Standard cubic meters for gases
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The unit we use for measuring gas flow in our devices is standard cubic meters per hour, as the volume of gas changes with temperature. If, under constant other conditions, the gas flow rate is a at a temperature of T1, then this flow rate becomes b when the temperature rises to T2. My question is: if both values are converted to standard cubic meters per hour, that is, if both a and b are converted to this unit, then shouldn’t the resulting value be larger than that corresponding to a? If that is the case, then in actual operation, should the value displayed on the DCS not decrease as the temperature rises? Should the gas volume flow rate indicated by the instrument, in standard cubic meters per hour, also decrease at that time?
As the temperature rises, the DCS shows an elevated flow rate. Assuming there is no temperature compensation, the flow rates displayed by the DCS are converted to standard values based on the design temperature. If the actual temperature rises, the measured volumetric flow rate will be higher; however, since the DCS does not take this increase in temperature into account when converting to standard values, the calculated standard value will definitely be too high.
This post was last edited by LYshihua on 2016-10-26 at 15:19. From a qualitative perspective using the ideal gas law, I understand it. So in that case, does that mean the mass flow rate will be lower?