[TRNSYS-users] type 17's question

[LiDapeng]

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 type 17. Maybe my thought is wrong, but anyon!
 e can tell me the reasons about my question? Kind regards! Dapeng 
_________________________________________________________________
手机也能上 MSN 聊天了，快来试试吧！
http://mobile.msn.com.cn/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20080123/4063ac86/attachment-0005.htm>