Can Bubbling Air Through Water Control Relative Humidity and Temperature?

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SUMMARY

Bubbling air through water can achieve 100% relative humidity, contingent upon the volume of water and the temperature of the water. Rob is utilizing a compressed air tank, regulator, and flow meter to control the flow rate of air. By heating the water, he can increase the moisture content in the air, and subsequently, further heating the air in the outlet pipe allows for adjustment of humidity levels. Understanding the mass transfer equations related to the Schmidt number and Reynolds number is essential for optimizing this process.

PREREQUISITES
  • Understanding of mass transfer principles, specifically the equations for mass transfer to a sphere.
  • Familiarity with the Schmidt number and its implications in fluid dynamics.
  • Knowledge of the Reynolds number and its role in characterizing flow regimes.
  • Basic principles of humidity control and thermodynamics.
NEXT STEPS
  • Research the equations for mass transfer to a sphere in relation to gas-liquid interactions.
  • Study the effects of the Schmidt number on mass transfer efficiency in humidification processes.
  • Explore the relationship between the Reynolds number and flow characteristics in tubing systems.
  • Investigate methods for controlling humidity and temperature in gas streams using thermal management techniques.
USEFUL FOR

This discussion is beneficial for engineers, HVAC specialists, and anyone involved in humidity control systems or thermal management in gas applications.

Thorny
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Hi,

I am trying to provide a humid air stream along some ¼” tubing, where I can roughly control the relative humidity and temperature, this doesn't need to be exact.

I already have a compressed air tank, regulator and flow meter to provide the correct flow rate.

I need to find out whether bubbling air through water will result in 100% relative humidity and whether or not this depends on the the amount of water it is bubbled through?

If so I can heat the water to get the right amount of moisture in the air at 100% humidity and then heat the air further in the outlet pipe in order to lower the humidity to the level I require.

Please excuse my ignorance as I do not have an extensive knowledge of this subject, any help or guidance you can give me will be greatly appreciated.

Cheers,
Rob.
 
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Use the equations for mass transfer to a sphere in terms of the Schmidt number and Reynolds number.
 

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