变流量压差控制的节能分析与探讨  

Analysis of Energy-saving of Pumps in Variable Water Volume System under Pressure Difference Control

作　　者：李彬[1] 肖勇全[1] 王士兵 马秀力[1] 

机构地区：[1]山东建筑工程学院热能工程学院,山东济南250101 [2]山东华兴企业集团总公司,山东济南250014

出　　处：《制冷空调与电力机械》2006年第5期21-24,共4页Refrigeration Air Conditioning & Electric Power Machinery

基　　金：北京市重点试验室开放课题资助(KF200415)

摘　　要：从理论上分析了压差控制方式的原理、控制特点及应用场合,建立了相应的数学模型。认为：由于压差设定值采用末端支路设计负荷下的压差值,因而系统运行可靠；压差设定值越大,系统的节能率越小,循环水泵在高效区内的变频范围越小,反之亦然；系统的节能效果还受变频器效率、电机效率、水泵效率及负荷分布的影响；采用变压差控制可减少阀门的节流损失,具有更好的节能效果。Principles,characteristics and application situation of pressure difference control were analysed theoretically. Mathematical models of the control method were established. Conclusions are drawn that system is credible for applying the pressure difference value under design condition as control value;The more the pressure difference value is,the less the energy-saving rate is and the less scope of high efficiency of variable pump is,and vice versa. The energy-saving effects are influenced by the efficiency of transducer, motor, pump and distribution of load;Applying variable pressure difference control can reduce throttle loss and achieve better energy-saving effect.

关 键 词：定压差 节能 控制 水泵 变压差 

分 类 号：TU831.4[建筑科学—供热、供燃气、通风及空调工程]