[RE-wrenches] immersed heat exchangers

[Karl Schwingel]

Hi All,

I'm looking for any engineering numbers/places to look for calculating 
heat transfer thru immersed heat exchangers.
IE how many BTUs can  I expect to pick up/deposit to/from a tank at a 
given mean water temp in the tank and X mean temp differential in the coil.

I'm trying to move beyond the "rules of thumb" available, and do some 
real calculations based on flow, the available BTUs from the panels, or 
the BTUs that I expect to need to move into the floor at  a low temp or 
a fan convector at higher temps to determine coil size.

also has anyone here used the stainless "slim Jims"  designed for pond 
source heat pumps for immersion in solar tanks (obviously for really big 
squareish tanks)

any help or direction appreciated.  even if someone can point me to an 
engineer that's done that sort of thing for you. 

thanks,

karl

-- 
Karl Schwingel
NABCEP Certified Solar Thermal Installer
NorthWind Renewable Energy LLC

PO Box 723 Stevens Point, WI 54481
Karl at Northwindre.com
Cell: 715 209 0446
Fax : 715 952 4501


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