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<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2>Hello,</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial size=2>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.</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial size=2>I do not use glycol
as fluid , just water.</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial size=2>The timestep is
small (10s) and I tried to increase internal timestep , number of derivatives
with no significant improvement.</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial size=2>I thought it
was improved in TRNSYS 16 but I can't find the solution.</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2> </FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial size=2>Has anyone
encountered (and solved) this problem ?</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2>Thanks</FONT></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=538143715-18032008>
<DIV align=left><FONT color=#000080>
<DIV align=left><FONT face="Trebuchet MS" color=#000000 size=2>David
Chèze</FONT></DIV>
<DIV align=left><FONT face="Trebuchet MS" color=#000000
size=2></FONT> </DIV>
<DIV align=left><FONT face="Trebuchet MS" color=#000000
size=2></FONT> </DIV></FONT><FONT face="Trebuchet MS" color=#000000
size=2>**************************************************</FONT></DIV>
<DIV align=left><FONT face="Trebuchet MS" size=2>CLIPSOL - énergies
solaires</FONT></DIV>
<DIV align=left><FONT face="Trebuchet MS"
size=2>R&D Produit</FONT></DIV>
<DIV align=left><FONT face="Trebuchet MS" size=2>PAE Les
Combaruches</FONT></DIV>
<DIV align=left><FONT face="Trebuchet MS" size=2>73100 Aix-les-Bains -
FRANCE</FONT></DIV>
<DIV align=left><FONT face="Trebuchet MS"
size=2>+33(0)479349818</FONT></DIV></SPAN></DIV>
<DIV><SPAN class=538143715-18032008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
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