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 cool down to 195-degree saturated water and then to 155 degrees?
It depends on the pressure on the steam side inside the heat exchanger, as well as the condensation temperature at that pressure.
Basically, a heat exchanger utilizes steam for heating, taking advantage of its \"latent heat\" rather than its sensible heat. Therefore, generally speaking, when steam passes through a heat exchanger, only a phase change occurs and there is no temperature drop; to achieve a temperature drop, additional equipment is usually needed...
First condense and then subcool; if the heat exchange design is not proper, the degree of subcooling will be very small