When there is smoke condensation, what is the heat transfer temperature difference for preheating water?
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How do I calculate the heat transfer temperature difference for this? This isn’t pure steam, and it seems difficult to calculate. For pure steam condensation, it’s sufficient to consider it in stages; however, the flue gas temperature is 180 degrees, the outlet temperature is 50 degrees, and the dew point temperature of water vapor is 51.5 degrees. Is the temperature of the condensed water equal to the temperature of the liquid film? If so, the temperature of the liquid film is 43 degrees. In that case, how do we calculate the heat transfer temperature difference? I earnestly beg experts to provide an answer
In this case, the temperature of the liquid film is the average of the tube wall temperature and the temperature of the condensed liquid
Isn’t the temperature of the condensate the temperature of the liquid film? The temperature of the condensate is its dew point temperature, right (the saturated temperature at a certain partial pressure). So how is the heat transfer temperature difference calculated? The exhaust temperature at the back should be lower than the dew point temperature