What You Don't Learn About Plate Heat Exchanger in Uni....
For those chemical engineers who're new, or chemical engineering students, or chemical engineers who have not yet experience dealing or operating a plate heat exchanger, well, this plate heat exchager (PHE) is not as simple as what we see in those any heat transfer text book or Perrys.
Nobody teaches you how to take care, operate, change plates, change gasket of the PHE. You don't get this information in the text book. The text book only have some theory and example of calculating the overall heat transfer coefficient, Log mean temperature difference (LMTD) and few other formulas.... You'll ONLY get the knowledge went you deal with it, or learn it from your senior engineer, or from your supervisor or fitters/technician. We were also not thought of how long is the life spent of the PHE?! How long is the time where the PHE can work with highest efficiency of doing its' main job of tranfering heat between two liquids?? How many plates are we supposed to allocate for a heat exchager?? We never learn all those stuff in university....We learn them went we deal with them....It's quite difficult to discuss about the operation and other related issues regarding the PHE. It will be a long discussion. Later in future, i'll keep on posting slowly related issues regarding the PHE.
The most basic thing about PHE is that we want to "exchange heat"....We want some cold fluid to reach certain desired temperature higher than before and some hot fluid to reach a lower designated temperature. Well, sometimes you don't get the desired temperature too. Well...many reasons for that...check the flow rate....the flowrate affects the final temperature....Check the fouling at the plate and frame....is it serious....is the heat exchange efficient....?? Huhhh...lot's of thing to put here....but let me post them later on....enough info for today...ok...
posted by alzack @ 7:06 PM,
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The Author
I’m Zaki. I used to be a project, process and chemical engineer. I'm now employed as a chemical engineering lecturer, but now I'm on my Ph.D study leave. Hope you like reading my blog. I welcome any feedback from you. TQ!
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