195-degree saturated steam is cooled by 40 degrees after passing through the heat exchanger
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Question: When 195-degree saturated steam is cooled by 40 degrees through a heat exchanger, does it first turn into 195-degree saturated water and then cool down to 155 degrees? Does saturated steam at 195 degrees turn into saturated steam at 155 degrees?
First turn it into water and then cool it down, but I don’t think there’s much point in studying this. Scientific research is meaningful, but it’s of little use for industrial operations
First, the steam is turned into water and then cooled. The process involves: saturated steam at 195 degrees turning into water at 195 degrees after passing through a heat exchanger; thereafter, this water at 195 degrees undergoes further heat exchange to reach 155 degrees. However, this second step is not very useful, as the heat value is low and the heat exchange efficiency is poor, making it unsuitable for industrial use. It’s also not feasible to build extremely large heat exchangers; instead, latent heat is utilized
First it turns into water, then the temperature is lowered; latent heat is utilized first, followed by sensible heat, but the proportion of sensible heat is estimated to be very small
Check the operating pressure of your heat exchanger, and see if there are any resistance elements before steam enters the heat exchanger. Operating pressure corresponding to condensation temperature
Heat exchangers primarily make use of the latent heat of steam; when saturated steam at 195 degrees turns into saturated condensate at the same temperature, the presence of this condensate in the heat exchanger reduces the efficiency of heat exchange for the saturated steam. If the heat from saturated condensate is to be utilized, it can be recovered through low-pressure flashing and then used for heat exchange in equipment operating under low-pressure conditions.