多级离心式压缩机并机启停优化及热回收分析

Start-Stop Optimization and Heat Recovery Analysis for the Multi-Stage Centrifugal Compressor in a Parallel System

为了实现大功率压缩机组运行的节能降耗,从压缩机启停控制角度提出了一种多级离心式压缩机优化并机启停方法。通过建立功耗及级间换热模型,对多级离心式压缩机的并机运行能耗及各级能耗进行了仿真模拟,得到了并机调节最低能耗理论下的启停调节方式,并对该控制策略下的热回收进行计算分析。结果表明:离心式多级压缩机并联运行时,通过优化启停运行,余热回收相应下降,但压缩机电耗显著降低,较传统调节可以获得更好的节能效果。

To reduce energy consumption in the operation of high-power compressors,an optimized method of start-stop regulation for the multi-stage centrifugal compressor in a parallel system is proposed.By establishing power consumption and heat transfer models between stages,the total parallel operation energy consumption and energy consumption of various stages of multi-stage centrifugal compressor are theoretically investigated.The start-stop regulation mode based on the minimum energy consumption theory is obtained.In addition,the heat recovery under the control regulation is also analyzed.Our results show that when the multi-stage centrifugal compressor in a parallel system runs with the optimized start-stop regulation,the power consumption can be significantly reduced,and the waste heat recovery decreases correspondingly.It means that better energy-saving effect is achieved than conventional operation.