Quote:
Originally posted by bigben2k
Care to take a guess at my core? 2-304 (not received yet).
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You might want to wait till you have the heatercore in hand. Blackeagle's did not meet the specs shown on the website.
Keep in mind that the numbers my spreadsheet generates may be total BS. I realized I'd made a fundamental mistake in how the 'per tube' fudge factor was applied. I've since redone it with that factor applied 'correctly' and have redone the spreadsheet.
Correcting the 'per tube' fudge factor, required me to add an 'overhead' fudge factor. The overhead fudge factor accounts for inlet/outlet tubing and tanks and is assumed to be the same for all heatercores. (Obviously an oversimpification which begs the question, 'Why does the inlet and outlet tubing size vary between heatercores?")
My updated spreadsheet generates nearly identical curves to the previous one with substantially different equations and fudge factors. Don't believe that because it gets a reasonable match with test data, that it must be 'right'.
That said, I do believe that what I have now is much more plausible. (It bothered me that there was no 'overhead factor' in my last pass at it.)
I'll create a cleaned up, user friendly version of the spreadsheet tonight, and make it available for download here. Anyone with Excel can play around with it, and possibly refine it.