the performance of the air conditioning system and the air temperature of the air supply system are obtained. From the numerical simulation results, we can see whether the whole system and each component model are suitable. Then, in order to find out the influence of the air temperature on the inlet air temperature, the UDF function is written in C language, and the simplified physical model of the communication data room is obtained by field measurement, and the appropriate continuity equation and momentum conservation equation are selected. The energy conservation equation and boundary conditions, initial conditions and CFD simulation software are used to simulate the thermal environment of the data room. When the influence of indoor temperature on inlet air temperature is stable, the velocity field and temperature field distribution of air flow in the data room are obtained. From the simulation results, it can be seen that the airflow distribution in the data room is unreasonable. Finally, the performance of the air conditioning system and the effect of indoor and outdoor temperature on the performance of the air conditioning system are obtained by numerical simulation. The results of numerical simulation show that with the increase of indoor temperature, evaporation temperature, condensation temperature, With the increase of outdoor temperature, the condensation temperature also increased, the energy efficiency ratio decreased, and the evaporation temperature did not change obviously.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU831

【参考文献】