Selection of refrigerant for heat exchangers?
Thread Content
1. The temperature at the top of the distillation tower is 167°C; is it possible to cool it down to 80°C using circulating water? If possible, will the circulating water scale? 2. If the temperature of a certain fluid is 190°C, can it be cooled to 70°C using circulating water? Does circulating water scale? 3. What are the common causes of scaling in circulating water? The above discussion does not require consideration of heat energy recovery! Everyone is welcome to actively discuss and share their opinions!
I think it’s possible. Of course, you can use pure water for your circulating water, and by adding a water treatment unit and ensuring that the concentration ratio isn’t too high during operation, there should be no problems.
Since the temperature of the fluid is relatively high, it’s better to cool it first by air cooling
If the resistance requirements for the fluid are not very high, cooling it first by air and then by water is a good option
Scaling is possible; the temperature on the material side of our heat exchangers is only 75°C, and it drops to 40°C. Of course, the main reason for scaling is the low flow rate of the circulating water. Another cause of scaling is an excessive temperature rise, which also accelerates scaling.
Generally speaking, when the water temperature exceeds 55°, the likelihood of scaling increases significantly. As some fellow sailors have mentioned earlier, it is recommended to use air cooling first