Why does non-condensable gas in steam accumulate at higher points
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The issue of non-condensable gas discharge in steam systems: if the non-condensable gas is air, installing a high-point vent valve will definitely ensure that the air is removed? Air is denser than water vapor; why is it released from higher points?
Is air denser than water vapor? That’s not right, is it?
According to the data sheet, the density of air at normal pressure and 100 degrees is 0.946, while the density of water vapor at an absolute pressure of 100 kPa is approximately 0.58961
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In the balanced phase state, the gas phase should be on top. For example, our drum always serves to separate vapor from liquid, and the upper part of the pipeline functions similarly to a small drum.
The upper part of the pipe resembles a small steam drum; under phase equilibrium conditions, the vapor phase is always located at the top.