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Old 01-27-2005, 10:41 PM   #1 (permalink)
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Another Homemade Onboard Shower

well, seen a few different designs. heard alot of guys complaining the performace of their shower was nothing to write home about. trying a different approach.
using 3" copper, 18" long. (14) 3/8 copper tubes 19" long (22' total). (4) 3" copper caps. pics pretty much show the design.
coolant floods the 3" copper. fresh water/shower water through the 3/8 tubes. the design is to have many 3/8's tubes all in parallel and equally spaced apart (to prevent cool spots that can occur between two tubes too close together). this will slow the velocity of the fresh water enough to allow for proper heat exchange to take place. of course for proper heat exchange to take place, and something that is commonly overlooked, is addequate flow rate/gpm of media 1 (coolant), flow rate/gpm of media 2 (fresh water), and in relation to the design of the heat exchanger and it's requirements.
did i figure any of this technical stuff out. hell no, who has time for that? wouldn't want anyone thinking i put too much thought into it. especially if it doesn't work worth a crap.
pump's gonna be about 3 gpm and may end up having to choke it down to slow flow for more heat transfer. haven't hooked it up yet. i'll let ya know when i do.
any thoughts on this design?
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Last edited by rustynuts; 01-28-2005 at 09:29 AM.
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Old 01-27-2005, 10:46 PM   #2 (permalink)
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Looks like the sam design as a chiller.

Very effective in teh mechanical industry, so much as that it hasn't change in years...
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Old 01-27-2005, 10:49 PM   #3 (permalink)
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Originally Posted by lil-bronc
Looks like the sam design as a chiller.

Very effective in teh mechanical industry, so much as that it hasn't change in years...

===========

yup, you got it. flooded evaperator or shell and tube condenser on a chiller.
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Old 01-27-2005, 10:51 PM   #4 (permalink)
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definately some good practice with the torch to braze thinwall 3/8 tubing to the thick ass 3" copper cap. patience required.
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Old 01-27-2005, 10:55 PM   #5 (permalink)
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freshwater chamber brazed on. just but welded the cap right on top the other cap.
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Old 01-27-2005, 10:56 PM   #6 (permalink)
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real men take a bath in the icy cold mountain waters and use biodegradeable soap.....just kidding...looks cool....keep us posted.....do you want to make these for sale or just as a project???
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Old 01-27-2005, 11:00 PM   #7 (permalink)
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total package is 22 1/4" long. staggered the 4 holes so the 4 lines can be ran as a tight bundle. still need to braze my 3/4" female adapters (female threaded bungs)
more pics when i finish.
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Old 01-27-2005, 11:00 PM   #8 (permalink)
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why not put some baffles in the main body to force the water flow over the pipes.
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Old 01-27-2005, 11:02 PM   #9 (permalink)
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Aint you got enough shit zip tied to that buggy allready?
That is one bad ass looking wind chime though, nice work.
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Old 01-27-2005, 11:11 PM   #10 (permalink)
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Looks like it will work pretty good. Just wouldn't be the same for me though unless I get to freeze my nads off after a swim in a lake
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Old 01-27-2005, 11:14 PM   #11 (permalink)
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Quote:
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why not put some baffles in the main body to force the water flow over the pipes.

=========

baffles would help just tough to get them inside the tube with 14 little fawking tubes falling all over the damn place and moving on you every time you,,,,,,, it's just tough. thought about dimpling the 3/8 tubes to help get the fresh water swirling through the tubes also.

basically, didn't want to put anymore time into polishing a potential turd. no what i'm saying? but i did polish it. if it works as planned and it's enough to keep me from stuffing an m1000 into, i may add more to the design. we'll see.



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Aint you got enough shit zip tied to that buggy allready?
That is one bad ass looking wind chime though, nice work.
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Old 01-27-2005, 11:18 PM   #12 (permalink)
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This is all you have after a week and i thought you had to much time on your hands .Looks good, let us know how it works, although i would have just bought the one George has,that is if i cared enough to take a shower on the trail.
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Old 01-27-2005, 11:19 PM   #13 (permalink)
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Originally Posted by 85blue4runner
real men take a bath in the icy cold mountain waters and use biodegradeable soap.....just kidding...looks cool....keep us posted.....do you want to make these for sale or just as a project???

============

why, you want me to make one for you? what's it worth to ya?

============

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This is all you have after a week and i thought you had to much time on your hands .Looks good, let us know how it works, although i would have just bought the one George has,that is if i cared enough to take a shower on the trail.
============

well, if i didn't have a silicon valley house payment, my broke ass would buy one. donations always accepted, typically in the form of alchchchchchohol.
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Old 01-27-2005, 11:22 PM   #14 (permalink)
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i understand. lots of time into something that may just work as well as something off the shelf for 50 bucks.
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Old 01-27-2005, 11:23 PM   #15 (permalink)
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and your line thing is...different. but hey, everyones got their thing.
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Old 01-27-2005, 11:27 PM   #16 (permalink)
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Old 01-27-2005, 11:36 PM   #17 (permalink)
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-----------------------------------

and your line thing is...different. but hey, everyones got their thing.
=============

what's this ,thing, you speak of?
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Old 01-28-2005, 01:28 AM   #18 (permalink)
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=============

what's this ,thing, you speak of?

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Old 01-28-2005, 01:41 AM   #19 (permalink)
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Awesome!! I thought about a way to make a tube exchanger like this many times.. to see it done like this is sweet. If you dont mind I am going to copy some of your design and modify it a bit.. after I see your results of course.

I know this sounds silly but what liquid are you going to put where?? On tube coolers we use on ships we have the raw water (salt water) going through the tubes, and the coolant outside of the tubes.

Drat, Now you've got me all curious Im going to pull out my literature on tube coolers.

Looking forward to seeing it in action.

Russ
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Old 01-28-2005, 02:40 AM   #20 (permalink)
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I dig it
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Old 01-28-2005, 04:10 AM   #21 (permalink)
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Interesting, keep posting on the performance of this heat exchanger once you get to do field testing.

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Old 01-28-2005, 04:39 AM   #22 (permalink)
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based on my experiences that will work super !!! I had a 20' copper made into a coil that i could slip over the tail pipe and circualte water through and with a soup can baffle it worked 'ok' and 'good' after a 2-3 pass...

what you made is really all you need to get good heat transfer... water/water is the way to go...

and even warm water is nice after a long day...

nice!!!

edit: oh ya i wouldnt worry so much about needing more heat transfer but think about a cold water mixer either at the output or shower head..
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Old 01-28-2005, 06:36 AM   #23 (permalink)
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For those of you that want bitchin hot water, put marine block exhaust maniforlds your engine and run water through the coolent holes in those. Can find used ones on ebay for 350's for a dime a dozen.
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Old 01-28-2005, 08:18 AM   #24 (permalink)
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Quote:
Originally Posted by lil-bronc
Looks like the sam design as a chiller.

Very effective in the mechanical industry, so much as that it hasn't change in years...
What he said ^^^^

Your design is standard in the dairy industry and likely the most efficient way.
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Old 01-28-2005, 09:28 AM   #25 (permalink)
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Cummins 855 engines use them to cool oil; they're kind of big though. I've thought about snagging a few to try out (I can't remember how they mount).

Been thinking about doing something like you're doing...post up with results!
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