wrote in message
oups.com...
wrote:
Dave Martindale wrote:
And what's the crap about poor air film conductance on both sides of a
heat exchanger in a modern high efficiency furnace. If it's so damn
poor, how come these furnaces are 93%+ efficient? Could it be that
manufacturers know how to make heat exchangers that are efficient,
including using thinner metal and proper air flow techniques?
Scrubbing surfaces for better heat transfer IS the industries
proverbial _Let's Build a Better Mouse Trap_. Combustion efficiency
design and integration is already well established and has many choices
to meat a criteria.
What was interesting to watch is the Discovery Channel's Lance Armstrong
saga. Specifically, detailing the interaction of air to the surface of his
clothing.
It went from researching golf ball dimples to mother natures design of a
Tuna!
ISTR, dimpled and scaly surfaces were the focal points.
As relating to heat transfer, a couple of years ago there was a program
showing the advances of ancient peoples, and how their levels of
achievement ranked to modern times.
How interesting that a properly hammered Wok was shown to have the best
heat transfer of all other kinds of modern designed woks.
My point is there's room for improvement.
-zero