技术中心

【英文篇名】 Energy saving from variable flow operation of a heating system with heat metering 【作者中文名】 田雨辰; 涂光备; 【作者英文名】 By Tian Yuchen and Tu GuangbeiTianjin University; Tianjin; China; 【作者单位】 天津大学; 【文献出处】 暖通空调, Hv 离心水泵; 相似定律; 等效率曲线; 变频水泵; 控制方式; 输配管压; 损曲线; 【英文关键词】 variable flow; centrifugal pump; law of similitude; constant efficiency curves; frequency-controlled pump; control method; distribution piping loss curve; 【摘要】 阐述了循环水泵变频调速的节能原理,提出离心水泵相似定律的适用性和等效率曲线概念。通过提出输配管压损曲线概念,从理论上分析了计量供热变流量系统循环水泵常用的恒扬程控制和恒定最不利环路压降控制两种方案,认为恒定最不利用户资用压力方案节能效果较好。 【英文摘要】 Presents the energy saving principle of a frequency-controlled pump and points out the applicability of the law of similitude for centrifugal pumps and the conception of constant efficiency curves. By citing distribution piping loss curve, analyses the two commonly used control methods of constant pump head and constant remote circuit differential pressure and considers that control with a constant remote circuit differential pressure is the better.