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Syn's 850g.t.v Deep Brain system

Discussion in 'Tank Builds' started by SynDen, Feb 17, 2015.

  1. SkyShark

    SkyShark Tuna Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    Have you tested the cooling capacity of this? I would think that the pex would insulate more than copper line would (which you obviously wouldn’t use).
     
  2. Dr.DiSilicate

    Dr.DiSilicate Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    I was kinda wondering the same thing. There must be some sort of equation...or some anecdotal evidence.


    Sent from my iPhone using MASC mobile app
     
  3. zombie

    zombie Tuna M.A.S.C Club Member

    There are equations for it. If the flow is high enough, the equation is simplified to a simple heat transfer model over the surface area of the pex between two temperatures and the thermal conductivity coefficient (like R value in home insulation but inverse) is lowered because of the insulating properties of the pex. If the flow isnt high enough, you have to also factor in the temperature drop or increase inside the pipe as well, which turns it into a fairly complex differential equation, but is still solvable.

    If I knew the associated variables: pex length, pex ID and OD, approximate temps of water lines, approximate tank target temp, and the wattage of the pump that drives them, I can run the simplified heat transfer model to determine the equivalent watts or BTU/hr of the system.

    Without actually running the calculations, I don't expect a huge effect because you need a large temp difference and a large surface area to do any real heating or cooling even if you used a high thermal conductivity material like titanium or copper.

    Sent from my SM-G965U using MASC mobile app
     
    Last edited: Aug 12, 2018
  4. SkyShark

    SkyShark Tuna Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    How long is the pex line? Did you say it’s coiled?
     
  5. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    True, copper does transfer the heat better, but only slightly better. Pex is used alot in radiant heating systems in some houses, where they run coils of pex under the floor boards. Pex is used specifically because it transfers heat so well, and is non conductive. The only better option to pex lines is Titanium, and well thats a bit out my price range, as it would likely cost somewhere between $5000 or so to have a titanium coil made
    There is about 50-60 ft worth of pex for each coil. I basically put as much as I could down there without taking up to much space in the chamber. I calculated it once when I was first planning, and I determined that 30-35 ft of tubing was the minimum amount required. By increasing the amount of surface area with more tubing, it should make it more efficient overall, as it will ensure full transfer of heat before the water reaches the end of the coil.
     
    Last edited: Aug 13, 2018
    SkyShark likes this.
  6. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    So hadnt been thinking about doing this for a while, and was bored at work today, so I decided to get the model out of the way.
    These are adjustable nozzles for the 1" lines on my close loop. Ocean motion makes something similar but they charge an arm and a leg since they are the only ones that do make them. So, I decided I should put my 3d skill to work on the model. Now just need to get them printed.
    Nozzle001.JPG nozzleexploded001.JPG
     
  7. SkyShark

    SkyShark Tuna Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    Nice! You got skills (skillz?)!!!
     
  8. TheRealChrisBrown

    TheRealChrisBrown Tuna Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    With a z...
     
    SkyShark likes this.
  9. Lmmchops

    Lmmchops Copepod M.A.S.C Club Member

  10. TheRealChrisBrown

    TheRealChrisBrown Tuna Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    What's the 3d printing file type? I've never printed anything that would press fit together and then rotate....was wondering if I could try to print a couple of pieces. My printer uses .STL files I think.
     
  11. Dr.DiSilicate

    Dr.DiSilicate Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    I can probably print them. Wanna send me the files? Michael.lemke@unco.edu

    Want abs? I also may be able to use the resin printer,depending on size, and they’ll be smooth.


    Sent from my iPhone using MASC mobile app
     
    TheRealChrisBrown likes this.
  12. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Ya I think stl is the standard for any 3D prints. I could send you a file to try. I need to test them a bit before I print all 4 sets anyway. Need to make sure it threads to 1inch pvc fitting, and need to make sure they can snap together and hold together


    Sent from my iPad using MASC mobile app
     
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  13. MuralReef

    MuralReef Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. MASC Vice-President

    The problem I had with my 3D prints that snapped together is the way the plastic is layered it lent itself to breaking when things snapped together. I tried to print locline flow accelerators and they didn't hold together. Best bet might be to get Lemke to print them on the resin printer.
     
    TheRealChrisBrown likes this.
  14. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Ya for sure, quality of material makes a big difference in these I'm sure. Most standard small printers likely dont use the most durable of materials, but can be useful for initial tests to make sure the sizing is all right.
     
  15. JuanGutz

    JuanGutz Marlin M.A.S.C Club Member

    Loving everything in this thread! So much to read and learn about. I want to get my new tank up and going but might wait till you set yours up so I can see it in action and steal ideas.
     
    SkyShark and SynDen like this.
  16. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Thanks guys! Always good to know that others can learn from my adventures in this obsession, especially since my wife just thinks I'm crazy lol
     
    JuanGutz and Dr.DiSilicate like this.
  17. NickP

    NickP Copepod Platinum Sponsor M.A.S.C Club Member

    I was reading this and remembered this thread on r2r. Not sure if this is aloud or not but this thread was all about using a titanium heat exchanger to heat his aquarium with his hot water heater for about 300 bucks. all parts are listed and assembly is explained. Probably to late for you but I read it a while back and found it interesting. It also states that pex can grow legionella which is very bad for you if left stagnate in pex. Not sure how accurate this is but you can check it out. The link for the heat exchanger is sold out but this is the same one but more expensive now. 100 bucks more or so
    https://www.ebay.com/itm/Titanium-T...058425&hash=item41dcdb4a4a:g:Z8wAAOSwKJhbT0Bg
    https://www.reef2reef.com/threads/h...r-save-40-on-energy-cost.338018/#post-4201054
     
    Last edited: Sep 28, 2018
  18. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Nice. Thanks for that, hadnt seen that particular thread. I may explore the titanium option at some point down the road. I did put drains in my lines so not really worried about anything stagnating, but Ill be monitoring its use over the first year to make sure it turns on at least once a day. He lists a cheaper version of the circ pump I need too, which is great. Most I had looked at were well over 200, but the one he is using is only 90. Will have to order that today :D
     
    Last edited: Sep 28, 2018
    NickP and TheRealChrisBrown like this.
  19. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Okay, finally back to making some progress on this build.
    Ordered a dual stage Ranco the other day and the hot water circ pump, and will be finishing up the heating system once it gets here.
    Also have been working on the flanges that go around each of the closed loop jets in the tank. I had some acrylic sheets cut out so I could fit a pvc coupler into them. Used some weld-on 40 to bond those together to make the flanges, then used weld-on 16 to bond those to the inside of the tank.
    Now if there is ever an issue with any of the 8 bulk heads that are exposed in the tank, I can shove a 4inch piece of pvc into them and create a temporary dam. The white are just about at the height I want for the sand bed so they will mostly vanish into the sand once its filled. The ones on the back I did in grey sch80 so that they mostly blend into the back too.
    Now I just need to get the nozzles for remaining outlets on the closed loop

    IMG_20190122_184644.jpg IMG_20190122_184619.jpg IMG_20190122_184559.jpg
     
  20. SynDen

    SynDen Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Crap I think I ordered the wrong Ranco. Ordered the 120/240 version but the valves for the system are 24v. DOH! The circulation pump is 115v though. Can I make those work together or need to just order a different controller?
     
    Last edited: Jan 23, 2019

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