Dear trnsys users,
Type 17 models a cascaded waste heat recovery system, e.g. only two heat exchangers in the system, one is as a primary heat exchanger and another is as a secondary heat exchanger. The mode of two heat exchangers are all assumed to counter mode.
I think the effect of type 17 is equal to two type 5. So I use two type5b(counter heat exchanger) instead of a type 17 and the connection between two type 5b is given as: the output 3 and 4 of a type 5 as the secondary heat exchanger in type 17 are connected to the input 1 and 2 of another type 5 as the primary heat exchanger in type 17; and the output 3 and 4 of a type 5 as the primary heat exchanger in type 17 are connected to the input 1 and 2 of another type 5 as the secondary heat exchanger in type 17. The other parameters in two type 5 are set the same as the corresponded parameters in type 17.
But the results from two type 5 are quitely different of the one from a typ!
e 17. Maybe my thought is wrong, but anyone can tell me the reasons about my question?
Kind regards!
Dapeng
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