How is evaporation calculated?
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In a 50L container, there is 1/2 to 2/3 of solid material in particle form, with a density of approximately 100 kg/m3; saturated water vapor at 180 degrees Celsius is then introduced to fluidize the material. How can the evaporation rate of the evaporator be calculated? How to choose a steam generator? This post was last edited by muquan on 2009-3-4 21:12]
:Lol, it’s indeed difficult. Could the original poster explain it in more detail?
Is what the poster is looking for this: Evaporation rate = Total volume of circulating water × (Return water temperature – Supply water temperature) × K, where the value is 0.0013 in spring and autumn, 0.0015 in summer, and 0.001 in winter. .
Evaporation lifts water from the ground into the air, while rain and snow are water from the air falling back to the ground. They are not only two opposing processes, but also two interdependent processes. If the moisture on the ground no longer enters the air through evaporation, it will be impossible to see rain or snow on Earth within 10 days. Evaporation is not only interdependent with precipitation, but it is also related to rivers on the ground. In extremely arid regions, precipitation is very low. Its actual evaporation amount is equal to its precipitation amount. There are no rivers on the ground there, not even dried-up streams. That’s the case in the desert areas of our country. In the source areas or upstream regions of rivers, the precipitation there is greater than the actual evaporation. This excess water forms rivers, which then flow slowly through the valleys into the oceans or lakes. In any natural watershed, evaporation, precipitation, and river flow are essentially in balance. In formula form, it is: For any closed drainage basin, the precipitation falling within the basin = evaporation amount + the volume of water flowing out of the basin.
Why is the poster passing steam into the container? Is it just to pass steam?
To determine the evaporation rate of an evaporator, it is necessary to know the properties of the substance inside the evaporator (temperature, boiling point, evaporation enthalpy, heat transfer coefficient, etc.). The heat in the vapor comes primarily from the latent heat of vaporization. The other part is the issue of heat balance. It’s similar to heat transfer calculations. Heat brought in by steam = Heat required for evaporation + Heat loss.
Is it calculated using the law of conservation of energy?