The phrase "air quantity" is correct and usable in written English.
It can be used in contexts related to engineering, HVAC systems, or environmental science, where the measurement or flow of air is being discussed.
Example: "The air quantity in the ventilation system must be adjusted to ensure optimal airflow throughout the building."
Alternatives: "airflow rate" or "volume of air".
The model also explains the prediction of air quantity depending upon the quality of intake air to the stopes.
The fan operation frequency is adjusted by the method of air adjustment change with methane emission quantity and the curve searching method after determining air quantity requirements.
Therefore, prediction of air quantity is the vital component for planning and designing of ventilation systems to minimise the radiation exposure of miners in underground uranium mines.
Demand Control System (DCV) is designed to optimise the energy consumption with respect to the demand of outdoor air quantity based on the number of people indoors.
Moreover, a mathematical relationship has been established for quick prediction of air quantity to achieve the desired radon daughter concentration in the mines.
The objective is to set the minimum fresh air quantity which is a function of the indoor pollutant concentrations rather than metabolic carbon dioxide.
In industrial and commercial applications where higher humidities and temperatures can be tolerated for part of the time, and where large air quantities are acceptable, outside air treated in an adiabatic spray may be supplied to the space to relieve high temperature conditions during summer months.
The variables usually include air quantities, regulator pressure losses and fan pressures.
The air quantities in each branch in both cases for each scenario are shown in Fig. 2.
Although regulators are installed in mine ventilation networks to control the distribution of air quantities among airways, they may increase the total pressure in the network.
Thus, a good mine ventilation design has an adequate number of regulators installed to deliver the pre assigned values of air quantities (Wang et al. 1985).
