Calculate RH of moist air at higher temp ranges accurately?

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SUMMARY

The discussion focuses on calculating the relative humidity (RH) of moist air at higher temperature ranges, specifically beyond 100°C. The user employs the Magnus relation but notes its limitations and seeks alternative methods for accurate RH calculation. Suggestions include using psychrometric charts, although existing charts typically only extend to 55°C. The conversation emphasizes the need for reliable tools or methods for engineers working with high-temperature applications.

PREREQUISITES
  • Understanding of the Magnus relation for humidity calculations
  • Familiarity with psychrometric charts and their limitations
  • Knowledge of wet bulb and dry bulb thermometer measurements
  • Basic principles of thermodynamics related to moisture in air
NEXT STEPS
  • Research advanced methods for calculating RH at temperatures above 100°C
  • Explore alternative psychrometric charts that cover higher temperature ranges
  • Learn about the use of digital hygrometers for accurate humidity measurements
  • Investigate software tools for thermodynamic calculations in high-temperature environments
USEFUL FOR

Engineers, meteorologists, and HVAC professionals who require accurate humidity calculations in high-temperature settings will benefit from this discussion.

abhya
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Calculate RH of moist air at higher temp ranges accurately?

Hey there :)
Im using the Magnus relation for calculating the RH of air (sat pressure the RH) only to find it works good only for temperature ranges upto 100°C (with corrections to original Magnus relation!)
Does anybody know a better method to calculate RH accurately (or thru Psychrometric charts-all charts I found have ranges upto 55°C only)??
Any help is welcome!
Thnx in advance :biggrin:
 
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wet bulb thermometer, dry thermometer and chart. Only way for the average engineer to do it.
 

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