What does Nm3/h mean?
Thread Content
How should we read Nm3/h? What does it mean? If converted to m3/h, what is it? Under what circumstances should the Nm3/h unit be chosen?
Nm3/h means the standard per hour, which refers to the volume flow rate under standard conditions. The conversion into m3/h is related to the working conditions, such as pressure and temperature. Generally speaking, the flow rate of the system is expressed in square meters, because the working conditions of each point in the system may be different. If expressed in m3/h, the values will definitely be different, which is of little significance.
This post was last edited by hzlsdu on 2011-2-25 15:09 Standard cubic hour refers to the volume flow rate under standard conditions, usually m3/h is measured on site, and temperature and pressure compensation calculations are performed by measuring pressure and temperature on site and converted into Nm3/h
N means Biao Kuang...
Nm3/h means the standard per hour, which refers to the volume flow rate under standard conditions. Generally, when the flow meter leaves the factory, the measuring range is calibrated under standard conditions. Therefore, when selecting a measuring flow meter based on the flow conditions of the actual working conditions, it is necessary to convert the actual working condition flow into the standard condition flow, and then select the flow meter.
Supplement 2nd floor: There are two standard conditions, one is 1atm, 0℃, and the other is 1atm, 20℃.
Reply 1# Turbidity curtain is the standard volume flow unit of gas. pV=nRT p is the gas pressure in Pa. V is the gas volume in m3. n is the amount of gas substance, the unit is mol, T is the system temperature, the unit is K, R is the proportion coefficient, the value is different under different conditions, the unit is J/(mol·K) According to the above equation, the same amount of gas has different volumes at different temperatures and pressures. Nm3/h represents the gas volume flow rate measured at 20°C and a standard atmospheric pressure.
Standard square per hour is a unit of volumetric flow.
Supplement 6th floor: Internationally, the standard atmospheric pressure is used at 0 degrees Celsius, while my country uses the standard atmospheric pressure at 20 degrees Celsius. In addition, Nm3/h is a volume flow unit, which represents standard cubic meters per hour. It can be converted to cubic meters. The specific conversion must be carried out according to standard conditions, that is, the temperature and pressure under standard conditions are selected.
The bid price per hour means that we rarely use this unit here. The working conditions are constantly changing, so I personally feel that it does not mean much!
In my impression, it is the abbreviation of the word Norm.