Why use square units?
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Hello, experts. I would like to ask why the unit of flow rate for media such as oxygen or flue gas is always cubic meters per hour (Nm3/h). When calculating the mass flow rate, does one need to convert this value to cubic volume first and then multiply by density, or can one simply use cubic meters per hour multiplied by density?
The molecular weight M of the gas can be determined from its gas composition, and the mass flow rate is calculated using the molecular weight and the standard cubic meter flow rate. For example, if the molecular weight M is 32, then 22.4 cubic meters equals 32 kg.
The molecular weight M of the gas can be determined from its gas composition, and the mass flow rate is calculated using the molecular weight and the standard cubic meter flow rate. For example, if the molecular weight M is 32, then 22.4 cubic meters equals 32 kg.
Because the actual volume also changes when pressure and temperature change, it is very troublesome to adjust the operating conditions, and calculations are required as well. And calculating the square root adjustment is relatively simple
For ease of calculation, the temperature affects the volume of gases; however, the volume is constant under standard conditions. Additionally, the concentration of pollutants in flue gas is also based on standard conditions, so it is necessary to convert the oxygen content. Therefore, gases are generally calculated using standard conditions.