1、用B5纸打印,上下边距分别是2.54cm,左右边距分别2.5cmThe system is based on The LiBr Refrigerators principle, running state, data parameters, exceptional alarm and so on, designed a smart monitoring system. The system can monitor, control, alarm, curved shape inquiry, printing forms and so on.Surveillance: The system wi
2、ll display the data, as well as refrigerator internal operation, audio-visual presentation of accurate monitoring of the interface at all. Refrigerator to simulate the system operation process, the realization of refrigerator storage of historical data may be based on customer needs, regular refrige
3、rator to preserve data, data query statements in support of print, and in accordance with rendering real-time data curve refrigerator.Control: The ability to set up monitoring systems interface to start or stop at the scene refrigerator, cold water pumps, cooling pumps, cooling tower fan and so on.T
4、he system is consist of LiBr Refrigerator, cold water pumps, cooling pumps, cooling tower fan, group control Counter. Operation of refrigeration units of the heat generated by the cooling water temperature, cooling water pump to the cooling water to cooling towers, cooling tower by the cooling water
5、 to cool down. Refrigerator cold water will be produced by the end of cold water supply to air-conditioning to provide a steady flow of cold water for users.Refrigeration unit is controlled by the Electric Control Cabinet, the system running the entire data adapter through the communications sent to
6、 the group control units for control of the operator to monitor the entire system. At the same time, group control of Taiwan in accordance with the refrigerator remote control can set the time automatically cease, or in accordance with the system load automatically cease. From the cooling tower fan
7、stopped by the PLC process automation, PLC in accordance with the temperature sensors detect the cooling water return water temperature, the temperature is divided into nine levels, temperature levels in each of the corresponding number of fans to start. At the same time, in accordance with the oper
8、ation of each typhoon time machine, automatic distribution of the shortest running time running fan priority in order to achieve each of the Typhoon aircraft operating time optimal control, to ensure equality of fan service life.小四号,Times New Roman;行距 固定值20;字间距 标准小四号,空1行LiBr Refrigerator摘要IAbstractI
9、I第一章 引言11.1 溴化锂制冷机简介11.1.1 溴化锂制冷机介绍11.1.2 溴化锂制冷机工作原理21.2 远程集中监控系统介绍3第二章 溴化锂制冷机远程集中监控系统概述32.1 监控软件介绍32.1.1 运转流程图42.1.2 实时数据显示42.1.3 状态报警显示52.1.4 实时曲线显示62.1.5 历史数据查询72.1.6 历史报警查询82.1.7 系统参数设置82.1.8 帮助信息92.1.9 退出系统102.2 操作指南102.2.1 软件的安装102.2.2 界面切换操作112.2.3 报警及处理方法112.2.4 制冷机数据查询12第三章 系统整体介绍133.1 系统总体
10、构成133.2 系统布线图143.3 监控软件简介143.4 通讯适配器控制系统控制概要153.4.1 概要153.4.2 特点153.4.3 接口定义一览173.4.4 控制盘回路图及外形图193.4.5 控制器按键及开关说明223.4.6 系统功能263.4.7 系统调试313.5三菱PLC程序介绍313.5.1 程序分析32第四章 现场安装及接线354.1 含操作台标准群控354.1.1 设备组成354.1.2 技术要求354.2 通信适配器的设置364.3 调试方法364.4 注意事项364.5 含触摸屏机组的设置36结论39致谢.39参考文献40附录:PLC部分程序清单41目录采取自
11、动生成的方式;目录中的章标题四号,黑体,居左;节标题小四号,宋体,较上一级标题左侧空3个字符;页码小四号,宋体1.1.1 溴化锂制冷机介绍节标题,四号,黑体,居左溴化锂制冷机简称溴冷机,是目前世界上常用的吸收式制冷机种。真空状态下,溴化锂吸收式制冷机以水为制冷剂,溴化锂水溶液为吸收剂,制取0以上的低温水,多用于中央空调系统。 溴化锂制冷机利用水在高真空状态下沸点变低(只有4摄氏度)的特点来制冷。(利用水沸腾的潜热)溴化锂的性质与食盐相似,属盐类。它的沸点为1265,故在一般的高温下对溴化锂水溶液加热时,可以认为仅产生水蒸气,整个系统中没有精馏设备,因而系统更加简单。溴化锂具有极强的吸水性,但溴
12、化锂在水中的溶解度是随温度的降低而降低的,溶液的浓度不宜超过66,否则运行中,当溶液温度降低时,将有溴化锂结晶析出的危险性,破坏循环的正常运行。溴化锂水溶液的水蒸气分压,比同温度下纯水的饱和蒸汽压小得多,故在相同压力下,溴化锂水溶液具有吸收温度比它低得多的水蒸气的能力,这是溴化锂吸收式制冷机的机理之一。正文中汉字、标点符号用小四号,宋体;英文和数字用小四号,Times New Roman;行距 固定值20;字间距 标准溴化锂制冷机需要热源来驱动,主要在天然气,柴油,煤油,水蒸汽,热水等,因此在电力供应不足的地区有较大的应用优势。溴化锂吸收式机组是一种以热能为驱动能源、以水为制冷剂、以溴化锂溶液
13、为吸收剂的吸收式制冷或热泵装置。它利用溴化锂溶液吸收和发生制冷剂蒸汽的特性。通过各种循环流程来完成机组的制冷、制热或热泵循环。 由于溴化锂吸收式机组可以一机三用既可以制冷、制热、生活用热水,驱动热能可以是天然气、柴油、热水蒸汽,因此在一些天然气产地地区、宾馆酒店、有余热余气的工厂等项目中因其运行费用相对电制冷设备底而得到广泛采用。 溴化锂吸收式机组系统为负压工作状况, 溴化锂溶液具有腐蚀性, 制冷剂运行一段时间后需要置换。溴化锂吸收式机组维保工作量相对要正文中的页码用阿拉伯数字,小五号,Times New Roman,底部,居中大。图3-5 系统布线图“图 3-5”表示第3章里的第5个图;小四
14、号,宋体空1行 群控台监控制冷机以及各个传感器的数据全部靠通讯实现,用两芯屏蔽通讯电缆将每一台制冷机的电控柜与远程操作台相连,把制冷机运转的所有数据打包定时发送到操作台一端显示记录。压力、流量传感器测得的数据传送到操作台的PLC中,数据经过转化整理后,显示在监控界面上。 1 王志梅。Visual Basic数据库应用M。 北京:科学出版社,20032 李中年。控制电器及应用M。北京:清华大学出版社,2006图书类示例3 孟朝霞,牛百齐。无刷直流电动机无位置传感器控制系统。机电工程J,2005年,第22卷第6期。66-71页期刊类示例4 胡邦南。基于KEELOQ跳码技术的密码发生器设计。汉字用五号,宋体;英文、数字用五号,Times New Roman