On Oct 7, 2011, at 10:04 PM, Mark Iverson-ZeroPoint wrote:
The Tout thermocouple being within an inch or two of the hot steam
flow into
the heat exchanger does not sit well w/me...
From watching Lewan's video again, the external heat exchanger
(XHX) was
operated in counter-current flow, where the steam from the primary
circuit
flowed opposite to the water flow in the secondary circuit. Yeah,
yeah, we
don't really know how that XHX is constructed, but let's just look
at the
inlet/outlet physical locations on both sides of it. The steam
entered the
same side of the XHX as did the out-flowing heated water from the
secondary
side. So we are assuming that the metal fitting to which the
thermocouple
was attached, was at the temperature of the water flowing inside
and was not
influenced by the 120+C steam that was entering only an inch or two
away
from the thermocouple??? Just doesn't sit well w/me...
...now I can go to bed.
-m
"You may be an undigested bit of beef, a blot of mustard, a crumb of
cheese, a fragment of underdone potato. There's more of gravy than of
grave about you, whatever you are!"
"External heat and cold had little influence on Scrooge. No warmth
could warm, no wintry weather chill him. No wind that blew was
bitterer than he, no falling snow was more intent upon its purpose,
no pelting rain less open to entreaty."
A Christmas Carol, Charles Dickens
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
