A stronger fan might increase the heat transferred by convection.Usually the amount of heat transferred into air is quite limited. So a stronger fan might not help very much, but it would certainly make the printer louder.
Hmm... On the other hand, for some reason Ultimaker chose pretty much the most powerful (and noisiest) more or less mainstream fan which was available. For instance, Papst does not produce equally powerful fans in that size, AFAIK. I came to think of a stronger fan also because of the simulations in this post:
http://umforum.ultimaker.com/index.php?/topic/5953-idea-on-underextrusion/?p=54477
Maybe having more airflow also around the Teflon part would help? One reason why I'm so interested in the topic is my closed printing chamber - where the temperature could (and kind of should) become higher than normal ambient temperature.
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A stronger fan might increase the heat transferred by convection.Usually the amount of heat transferred into air is quite limited. So a stronger fan might not help very much, but it would certainly make the printer louder.
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