氨制冷系统热虹吸冷却技术

阐述了沸腾高压氨液作冷却液的热虹吸环流间接冷却的原理,介绍分析了带热虹吸贮液器的典型热虹吸油冷却系统、带卧式贮液器的热虹吸油冷却系统、多台油冷却器的热虹吸冷却系统的流程,以及热虹吸油冷却系统的设计。     

热虹吸油冷却系统的设计与分析

本文系统地分析介绍了目前国内外广泛采用的热虹吸油冷却系统,并详细分析了热虹吸油冷却系统中的设备及系统管路的设计原则,给出了一些经验参数,可供制冷设备生产厂商及设计院、用户参考.     

浅谈冷库制冷新技术新工艺及其对高职制冷专业实践教学的影响——以北海职业学院为例

文章介绍了上世纪七、八十代土建冷库的现状,着重解释了现代冷库螺杆机组、油冷却系统及热虹吸器的工作原理、蒸发式冷凝器及其安装设计等几个新技术新工艺,表明了冷库制冷新技术新工艺的发展促进了制冷专业的实践教学,对高职院校同类专业实践教学具有借鉴意义。     

热虹吸油冷却系统：数学模型与理论计算篇

近年来，热虹吸油冷却系统在国内逐步推广应用，但目前仍缺乏理论分析与计算模型，所以在实际应用中仍存在一些分歧与争论。本文尝试从建立数学模型开始，进行理论计算，从而得出能够指导实践的理论依据。     

水冷螺杆式冷水机组回油技术探讨

水冷螺杆式冷水机组的蒸发器回油是机组可靠性的关键,本文主要探讨气泵回油、热虹吸回油和引射器回油这3种回油方式在水冷螺杆式冷水机组中的应用。通过其工作原理和测试结果,分析3种回油方式的回油效果以及优缺点。     

天然气液化工厂立式虹吸再沸器设计标准要点

立式热虹吸再沸器有具有传热系数较大,结构紧凑,便于安装,投资低等特点。文中结合LNG脱重烃洗涤塔立式虹吸再沸器结构特点,提出相应的设计要点。     

热虹吸桶的应用与选型

本文简要介绍了热虹吸桶在制冷系统的应用范围、选型方法及安装应注意的一些要求.     

北京万众空调制冷设备公司

北京万众空调制冷设备公司众牌风冷式模块化中央空调冷（热）水机组将冷却系统设计为风冷却方式，它将制冷剂循环系统、冷却水管、冷却系统的所有部件安装为一体，省掉冷却水及室外凉水塔装置，机组露天安放，无需机房。机组采用电脑自动控制，无需专业人员监护。模块化冷...     

低温工艺热流体的分级冷却及控制研究

针对常规冷却方式和ORC发电冷却方式的缺陷,提出了低温工艺热流体的分级冷却系统;以某煤制油过程中的低温热流体工况为研究对象,计算了分级冷却系统的能耗情况,并与常规冷却方式和ORC发电冷却方式的能耗进行了对比,结果表明:分级冷却系统在工艺热流体冷却过程中,相比常规冷却方式,不仅不消耗额外的电能和水资源,反而产生发电收益,并且其发电功率远大于发电冷却方式的发电功率;最后,提出了低温工艺热流体分级冷却系统的控制方法。     

DAM两相闭式热虹吸回路冷却系统实验研究

两相热虹吸回路由于较高的散热性能在高功率电子设备冷却领域有较好的应用前景。为了解决四通道数字阵列模块的冷却问题,本文设计了一套两相闭式热虹吸回路冷却系统样机并对系统启动特性、充液量和工作倾角对系统散热性能的影响进行了实验研究。研究结果表明,样机系统结构及散热性能满足指标要求,启动性能和工作性能良好。此外,该系统对热耗1600 W、局部热流密度接近100 W/cm~2的组件的冷却效果良好。     

Experimental study on the double-evaporator thermosiphon for cooling HTS (high temperature superconductor) system

A cryogenic thermosiphons is an efficient heat transfer device between a cryocooler and a thermal load that is to be cooled. This paper presents an idea of thermosiphon which contains two vertically-separated evaporators. This unique configuration of the thermosiphon is suitable for the purpose of cooling simultaneously two superconducting bearings of the HTS (high temperature superconducting) flywheel system at the same temperature. A so-called double-evaporator thermosiphon was designed, fabricated and tested using nitrogen as the working fluid under sub-atmospheric pressure condition. The interior thermal condition of the double-evaporator thermosiphon was examined in detail during its cool-down process according to the internal thermal states. The double-evaporator thermosiphon has operated successfully at steady-state operation under sub-atmospheric pressure. At the heat flow of 10.6 W, the total temperature difference of the thermosiphon was only 1.59 K and the temperature difference between the evaporators was 0.64 K. The temperature difference of two evaporators is attributed to the conductive thermal resistance of the adiabatic section between the evaporators. The method to reduce this temperature difference has been investigated and presented in this paper. The proper area selection of condenser, evaporator 1, and evaporator 2 was studied by using thermal resistance model to optimize the performance of a thermosiphon. The superior heat transfer characteristic of the double-evaporator thermosiphon without involving any cryogenic pump can be a great potential advantage for cooling HTS bulk modules that are separated vertically.     

