- The thermal radiation balance between CO2 with different concentrations can be tested using the experimental setup shown in the figure, or using gases with stronger radiation capabilities (artificially set concentration differences).
- The radiation intensity of CO2 with a concentration of 1mol is lower than that of 2mol, and the direction of radiation energy transfer is from right to left.
- Observe the differences between T1 and T2 in the experiment, as well as the differences.,
- This experiment can verify whether the second law of thermodynamics is effective for radiation, with low cost and significant significance.
Ah, another not well-thought through proof.
1) The main effect here will simply be non-radiative heat conduction via the glass and you have the classical first lecture scenario with systems in contact according to law 0.
2)Let's assume you take two glass shields with vaccuum in between. Then you still don't understand radiation physics: the Einstein coefficients for stimulated emission and absorption are the same (while spontaneous emission is much lower by orders of magnitude), so the higher concentrated chamber will not only emit more, but also absorb more in the same amount, so temperature equilibration will be the result.
Anyway, thanks for the brain jogging exercise.
This is the post I posted a few days ago, which can already solve this problem and is quantitative.
Radiation is joking with the Second Law of Thermodynamics, and scientists have been tricked. Below is a comparative description.
A--Output of the second law of thermodynamics
B--The experimental performance of radiation.
1A, Second Law of Thermodynamics: Heat cannot spontaneously transfer from low to high temperatures.
1B, thermal radiation: Low temperatures can radiate to high temperatures, while high temperatures can radiate to low temperatures.
2A, scientists bet on the heat transferred by radiation: q (T1_to_T2)>q (T2_to_T1), where T1>T2
2B, actual intensity of thermal radiation:
q (T1_to_T2)=q (T1, n1); Q (T2_to_T1)=q (T2, n2)
n1, n2- Number of internal radiation structures of heat sources 1,2. Specific examples: 1 is helium, 2 is CO2, and n1 will be less than n2 In this case,
q(T1_to T2)T2
3A,Scientists from the 17th to 18th centuries believed that knowledge like 2A could be forgiven.
3B, scientists in the 21st century still believe in knowledge like 2A, which would be a bit foolish.
4B, see simulation case (image) for details
Yes, I know you posted that a while ago. You received legitimate criticism for it and now you hope nobody notices when you just repost it.
In case you were wondering: people around here have noticed what you are doing. That's what I meant by brain jogging: your posts are neat "find the error" exercises, and that's what we use them for.
Radiation cooling, heating without consuming external work.
This is a simulation case of COMSOL radiation, with settings that satisfy radiation empirical laws and energy conservation. Please refer to the image for details:
1. This setting includes radiation experience: when the gas density is low, the radiation intensity is proportional to the density, and the absorption coefficient is inversely proportional to the density (the smaller the absorption coefficient, the stronger the absorption capacity)----- Domain 1 gas density=1, Domain 2 gas density=2.
2. Radiation generates a temperature difference of 2.1 ℃, rendering the second law of thermodynamics invalid.
3. This transposition can be connected in series to generate stronger heating and cooling capabilities, with low cost, and can be industrialized and commercialized.
See links and images for detailsArticle Using COMSOL to Prove the Temperature Difference Caused by A...
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