Temperature crossover problem
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The current steam conditions are 0.2 MPA at 200°C, while the water pressure is 10 MPA; the desired temperature range is from 100°C to 135°C. From what I’ve seen, the saturated temperature is around 120°C. If a series heat exchanger is not used, temperature interference will occur! ! But even when connected in series, I found that temperature crossover still occurs. ! ! Please help to solve it
Thermal balance is fine; there’s only that much steam. . There isn’t much left. .
The maximum value of heat released is insufficient to meet the amount of heat absorbed. Calculate separately how much heat is released when the steam drops to 135, and how much heat is required for the cold medium to rise to 135.
This definitely isn’t satisfactory; what I mean is that a temperature crossover has occurred. If the steam temperature is 200-110, not only is there steam cooling, but most of the heat is also condensed, making it equal to the temperature on the water side of 100-135
Steam side flow rate: 10 T/H, water side: 150 T/H
Steam side flow rate: 10 T/H, water side: 150 T/H
Steam side flow rate: 10 T/H, water side: 150 T/H
You may not understand what temperature crossover means; heat transfer occurs from high temperatures to low temperatures, and when the temperature drops to 110 degrees, there is a large amount of heat that cannot be transferred. It’s impossible to achieve in actual engineering.