Thermal Radiation from a Liquid or Gas

AI Thread Summary
Calculating heat loss from gases or liquids involves complexities beyond simple blackbody radiation, leaning towards gray-body considerations. The total power radiated can be determined using the temperature-weighted blackbody curve and the spectrally-weighted emissivity. Additionally, conduction and convection also contribute to heat transfer, complicating the calculations based on geometry. Resources like Rohsenow & Hartnett may provide further insights into these processes. Understanding these factors is essential for accurate heat loss assessments.
radiatorguy
Messages
2
Reaction score
0
Hello,

I've been trying to find out how to calculate heat loss from a gas or liquid vs. temp. My understanding is that this is not a simple blackbody problem for a variety of reasons... guess it's more a gray-body problem. Have not been successful at finding papers or texts which deal with this specific issue. Are there simple ways to get approximate solutions to this problem or is this much simpler than I realize. Any insights or leads would be appreciated.

Thanks
 
Science news on Phys.org
Radiation heat losses are reasonably straightforward to calculate- the total power radiated is a product of the temperature-weighted blackbody curve with the spectrally-weighted emissivity, integrated over all wavelengths.

There can be other processes- conduction and convection- that cause heat transfer as well. Those can be much more complicated, depending on the geometry.
 
Rohsenow & Hartnett
 
Thanks for the help Andy and Bystander.
 
Back
Top