摘要
为解决循环水系统由于水泵选型不当、工况调节方法不合理、管理不科学、能耗评估困难等原因造成的系统运行效率低下,能源浪费严重的问题,以某化工厂循环水系统为研究对象,通过现场对循环水系统设备安装情况和工厂生产周期内泵的运行工况进行调研,并与泵在变频调速运行下的能耗比较,找出节能空间,完成系统的能耗分析和评估.以泵的相似定理为理论基础,结合水泵单体节能和系统节能,制定基于供水泵站变频运行的循环水系统节能供水策略,在满足化工生产工艺需求的前提下实现循环水系统管网典型点的恒压供水.并总结建立一套基于泵外特性曲线、电动机负载特性曲线、循环水系统关键点工况数据的循环水系统能源调查方法.结果表明:该厂循环水系统按照节能改造后,通过对能耗的监测和推算,供水泵站年耗电量可由原来的2.1×105kW.h降为1.4×105kW.h,年节省电量近7×104kW.h,节电比例高达33%.
The cooling water circulation system is frequently subject to a low efficiency and a high e-nergy consumption caused from improper pump selection,unreasonable regulation of working condition,unscientific management of operation and difficulty in energy consumption evaluation.In order to reduce the energy consumption,the water circulation system in a chemical plant was used as an investigation model,then the situation of equipment installation and pump operation conditions during normal production period were surveyed.Comparing the existing energy consumption with that under a variable frequency speed regulation,the space for energy saving was identified;eventually,the analysis of assessment of energy consumption of the whole system was completed.An energy-saving water supply strategy,where a variable frequency speed regulation was utilized in the pump stations of the cooling water recirculation system,was established according to the pump affinity laws and by considering the energy-saving in the pumps themselves and their systems.Under the premise of meeting the chemical production process requirements,a constant pressure water supply was realized in the water recirculation pipe network.Moreover,a survey method for evaluating the energy consumption in a cooling water recirculation system was suggested based on pump performance curve,motor torque-speed curve and operation parameters in the key operation conditions of the system.After the cooling water circulation system was refurbished in that chemical plant,the annual electric power consumption in the plant was reduced to 1.4×105 kW·h from 2.1×105 kW·h,the saved power is around 7×104 kW·h,causing the power consumption was reduced by up to 33%.
出处
《排灌机械工程学报》
EI
北大核心
2012年第6期705-709,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
'十二五'国家科技支撑计划项目(2011BAF14B02)
国家杰出青年科学基金资助项目(50825902)
关键词
循环水系统
泵站
变频运行
能源审计
节能改造
cooling water circulation systems
pumping station
variable frequency operation
energy audit
energy saving reconstruction
作者简介
汤跃（1959-），男，江苏镇江人，研究员（tomt@ujs．edu．cn），主要从事泵系统运行优化和节能研究
马正军（1987-），男，江苏徐州人，硕士研究生（fenghuanglei007@126．com），主要从事泵站节能运行研究．
