The Application of Closed-loop Variable Air Volume Control System in Laboratory Ventilation System
Variable air volume control system is widely used in laboratory construction,which is helpful to improve the safety of the laboratory and achieve the goal of energy conservation and emission reduction.However,because the measurement of fume hood surface wind speed,laboratory static pressure difference,and pipeline static pressure is easily affected by factors such as sensor installation location and method,and airflow disturbance,it brings challenges to the design and application of the laboratory variable air volume control system based on closed-loop control method.Starting from the system control principles and performance influencing factors,this paper takes the application of variable air volume control system in a chemical laboratory as the research object,and uses numerical simulation method to verify the core parameters such as pressure distribution,velocity distribution and air age in the laboratory.The results show that the airflow organization optimized based on the performance influence countermeasure in the chemical laboratory is good,which meets the requirements of fume hood design and use and the laboratory chemical exposure control.
closed-loop controlvariable air volume control systemfume hoodlaboratory differential pressure controlconstant static pressure control
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