Hybrid Car – More Fun with Less Gas

Parabolic Trough Target Improvement - Page 3

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Posted by Morris Dovey on September 4, 2009, 12:07 pm
daestrom wrote:

I don't have any way to capture video, but you can see some of other
people's in operation at


Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

Posted by Eric on September 5, 2009, 9:41 pm
Morris Dovey wrote:

Morris -
Its people like you who will give the common man "a leg up" on lowering
their energy bills. If i had money i would offer to fund your
experiments in a more formal setting, but. . . sorry, I'm just a working
stiff like most people.
Keep on keepin' on

Posted by Morris Dovey on September 2, 2009, 5:07 pm
 Morris Dovey wrote:

I think I'll need to organize this stuff better than I've done so far -
but I went ahead and added two "orphan" pages...

There's a page at


with a program that, given an absorption rate, approximates absorber
efficiencies for various interior angles. Please note that that a
displayed absorber efficiency of 100% will always be the result of
rounding a (lesser) calculated value to fit the format width.

Once you've picked an internal angle, there's a second page at


with another program that, given the groove interior angle and depth,
diameter of the collector tube, and the angular width of the target area
on the tube, calculates the values needed to actually produce such an

For MS users I've provided links on both pages to MS-DOS executables. To
download, right click on the link and select "Save target as" - then run
the program in an MS-DOS window.

Linux users can compile the C source with gcc and run it in an xterm (or

Everyone else is on their own. :)

Have fun!

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

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