[TRNSYS-users] Transient behavior of the heat exchangers

[Jeff Thornton]

<I want to model a heat recovery unit and I need to get the transient
behavior of the unit before it reaches it is steady point, which is the
cast the existing heat exchangers in TRNSYS library are doing. I have the
scaling factor that should be multiplied by the steady-state effectiveness
to get the transient one, the only problem is I don't know how I can
define this in the code. Any suggestions??>

What are the independent variables in the scaling factor correlation? 
Time, temperature change, flow rate?  Based on your answer, I would
suggest re-coding the heat exchanger model to set the heat exchanger
effectiveness as a function of these independent variables.  On a TRNSYS
difficulty scale this is probably a 6 out of 10 as you need to be able to
re-code, re-compile, and re-link TRNSYS.

Jeff


Jeff Thornton
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