动力分布式通风系统稳定性及其能耗分析

摘要

本文以某地下空间的通风系统为例,对未进行阻抗调节的动力集中式通风系统、设调节风阀调节的动力集中式通风系统、动力分布式通风系统的运行工况进行了模拟计算,并对比分析了系统阻力不平衡度、流量偏离系数(即稳定性)以及系统能耗.研究结果表明:动力分布式通风系统能够大大地降低系统水力失调度以及流量偏离系数,提高系统的稳定性.相对动力集中式通风系统而言,动力分布式通风系统在实际运行时无需调节,其节能率可达20％～ 30％.%The ventilation system in an underground space was selected as the object of study.Simulation was adopted to analyze the operational states of three ventilation systems including the power-centralized system without commissioning,the power-centralized system with commissioning,and the power-distributed system.The resistance disorder degree,flow-deviation coefficient and energy consumption of system were analyzed.The results indicate that the power-distributed ventilation system can greatly reduce hydraulic disorder degree and flow-deviation coefficient and improve system stability.Compared with the energy consumption of the power-centralized system,the power-distributed system can save 20％ ～30％ energy.