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Old 05-05-2013, 11:29 PM   #1651
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Quote:
Originally Posted by wicca27 View Post
darn you dk i cant have shrimp and you keep showing tigers... grrrrr.... almost as bad as gsd lol
I'm going to torture you until you become a Shrimptern.
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Old 05-05-2013, 11:39 PM   #1652
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Here's a shot showing the babies from her LAST batch... how close she's cycling. (Click this one to see it bigger.)


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Old 05-06-2013, 12:42 AM   #1653
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that is too cool. i have not been lucky enough to see one release babies. thanks for the shot. i really wish i could come be a shrimptern. hopefully one of these days
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Old 05-09-2013, 03:01 AM   #1654
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The work in the Shrimporium forces DK to learn so many new things.

Like today. Today, she learned that you can use PVC cement to glue styrene. While today she used it to glue PVC to styrene, you can bet DK filed this little gem away for someday when she wants to use PVC cement to glue some EPS for something handy. (EPS = expanded polystyrene = styrofoam)

The squirrely brain has all sorts of floating images of styrofoam sculptures going on, right now. Mebbe made out of foam coffee cups, from Costco in weird, 3-D configurations, accented with clusters of packing peanuts.

She's been working on a buncha micro-projects, having to do with FINALLY getting vapor CONTROL, this summer. While she waits for all her international electronics parts to come in.

Tomorrow: Totoro.
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Old 05-09-2013, 01:02 PM   #1655
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Originally Posted by DKShrimporium View Post
Here's a shot showing the babies from her LAST batch... how close she's cycling. (Click this one to see it bigger.)


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That's a great shot... Never seen babies come out before.
Thanks
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Old 05-09-2013, 05:50 PM   #1656
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Totoro

Wetwedding project 34

Sometimes (not infrequently, in DK's case), you get an idea that you just have to pursue. If this is enabled by useable parts lying about, more so.

Totoro sprang from DK's fascination with the usefulness of that fat lip, on the edge of the can. When she saw that lip, she filed it away to swim and bob about in the tossing waters of the squirrely brain, to ripen.

And then, by mistake, she ordered the wrong size tubing, for her plans.

She stared at the lovely peanut can, with that fat lip, and pondered her stupidity of wasting money on the wrong, non-returnable product, and fumed.

This was happening at the same time she was piecing together wetwedding plans, and pondering - obsessing, day-and-night - on how to optimize the system. Optimization for less maintenance time and cost, more fluid operation, and system longevity, which don't necessarily track together in the real world as parameters.

Reverse Osmosis membrane efficiency is a function of a few things. First, by quality of the membrane itself, so DK bought the gold standard, the Dow filmtec.

Second, by increasing the pressure differential across the membrane. You can do this by pushing harder on the front end, pulling harder on the back end, or both. DK has done both, using a pressure boosting pump on the front end and a permeate pump on the back end.

Sorta like our pictures last post, of raspberries in the jello, and the collander. If you want pure jello juice and want to ditch the raspberries, you push the jello mixture against the collander to squeeze out the jello and leave the raspberries in the waste stream. The harder you smash the jello into the collander, the faster you get jello juice and the more of it you get as the raspberry jello stream flows by.

But another way to increase efficiency is to increase the temperature of the feed water toward the ideal temperature for the membrane penetrance. Since DK's water is getting sucked out of the ground from a well deep down, it's pretty cool coming up into the sytem. Since DK's system is large capacity RO system, the water doesn't sit too long in the system before it's presented to the membrane, so it's not had time to warm up to room temperature.

Now, let's say we warm that raspberry jello up, to soupy. Imagine how much easier it is to squeeze the jello juice across that collander.

So, DK wanted to play around with warming the feed stream, to increase her reverse osmosis efficiency, and the peanut can and tubing were just the start.

What she made, Totoro, is a very crude heat exchanger, just to explore an idea. It's not by any means a very efficient one, due to the properties of pex tubing that conducts heat poorly. But it was enough to try an idea, get some data, see how it panned out.

And here, you see how she did it, with stuff from the barrels and bins. Down below, you can't see, but she made a clear Lexan plate to hold in the heat, but also allow out light to light her system during the run time, as a visual indicator it's running, and also to light her TDS monitor when needed.

She was able to change out the light bulb to different wattages, to see the effect, in fill time of the system. She originally wanted to track before and after exchanger heat using a temperature probe, but the ports for the probe wouldn't hold the system pressure without leaking, so she abandoned that method.

Without any bulb, system time to refill was 2 hours 36 minutes. An 18 watt spiral fluorescent bulb improved fill time by 4 minutes. She worked her way up to a 100 watt incandescent bulb, which took nearly half hour off her fill time! Crude, but she could definitely quantify the effects using fill times.

And, I think that's a-gonna be the end of Wetwedding posts.


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Old 05-09-2013, 06:38 PM   #1657
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interesting bit of info
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Old 05-09-2013, 06:49 PM   #1658
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Haha, my kids were going to make a Totoro out if Marimo balls, that's what I thought this would be!
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Old 05-09-2013, 08:30 PM   #1659
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Wouldn't it transfer heat faster and more efficently to submerge the pipe underwater and then use a small aquarium heater to heat the water?
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Old 05-09-2013, 09:56 PM   #1660
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Default Re: DK's m..a..d.. d..o..-i..n..g..s........

