水-水热力交换站DDC监控系统设计与参数优化
本科毕业设计（论文）
题 目 学生姓名 专业班级 学 号 院 （系）指导教师 完成时间
水-水热力交换站DDC监控系统设计与
参数优化
I
水-水热力交换站DDC监控系统设计与参数优化 摘 要
本论文所设计的热力交换站是为某单位冬季采暖供应，一次热源从市政热力管道取得，二次系统有循环水泵、补水泵、除污器等附属设备。本文介绍了热力交换站的监控系统的组成、功能和工作过程。设计所使用的换热方式是水-水换热，用对水循环温度的控制达到设计所要求的供热温度。通过热力交换站的室内温度的监测控制和对各参数的分析，达到热力交换站节能设计的要求。通过对循环水温度的控制达到冬季采暖供水所需的温度，用于提高室内空气温度。
本次设计通过对热交换站原有设备及环境进行分析，生成优化方案，在满足用户要求的基础上，达到优化控制和节能的目的。本文详细介绍了水-水换热站的设备构成及监控原理，附有监控原理图和DDC计算机监控图，并根据所需监控内容对相应的几种传感器执行器的监控方式进行了介绍。本设计要达到的目标，使单位冬季的集中供暖安全可靠，经济合理，使热交换的设计更加节能，降低消耗。
关键词 水-水热力交换站/传感器、执行器/DDC控制/参数优化
II
水-水热力交换站DDC监控系统设计与参数优化
Analysis and optimization of water - water heat exchange
station DDC control parameters
ABSTRACT
This thesis discusses standing control system is heat for the Unit of the winter heating supply.
the once heat source come from the municipal heat pipe, the Secondary system have circulating pump, water supply pump, decontamination and other ancillary equipment. This article describes the composition, functions and work processes of heat exchange station monitoring system. The heat exchanger of design uses water-water heat exchanger, using the control of the temperature of the water cycle to design the required heating temperature. Through monitoring and control the heat exchange station of indoor temperature and analysis of various parameters, achieve the energy-efficient design of the heat exchange station.
The design of heat exchange station original equipment and the environment, generate optimized programs on the basis that meet user requirements, to achieve optimal control and energy saving. The details of water - water heat exchanger station equipment and monitoring principle, attached to the monitor schematic and DDC computer monitor Figure, and introduced several sensors to carry out the monitoring required to monitor the content.
Keywords: water - water heat exchange station / sensors, actuators / DDC control / parameter optimization
III
水-水热力交换站DDC监控系统设计与参数优化 目 录
中文摘要 .............................................................................................................................................. II 英文摘要 ............................................................................................................................................. III 1.绪论 ................................................................................................................................................... 1 2.热力交换站的换热型式 ......................................................................................................... 2 2.1蒸汽-水型换热站 .......................................................................................................... 2 2.2水-水型换热站 ................................................................................................................ 4 3.热力交换站控制系统 .............................................................................................................. 6
3.1换热器 .................................................................................................................................. 9 3.2传感器与变送器 ........................................................................................................... 12 3.3 执行器 ............................................................................................................................... 16 3.4 控制器 ............................................................................................................................... 17 4.热力交换站水泵节能控制系统设计 ............................................................................ 19
4.1 循环泵节能设计 .......................................................................................................... 19 4.2补水泵节能设计 ........................................................................................................... 19 4.3 一级泵换热系统的监控 .......................................................................................... 21 4.4 次级泵系统的控制 .................................................................................................... 23 4.5 电机的调节 .................................................................................................................... 25 5.DDC控制系统简介 ................................................................................................................... 26
5.1工作原理 ........................................................................................................................... 26 5.2功能介绍 ........................................................................................................................... 26 5.3 DDC控制系统的网络结构 ...................................................................................... 27
水-水热力交换站DDC监控系统设计与参数优化 5.4 DDC控制系统的优点 ................................................................................................ 28 6.节能分析 ....................................................................................................................................... 30 7.结束语 ............................................................................................................................................ 31 致 谢 ............................................................................................................................................... 32 参考文献 ............................................................................................................................................ 33
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