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Relationship between evaporator evaporation rate and heat transfer area

2019-08-18 View Original

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May I ask how to calculate the relationship between the evaporation rate and the heat transfer area of an evaporator due to scaling issues?
Reply #2 2019-08-19
““The relationship between evaporation rate and heat transfer area caused by scaling issues”? Try to answer it :) Scaling, I would say, has little to do with the heat exchange area; the heat exchange area of a heat exchanger (evaporator) is fixed. Does it matter the heat exchange area of the medium? ? ? Let’s explain it from a different perspective: the heat exchange area remains constant, that’s fixed. First, let’s take a look at the various factors related to the heat exchanger. As the heat transfer mechanism in a heat exchanger, there is a heat transfer film coefficient for the hot fluid medium in contact with the wall of the heat exchanger, the thermal conductivity of the metal material constituting the heat exchanger, and a heat transfer film coefficient for the cold fluid medium; these factors together constitute the thermal resistance to heat transfer. When discussing \"scaling,\" should we take into account the thermal resistance generated by this medium? I think it would be better to post the problem you want to solve so that we can discuss it. Because the conditions required for calculating the problems you set are very stringent. Not all phenomena can be calculated; calculation requires conditional data, and conditional data needs to be measured. Thus, the biggest problem is the method of measurement, which is the greatest challenge. These days, it’s common to see the word \"calculation\" used when people mention problems. When mentioning this term, it’s best to consider whether, in the event that measurement is not possible, changes in other factors could be taken into account to determine an answer to the problem you are trying to solve. It’s just casual talk, for reference only.

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