单缸柴油机散热器冷却系统的设计研究

小功率单缸柴油机的水冷却系统有蒸发式和散热器自然循环式,散热器自然循环冷却与蒸发冷却相比,具有结构紧凑,冷却效果好、耗水量少等特点.随着柴油机向轻量化、高强化方向发展,也要求冷却系统在较小的散热面积下获得良好的冷却效果.本文通过对新开发的单缸柴油机冷却系统的设计,研究散热器与风扇之间参数的匹配和相互影响,探讨适合于该形式冷却系统的设计方法.     

硅钢常化退火炉气-雾冷却技术及其特点分析

常化快冷是生产高牌号无取向硅钢和高磁感取向硅钢不可缺少的一个工艺环节,气-雾冷却则是实现常化快冷的关键方式之一。介绍了国内自主设计建设的常化酸洗机组气雾冷却系统的技术特性,并对其特点进行了系统分析,最后给出该系统在设计、运行参数的选择上若干注意事项,对气-雾冷却系统设计和使用具有一定的指导作用。     

285F直喷式风冷柴油机冷却系统设计

论述了２８５Ｆ直喷式风冷柴油机的冷却系统设计，剖析了冷却系统的总体布置，风扇设计，冷却风量分配与相关零件设计，并通过受热零件温度场的测定和分析，对冷却系统的设计作了评价。     

装载机冷却系统控制装置设计与试验研究

设计了装载机冷却系统控制装置,将发动机冷却系统和液压油冷却系统分开布置,发动机冷却系统采用液力驱动,液压油冷却系统采用电机驱动,两冷却系统的风扇和水泵转速都由单片机控制,实现了冷却系统冷却能力的自动调节.液压油冷却系统采用晶闸管相控调压调速系统,建立了其控制模型.将此控制装置在ZL-50装载机进行了试验研究.结果表明:该控制装置可有效解决装载机发动机水温和液压油温同时过高的问题,还可将预热时间减少50%,预热阶段节约燃油43%.     

高强化柴油机冷却系统电控化设计仿真及试验研究

针对传统冷却系统与柴油机冷却需求不匹配的问题,进行了冷却系统电控化设计仿真研究。基于Simulink软件设计了电控冷却系统仿真模型,提出了电控冷却控制策略,并开展了变柴油机工况条件下电控冷却控制策略验证仿真。对传统冷却部件进行电控化改造（电控海水泵、电控淡水泵和电子节温器）,搭建电控冷却系统试验台架,通过试验分析了电控冷却对柴油机耗油率和热平衡的影响,结果表明：相对于传统冷却系统,电控冷却系统在900 r/min、负荷率30%,1 200 r/min、负荷率60%,1 500 r/min、负荷率90%这3个工况点的耗油率分别降低9.4 g/（kW·h）、6.8 g/（kW·h）和3.9 g/（kW·h）,燃油经济性和热量分配得到改善。     

燃气轮机进气冷却系统研制

燃气轮机的性能受到环境温度的影响,高温时其出力随进入燃机的空气温度升高而降低的问题可通过进气冷却来解决.提出了一种燃气轮机进气冷却系统的设计方案,介绍了一种双工况燃气轮机进气冷却系统以及使用西门子工控软件WinCC与STEP7对监控系统的设计.运行结果表明,该进气冷却系统具有显著的经济效益.     

感应加热炉闭式冷却循环系统的应用

通过分析铝型材挤压成型的特点，介绍了铝棒感应加热炉闭式循环冷却系统的设计思路。针对实施过程中遇到的感应线圈堵塞以及绝缘等问题总结出合理的解决方案，从而提高该设备的稳定性和安全性。     

夏热冬暖地区空调冷凝水雾化冷却应用

通过对夏热冬暖地区空调冷凝水的产水量、水温以及水质分析,得出空调冷凝水回收应用于雾化冷却系统具有可行性;并指出空调冷凝水雾化冷却系统的主要设备选型设计方法和系统控制策略;最后搭建试验台验证空调冷凝水雾化冷却系统的节能效果。     

大功率晶闸管的冷却技术

简要介绍了晶闸管各种冷却方式的特点、原理及其发展现状。认为浸泡式蒸发冷却具有不可比拟的优越性和很好的发展前途。由于浸泡式蒸发冷却要用完全密闭形式,导致系统内部压力在真空到0.3MPa之间波动。而大型冷却容器作为压力容器受到法律限制,因此严重影响了它的发展。鉴于此,提出了恒压浸泡式蒸发冷却系统,并对其特点及原理做了简单分析。     

动力电池组复合冷却系统优化及实验研究北大核心CSCD

为解决动力电池组温度过高和不均匀的问题,设计了复合相变材料与液冷结合的复合电池冷却系统,研究不同参数对动力电池复合冷却系统性能的影响。多因素正交设计计算结果显示,冷却液入口温度为20℃,入口流速为3 m/s,通道直径为7 mm时,系统达到最佳的冷却性能。实验结果表明,在常温(25℃)和高温(40℃)环境下,与单一相变冷却系统相比,复合冷却系统具有较好的环境适应性。     

Cooling System Design

Cooling water systems and refrigeration systems are required to provide cold utility to chemical processes. Little attention has been placed on the structure and system interactions between cooling systems and processes. In this article, an integrated design and retrofit method for cooling systems is reviewed. For cooling water system design, a new design methodology has been developed for debottlenecking of cooling water systems. Reuse of cooling water between different cooling duties enables cooling water networks to be designed with series arrangements. This allows better cooling tower performance and increased cooling tower capacity. The interactions between the performance of the cooling tower and the design of cooling water networks are explored systematically. For refrigeration system design, a systematic design and retrofit method has been proposed for refrigeration systems using pure or mixed refrigerants. A graphical exergy analysis method, the z -H diagram, is introduced to help engineers obtain understanding and insights into complex refrigeration systems. The systematic synthesis method proposed in this article can greatly improve operating efficiency for refrigerant systems.     

