What is the expected outcome of using an isothermal humidifier?

What is the expected outcome of using an isothermal humidifier?

• A. The air temperature remains nearly constant while steam is injected.
• B. The air temperature increases as steam is injected.
• C. The humidity increases without changing temperature.
• D. The system requires additional cooling to maintain temperature.

Answer: (A)

Isothermal humidification adds moisture to the air without changing the dry-bulb (air) temperature. This type of humidifier introduces steam at about the same temperature as the airstream, so the latent heat released when the water vapor condenses does not produce a noticeable rise in air temperature. The result is that the air temperature stays essentially constant while humidity increases as steam is added. This is why the defining outcome is maintaining a nearly constant temperature even as moisture levels rise. Optionen that imply heating or the need for extra cooling don’t reflect the isothermal behavior.

Isothermal humidification adds moisture to the air without changing the dry-bulb (air) temperature. This type of humidifier introduces steam at about the same temperature as the airstream, so the latent heat released when the water vapor condenses does not produce a noticeable rise in air temperature. The result is that the air temperature stays essentially constant while humidity increases as steam is added. This is why the defining outcome is maintaining a nearly constant temperature even as moisture levels rise. Optionen that imply heating or the need for extra cooling don’t reflect the isothermal behavior.