HTRI learning - Question and Answers

[muzaffar84]

Guys,

A forum fellow, who is new to HTRI, asked me a question (in personal message) regarding an issue. I got an idea that we should start a new thread for such questions. So that others can also get benefit of such discussion. I'm also a learner of HTRI, so it would be beneficial for me as well.

So here is the 1st question I got from joly165

I have a query. For the first time I'm designing a heat exchanger, I'm using HTRI software v 5.0 and then run the program I get the following warning:


"THE PHYSICAL PROPERTIES OF THE HOT FLUID HAVE BEEN EXTRAPOLATED BEYOND THE VALID TEMPERATURE RANGE. CHECK CALCULATED VALUES"

" AN INTERNAL TEMPERATURE CROSS EXISTS IN HE EXCHANGER. THE PROGRAM HANDLES THE REVERSE HEAT FLOW PROPERLY IN THE CALCULATIONS, BUT YOU MAY WANT TO CONSIDER CHANGING THE TERMINAL PROCESS CONDITIONS TO AVOID THE INTERNAL TEMPERATURE CROSS"


I would like to know how to avoid crossing temperature, so I would not get this warning again...