Seeking help with heat exchanger design; please advise, experts
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Dear experts, I’ve run into some problems while designing a heat exchanger. To put it frankly: I use water for cooling, and the temperature of the water rises from 20 degrees to 99 degrees; the volume of water used is relatively large. The process does not require a high pressure drop, so I used 4 heat exchangers in parallel, with 1,900 tubes in each exchanger, a tube center distance of 23 units, a length of 7 meters, and a nominal diameter of 3 meters. Isn’t the number of pipes a bit too high? What is the typical size of heat exchangers? Also, I feel that a temperature of 99 degrees for the circulating water isn’t very good. Do any experts have any suggestions regarding this? Thank you so much! ! ! !
I really don’t know what you’re talking about?
At a temperature of 99, boiling almost occurs; the heat exchange tubes should be arranged within the circular area designated for their placement, in order to ensure an adequate flow area at the inlet and outlet. As many heat exchange tubes as possible should be installed! The smallest possible heat exchange tubes can be used; for heat exchangers of the same specification, more rows of heat exchange tubes with smaller diameters are employed. Using a triangular arrangement results in more than using a square arrangement.
Reply to 2# wiseboy: Thank you~ I used Aspen to simulate it. It turns out that previously it was not necessary to add heat exchange; by using Aspen’s built-in heat exchange network directly, heat exchangers were created, and the results were quite good. Thank you again~
Reply to 3# Xiaoxiaobao521: Thank you so much! I initially used Aspen for the simulations, but later I found that it’s possible to integrate a heat exchange network first, which will then generate the heat exchange processes automatically – and the results are quite good. Thanks again!~
“Isn’t the number of pipes a bit too high? What is the typical size of heat exchangers? ”If you don’t even provide the data volume, how can anyone tell how “much” or “how little” there is in your pipeline? ! Generally, heat exchangers have anywhere from dozens to thousands of tubes; is such a wide range useful to you? !