[TRNSYS-users] pb convergence with type 60

[David Chèze]

Hello,
 
I can't find a good way using type 60 in yearly simulation :  to run until the end because of non convergence pb on heat exchanger's UA calculation : no problem when I use small flow rate (280L/h) and small tube's diameters (around 15mm) but no way if I try to run simulation with 280 L/h of flow rate and heat exchanger tube diameter around 30mm.
I do not use glycol as fluid , just water.
The timestep is small (10s) and I tried to increase internal timestep , number of derivatives with no significant improvement.
I thought it was improved in TRNSYS 16 but I can't find the solution.
 
Has anyone encountered (and solved) this problem ?
 
Thanks
 
David Chèze
 
 
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CLIPSOL - énergies solaires
R&D Produit
PAE Les Combaruches
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