描述
空调系统的控制主要分为继电器控制系统、直接数字式控制(DDC)系统和可<a>编程序控制器(PLC)系统等级几种。由于故障率高、系统复杂、功耗高等明显的缺点,继电器控制系统已逐渐被淘汰。DDC控制系统虽然在智能化方面有了很大的发展,但由于其本身抗干扰能力差、不易联网、信息集成度不高和分级分步式结构的局限性,从而限制了其应用。相反,PLC控制系统以其运行可靠、使用维护方便、抗干扰能力强、适合新型高速<a>网络</a>结构等显著的优点,在智能建筑中得到了广泛的应用。为了提高空调系统的经济性、可靠性和可维护性,目前空调系统都倾向于采用先进、实用、可靠的PLC来进行控制[3]。
本文介绍和利时公司永宏PLC在水源热泵空调控制系统中的成功应用,说明了永宏PLC可以很好地实现中央空调智能化控制,达到减少无效能耗、提高能源利用效率和保护空调设备的目的。
2、空调系统介绍
厦门市某单位的办公楼采用水源热泵中央空调系统,总建筑面积8550m2,建筑高度20.5m,其中空调面积约6840m2。地下1层为各种设备房和操作间,地上1层为职工食堂、大厅和会议室,地上2~6层为商业办公用房。
室内温度和相对湿度等技术参数的设计要求如表1所示。水源热泵中央空调系统的设计制冷量为860kW,制热量为950kW。空调的主机系统由四台压缩机组成,水源水系统由取水井、渗水井和水处理设备组成。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。
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