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Explanation: First the hydrodynamic resistance is calculated along with the volume of air
passing. On substitution in the formula gives the head of air inside the machine
The fundamental relationship for the design of ventilation systems is captured in the formula Q = ACH x V, where:
– Q represents the airflow rate (how much air is cycled through the space in a given period, typically measured in cubic feet per minute (CFM) or cubic meters per hour),
– ACH stands for Air Changes per Hour (the number of times the air within a specific space is replaced),
– V signifies the volume of the space being ventilated (measured in cubic feet or cubic meters).
This equation is crucial for ensuring appropriate ventilation in a space, affecting air quality, comfort, and compliance with health and safety standards. It enables designers and engineers to calculate the necessary airflow to achieve the desired rate of air changes, ensuring sufficient removal of contaminants and provision of fresh air.