HVAC 风量调不平,别只盯着风口开度

HVAC commissioning 时遇到过一套 VAV 系统风量怎么都调不平。现场一开始一直调 diffuser damper,结果这个房间好一点,隔壁又偏了。后来我和 TAB 技师一起查,发现上游静压设定偏低,加上一个支管 flexible duct 被压扁,末端再怎么调都不稳定。 我们先看 BMS trend,确认 supply fan、static pressure 和 VAV command 是否正常;再逐段检查 duct、fire damper、filter 和 coil 状态。修正压扁的软管后,把静压 reset 逻辑调回设计范围,再做 balancing。最后把风量数据和房间编号对应起来,避免以后维护人员只看到一个总表。 给同行的建议是,风量问题要从系统端往末端查。只调风口很快,但可能把问题藏起来。MEP 调试最好留下 trend 和照片,后面投诉冷热不均时能少猜很多。

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