高性能柴油机冷却系统设计与分析

以热力学分析和流体动力学分析结果为依据,阐述了一款高性能柴油机冷却系统的设计理念和方法。介绍了主要冷却部件的设计特点和结构型式,并给出了详细的冷却系统流程。该系利用高、低温冷却水的综合效果,为整机实现高强化度、低运行成本和低碳环保目标起保障作用。     

Effect of cooling system on the polymer temperature and solidification during injection molding

Cooling system design is of great importance for plastic products industry by injection molding because it is crucial not only to reduce molding cycle time but also it significantly affects the productivity and quality of the final product. A numerical modeling for a T-mold plastic part having four cooling channels is performed. A cyclic transient cooling analysis using a finite volume approach is carried out. The objective of the mold cooling study is to determine the temperature profile along the cavity wall to improve the cooling system design. The effect of cooling channels form and the effect their location on the temperature distribution of the mold and the solidification degree of polymer are studied. To improve the productivity of the process, the cooling time should be minimized and at the same time a homogeneous cooling should be necessary for the quality of the product. The results indicate that the cooling system which leads to minimum cooling time is not achieving uniform cooling throughout the mould.     

内燃机车干式冷却水系统研究试验

介绍以DF4C型机车为基型,进行干式冷却水系统及其主要部件的研究设计、性能试验的情况,其结果对于干式冷却水系统在国产内燃机车上的装车运用,提高内燃机车冷却技术,具有一定的意义。     

满足排放法规的发动机冷却散热规律的研究

以满足发动机日益严格的排放法规的要求和进程为基本目标,基于发动机热平衡的结果和分析,对冷却系统的冷却器组件(水散热器,中冷器和机油冷却器)所需要的设计散热量做了调查和研究,得出了一些可用于分类比较、定量(在调查范围内)的经验统计规律和趋势。且已经尝试、成功用于指导冷却器的参数确定和研制,具有实用意义。继续跟踪发展,扩大范围、积累和更新规律,将有利于公司的冷却器产品设计生产尽快实现与现代发动机的同步和优化发展,更好的满足国内外客户要求。     

吸湿供冷系统的空气处理方式分析

温度和新风量的大小在影响室内环境的舒适性方面起着重要的作用。为了改善室内空调环境，ASHRAB规定设计温度应该保持在30％-60％之间，且需要把原有的设计新风量增大2倍至4倍。显然，降低温度和增大新风会加大空调的冷负荷，传统的空调供冷系统在满足上述条件方面显示出了自身的一些缺点。吸温供冷系统把除温和冷却降温供冷解耦分开处理．不但能把空气温度处理到一个比较低的程度，而且在节能方面也显示出很大的潜力。对吸温供冷系统的几种空气处理方式进行了分析和比较，从而可根据不同的情况为吸温供冷系统的使用选择比较理想的空气处理方式，以达到节能目的。     

集中式循环冷却水系统能量分析

针对火电厂、石化等大型及特大型企业的冷却水用水量消耗巨大的问题,分析了集中式循环冷却水系统的能量。为提高循环冷却水系统内的能量利用效率,在现阶段循环冷却水系统流行的两种设计方法即按水泵扬程最小化和按基建投资最优的基础上,提出了利用水动风机冷却塔和生态小水电两种冗余能量回收改造法;为便于直观比较各设计方法的节能效果,提出了冗余能量系数λ,提供了一种工业循环冷却水系统设计方法的选择标准。     

Design and simulation of a new energy conscious system, (basic concept)

A new passive cooling and heating system is introduced in this paper. The system was designed to be adaptively, integrated into the fabric and layout of buildings in North Africa. After discussion of the passive thermal design principles, a number of traditional and modern passive cooling and heating strategies are reviewed and analysed. Lessons learned from these examples have greatly helped design the new system. Development of the new system was based on both architectural design and principles of building engineering.     

Multi-parameter influence on combined-hole film cooling system

Combined-hole film cooling system is a promising way to improve cooling efficiency of gas turbine. New combined-hole systems, such as double-jet [14], anti-vortex design [16] and NIKOMIMI [15] are developed to overcome the kidney vortexes. Round-hole and double-jet, which are typical in design of combined-hole film cooling system, are investigated in this study experimentally and numerically. It is observed that the anti-kidney vortexes produced in double-jet film cooling system are controlled by the pitch and compound angle of the two holes. The pitch of double-jet unit determines the formation of anti-kidney vortexes led by the interaction between two vortexes, while the compound angle affects the strength of each branch of anti-kidney vortexes. Being two of the most important factors for film cooling of gas turbine, blowing ratio and density ratio, vary in degree of influence on film cooling effectiveness, and the key point is whether the cooling gas has blown off from the surface. It is possible to achieve high film cooling effectiveness with a combined-hole system when the geometry parameters, (compound angle, pitch, etc.), and aerodynamic parameters, (blowing ratio, density ratio, etc.) match well on local flow structure.