35kW数据中心热管复合型空调模块设计研究

发布时间：2018-03-14 11:33

本文选题：数据中心　切入点：系统设计　出处：《合肥工业大学》2013年硕士论文　论文类型：学位论文

【摘要】：针对高性能计算机大功率、高热密度的电子冷却需求,基于节能、高可靠性和良好的调节特性为目标,提出了一种蒸气压缩/分离式热管复合制冷机组的方案。热管复合制冷系统具有压缩式制冷、压缩式/热管复合制冷和热管制冷三种工作模式,采用屏蔽泵驱动热管系统主动循环,可根据室内外温差和热负荷状况自动切换。在外界环境温度低于被控对象设定温度的气候条件下,运行热管循环不仅可以大幅降低冷源设备的能耗,而且可以避免运行压缩式制冷的高能耗、低温启动和回油润滑等问题。本文主要工作内容有：(1)收集、分析国内外相关技术资料,了解热管技术的研究与应用现状；调研用户技术需求、空调对象负荷特性,为空调机组的系统设计提供依据；(2)根据某高性能计算机高热密度电子冷却需求,提出热管复合型空调模块化设计方案；(3)建立热管系统的数学模型,模拟研究变工况运行性能,为热管复合型空调模块优化设计和能量调节与控制建立基础；(4)进行35kW热管复合型空调模块设计,其中包括热力循环系统设计、换热器设计、液泵设计选型、储液器设计等。本文取得的阶段性研究成果：(1)提出了具有自主知识产权的复合型空调循环系统设计方案,采用动力型分离式热管,复合区的引入拓宽了热管循环工作温区,可更有效利用低温季节的自然冷源,大幅度节能减排；(2)采用模块化设计方案,可根据空调对象的负荷状况灵活配置,便于规模化生产和降低制造成本；(3)热管复合型空调模块的制冷单元与热管单元具有独立的制冷剂流通回路,并在蒸发冷凝器处实现复合；(4)模拟分析了热管的循环过程和工作性能,给出了热管单元的能量调节方式,并模拟计算了35kW热管复合型空调模块的全年运行总能耗。模拟结果表明：热管复合区的引入有效拓宽了热管的运行温区,提高了空调系统的全年综合COP,与传统蒸汽压缩式冷源系统相比,节能率大于40%,特别适用于高性能计算机等高热密度电子集成系统全天候温控需要。
[Abstract]:Aiming at the high power and high heat density electronic cooling demand of high performance computer, the aim is based on energy saving, high reliability and good adjustment characteristics. A scheme of steam compression / split heat pipe composite refrigeration unit is presented. The heat pipe composite refrigeration system has three working modes: compression refrigeration, compression / heat pipe composite refrigeration and heat pipe refrigeration. The active circulation of heat pipe system driven by shield pump can be automatically switched according to the indoor and outdoor temperature difference and heat load condition. The operation of heat pipe cycle can not only greatly reduce the energy consumption of cold source equipment, but also avoid the problems of high energy consumption, low temperature start-up and oil return lubrication in the operation of compression refrigeration. Analyze the relevant technical data at home and abroad, understand the current research and application of heat pipe technology, investigate the technical requirements of users, the load characteristics of air conditioning objects, According to the requirement of high heat density electronic cooling of a high performance computer, a modular design scheme of heat pipe composite air conditioning system is proposed. The mathematical model of heat pipe system is established and the performance of the heat pipe system is simulated and studied. For the optimization design of heat pipe composite air conditioning module and the foundation of energy regulation and control, the design of 35 kW heat pipe composite air conditioning module is carried out, including heat circulation system design, heat exchanger design, liquid pump design and type selection. The design of liquid accumulator and so on. The stage research achievement of this paper is: 1) the design scheme of composite air conditioning cycle system with independent intellectual property rights is put forward. The use of dynamic separated heat pipe, the introduction of compound zone widens the working temperature zone of heat pipe circulation. It can make more effective use of natural cold source in low temperature season, save energy and reduce emissions by a large margin. It adopts modular design scheme and can be configured flexibly according to the load condition of air conditioning object. The refrigeration unit and the heat pipe unit of the heat pipe composite air conditioning module have independent refrigerant circulation circuit, which is convenient for large-scale production and reduces the manufacturing cost. The cycle process and working performance of the heat pipe are simulated and analyzed, and the energy regulation mode of the heat pipe unit is given. The annual total energy consumption of 35kW heat pipe composite air conditioning module is simulated and calculated. The simulation results show that the introduction of the heat pipe composite zone can effectively widen the operating temperature zone of the heat pipe. Compared with the traditional steam compression cold source system, the energy saving rate is more than 40. It is especially suitable for all-weather temperature control of electronic integrated systems with high thermal density, such as high performance computers.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TB657

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