Do you think, is it because the test data gives the details of only at steady state ?BvU said:Nope.
I agree. I think we need to hear more details. But it might be a decent approximation if UA where used in a dynamic case based on the instantaneous conditions. It depends.BvU said:I do. UA is an instantaneous value, a curve makes it a function of something.
On the other hand, dynamics of heat exchangers aren't often a focus (except perhaps in textbooks): I've always seen them treated as instantaneously reacting devices because the heat content of vessels, columns and reactors and such was so much greater. Do you have a particular application in mind ?
@Chestermiller : any experience ? -- and shouldn't we let the OP add some more context ?
My end objective is to make complete simulink model for rotory air compressor. So this heat exchanger will become one of the subsystem in my model. Can you tell me, if I am using a heat exchanger modeled with this approach can mimic the actual system functionality?BvU said:I do. UA is an instantaneous value, a curve makes it a function of something.
On the other hand, dynamics of heat exchangers aren't often a focus (except perhaps in textbooks): I've always seen them treated as instantaneously reacting devices because the heat content of vessels, columns and reactors and such was so much greater. Do you have a particular application in mind ?
@Chestermiller : any experience ? -- and shouldn't we let the OP add some more context ?
Like in this picture by Brian S. Elliott - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=66663474 ?Nikhil N said:complete simulink model for rotory air compressor