Experimental investigation on the detachable thermosiphon for conduction-cooled superconducting magnets

A detachable thermosiphon, as a transient thermal switch for conduction-cooled superconducting magnet, is designed, fabricated and tested. A thermosiphon between the first and second stages of a cryocooler can reduce the cool-down time of a conduction-cooled superconducting magnet by using the large cooling capacity of the first stage. The thermosiphon is a very efficient heat transfer device until all the working fluid in it freezes (off-state). After the working fluid freezes and the second stage temperature becomes lower than that of the first stage, however, the thermosiphon then becomes a conduction heat leak path between two stages of the cryocooler. Considering a very small cooling capacity of the second stage of the cryocooler around 4.2 K, the conduction heat loss is not negligible. Therefore, a detachable thermosiphon, made of a metal bellows, is considered to be able to eliminate such a conduction heat leak. The mock-up magnet is cooled down with the thermosiphon and the thermodynamic states of the thermosiphon and the mock-up magnet are precisely examined during the whole cool-down process. At off-state, the thermosiphon is detached mechanically from the magnet. In this way, the conduction heat leak path through the thermosiphon wall is completely eliminated. This paper describes the detailed transient operation of the detachable thermosiphon using nitrogen as the working fluid.     

用于环形正负电子对撞机探测器超导磁体的小型氦虹吸回路实验与数值模拟研究

在探测器超导磁体的低温系统预研中,搭建了小型的氦虹吸冷却回路实验系统,进行了气-液两相沸腾和传热特性实验研究,并利用VOF多相流模型模拟计算了氦的热虹吸自然冷却循环过程和过热烧干过程。在相同条件下,模拟计算结果与实验数据进行了比较,模拟计算得到的的温度分布、璧面过热度与实验测量数据符合度较好。     

Thermosiphon cooling of superconducting field windings in a cryoturbogenerator

Cooling systems for superconducting field windings of cryoturbogenerators are examined from the standpoint of cryostabilization. Several possible designs based on the thermosiphon effect are considered and the most promising system is selected. The calculation method for an open-circuit thermosiphon is developed, which gives good agreement with experimental results. It is shown that cryostabilization of superconducting windings is possible under certain conditions, which provides very high reliability of the cryoturbogenerator operation.     

氧压机油冷却器内漏使冷却水中油含量超标的处理

氧压机油冷却器内漏将导致冷却水中油含量超标,一旦油进入空分系统,将引起主换热器堵塞故障。介绍2TYS100+2TYS76型氧压机在运行过程中油冷却器发生内漏的故障现象,分析故障原因,阐述对油冷却器的故障处理过程及循环冷却水系统残油的处理方法。     

Stationary analysis of a solar LiBr-H2O absorption refrigeration system

The present work describes the operation of a solar powered absorption cooling system. This solar cooling installation was designed in order to resolve the overheating problems of an existing solar field. Since 2007 the system was completely monitored to be able to analyze it. The work evaluates the performance of this kind of installation as well as the behavior of the absorption chiller focusing on its steady state operation.This methodology was applied to the monitoring results of the installation in order to compare the first two years of operation of the system. It is concluded that the performance of the chiller showed better values in 2007 because the heat rejection temperature and the outdoor temperature were more favorable than in 2008. Nevertheless, the coefficient of performance (COP) achieved acceptable values in both periods, over 0.5, being the average chilling capacity between 3.6 kW and 5.8 kW.     

户式集中空调系统安装施工中常见问题及其对策

现今户式集中空调系统多运用于大面积住宅或商铺中,即以此新兴的小型集中空调系统为讨论对象,提出了户式集中空调系统中常见故障和问题,并概括性分析了导致故障的安装施工原因。此外结合户式集中空调系统中常见的容易导致故障的施工问题,按照户式集中空调系统的不同分类,分别论述了水系统、风系统和冷媒系统中冷凝水管、冷冻水管的设置和保温施工时的注意事项,以及室内机和室外机的安装设置时的注意事项,以便于施工人员参考,提高施工质量,确保日后空调系统运行稳定、高效和节能。     

Performance results of solar absorption cooling installationRésultats de la performance d'une installation frigorifique solaire à absorption

This paper describes a solar absorption cooling system and its performance for an office building having an occupancy of 7 h per day. The absorption system of 40 RT cooling capacity (installed) uses 300 m² of flat plate collector area and an oil-fired supplementary thermal energy source. The system produces > 10 000 kWh cooling per month. Considering the parasitic electric energy needs and the electrical energy equivalent of make-up water consumed in the energy rejection subsystem, the solar cooling installation saves 25–40% per day of electrical energy when compared to an equivalent cooling capacity conventional cooling system.