Why not get a higher wattage bulb socket, and a light designed specifically to produce heat. Might improve fill times even more. Oh, and switch out the tubing with something that is more heat conducive.

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Old 05-10-2013, 05:04 PM   #1661
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Wetwedding project 35

Quote:
Originally Posted by oblongshrimp View Post
Wouldn't it transfer heat faster and more efficently to submerge the pipe underwater and then use a small aquarium heater to heat the water?
The transfer I'm guessing would be a lot more efficient using water instead of air. (Water's greater heat capacity) On the other hand, the amount of energy needed to heat the water first, to heat the tubing, is much greater than the energy needed to heat air. (Water's heat capacity, again) But the reason I didn't pursue a more efficient transfer is that this was a lark, and I didn't want to put too much in between my pressure booster pump and my RO membranes, which is where it has to happen. The more infrastructure you put in between those two points to raise temperature, the more chance you are at the same time causing a drop in pressure, which is counter-productive (for example, by adding extra length of tubing to route the line off to a heated bath and through the bath and back again, which cannot be done in the peanut can location using water). The peanut can takes up little space exactly between them, to route tubing into water would have used a lot more real estate and added a lot more complexity.

Quote:
Originally Posted by amberoze View Post
Why not get a higher wattage bulb socket, and a light designed specifically to produce heat. Might improve fill times even more. Oh, and switch out the tubing with something that is more heat conducive.
That little peanut can and a 100 watt bulb are surprisingly good at doing this job. (They didn't change the product TDS at all, but they DID cut down the system time by 20% or so. DK has really, really pushed membrane efficiency using her pressure gradient, running the system at 80 psi, but if she was running it at 60 psi then working with system TEMPERATURE might make a big difference in the product stream TDS.) It's rather like a tiny car sitting in the sun - you know how much heat it can trap and hold in that car. The can forces the tubing close in proximity to the heat source, and allows very little heat to escape, except via transfer into the water.

Basically, DK has a database of geekiness she collects each project, and then she tries to play with ideas. In this case, she found this graph and her squirrely brain immediately said, "I wonder if I could move the dot..."

The objective in this case wasn't truly to optimize using temperature, because the system was already fairly optimized from the pressure differential and squeezing out the last bit of optimization using heat would be energy expensive for the return.

The objective was to play with the concept, as DK is wont to do, and see if she could get some real data to prove she "moved the dot."


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Old 05-13-2013, 01:15 AM   #1662
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Well.

Well, well, well.

DK had a Happy Mother's Day.

See below.


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Old 05-13-2013, 04:57 PM   #1663
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ha ha happy mothers day grandma lol
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Old 05-14-2013, 01:11 AM   #1664
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Originally Posted by wicca27 View Post
ha ha happy mothers day grandma lol
Thanks -- while the red tiger tank is cooking along nicely, she is not in it. She is part of my multi-ethnic neighborhood project.

**********

IN OTHER NEWS:

Yesterday, we celebrated the one week mark of a new establishment, DK's foray into the franchise world. You see, the Mermaid Bar and Grille had become such a draw and the neighborhood has filled out so much that she decided to add the Upper Plateau Mermaid Bar and Grille to her portfolio, encouraging her Mermaids to split the population between the lowlanders and the uplanders. In the week since we busted the champagne bottle across the bar counter, both in her franchise had had booming business a-goin' on. The Mermaids quite like the pub scene, and I must say it enables their hooking up lifestyle, we shan't draw any moralizing lessons thereof, however.

---

And finally, this is DK's project of last week. She didn't want to do it, it was tedious all around to think through, but she HAD to get it done, as part of her vapor control program this year, which dovetails (or will) with her Shrimpzone project, which is in progress (DK is pondering quite a bit on some executive level decisions in that project, at the moment).

BTW, the rubber balls are temporary, until DK finds just the right thing for plugs (she's thinking shot glasses will do the trick if she can find some the right size locally). The balls are somewhat problematic, as every time a certain 4 legged semi-feral hairy beast comes into the Shrimporium they are fodder for theft...


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Old 05-17-2013, 06:26 PM   #1665
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Shrimpzone project 07

OK, so DK's sometimes kinda anal. This never applies when considering dirty floors with dog hair, however.

But when she's doing a project that melds energy, shrimp production, cost, and fun, she can get anal.

She's been sitting, stewing, on the Shrimpzone project a couple weeks, now. She did Plan A, which would have worked, and she might use pieces of still. But the idea of MORE CONTROL, and BEST ENERGY USAGE just, well, nagged her.

So, she pondered.

She came up with her solution.

But first, we finish up Plan A for you, while we wait for her to finish Plan B and get it beta tested fully.

Back to Plan A, based upon The Syndicate principle. We shall explain that later, when the whole system is up and working, which will probably be within a few days.

After we pop-riveted on the Lexan plates, using small hinges, we then gave each opening a frame of weatherstripping. Now, when we close either plate, we can fully seal it off.

To close a plate, we swing the Lexan closed, then fasten using our handy newest thingys, which were installed with a bit of Gorilla glue.

So, here we see our Plan A louver, which is now fully mounted onto the main air trunk to the house, so it gets air before ANYTHING else does.

It's configured to be quite variable, or totally sealed off. We can open one or both of the halves, and adjust the vanes of either half as well.


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