某实验室排风柜面风速控制现场影响因素分析
Analysis of field influence factors of fume hood inlet face velocity control
摘要：
通过对上海某测试中心的化学测试室进行排风柜面风速现场测试，并从实际面风速及面风速均匀程度两个方面进行分析，发现配置普通电通风阀的排风柜面风速控制受风阀开度、系统位置及柜内实验等因素影响，难以达到预期的控制效果，建议为排风柜配置可以进行面风速测量反馈的变风量排风控制阀，通过闭环控制保证面风速满足目标要求，并简化实验人员对排风柜的操作。
关键词：普通电动风阀,风阀开度,平均面风速,面风速偏差
Abstract：
Based on the spot test of the chemical laboratory in a Shanghai test center, analyzes the average face velocity and face velocity diversity, and states that the fume hood with motorized dampers cannot desirably meet the control requirement due to various damper opening position, system location and operation state involved. Recommends to equip the fume hood with VAV exhaust control valves with velocity measurement feedback for meeting the velocity requirement with the closed-loop control and simplifying the operation by the laboratory personnel.
Keywords:motorized damper, damper opening, average face velocity, face velocity deviation