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Thread: Radiators and reserviors




  1. #11
    boondocks's Avatar
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    Default Re: Radiators and reserviors

    Quote Originally Posted by seross69 View Post
    I have a question about putting your radiator above your reservoir and pump. The Question is how will you keep the radiator full of water so it can be more efficient? If it is laying flat and you have the fittings facing down then how will you keep it full of water?? To me it seems they would be just enough water in it to move to the next fitting nothing to make it actually fill up. Water takes the path of least resistance and also tries to move to the lowest point and be level depending on the amount of water in system. </SPAN>

    Am I thinking wrong or not seeing something right??</SPAN>

    I have room in my case so I think I am going to turn the top radiator to where the fitting come out of the top this will add some resistance but will make sure that the radiator is full and doing its most efficient job. I think?? </SPAN>

    Can anyone add to this or help me see the engineering of the fluid hydraulics better??</SPAN>
    The system is sealed, there is no place for the water to go.

    The most important thing to do is place the reservoir before the pump in your loop, and for the reservoir to be higher than the pump. (there are exceptions to this, but I won't get into all that).

    Another thing to consider is that you will want to keep your tubing to a minimum, so as to have a decent flow. The more tubing, the longer the path the water takes, the more drop in pressure you get. Generally, real world testing shows that 1 gallon per minute and higher is considered optimum. After a certain point you need to add more pumping power. People do this by using multiple pumps, but in your average loop usually not necessary.

    Turning a radiator so the fittings face "up" is fine, although if it's at the top of the case it could mean more tubing = more pressure drop, and could be harder to bleed air out of the loop. Generally speaking you can face the radiator any direction you want, but like I say you want to use as little tubing as possible.
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  2. #12
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    Default Re: Radiators and reserviors

    boondocks,

    thank you for you answer and help and i will learn from what you say. by the time i get home and get it figured out i should have 1 more kick but cooling system and PC

  3. #13
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    Default Re: Radiators and reserviors

    boondocks,

    do i have to have a reservior in my system. the reason i am asking is i am going to run a water chiller at 5 to 10 c to cool a TEC on my CPU and i will have to insulate it if i am going to do this and i thought this would be ugly but if i need a reservior i will put a small one in and insulate it.

  4. #14
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    Default Re: Radiators and reserviors

    Here is one of my rigs, I labeled flow directions and major cooling components.
    Radiators and reserviors-demo-jpg
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  5. #15
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    Default Re: Radiators and reserviors

    Quote Originally Posted by seross69 View Post
    boondocks,

    do i have to have a reservior in my system. the reason i am asking is i am going to run a water chiller at 5 to 10 c to cool a TEC on my CPU and i will have to insulate it if i am going to do this and i thought this would be ugly but if i need a reservior i will put a small one in and insulate it.
    TEC is beyond my scope of knowledge. I don't see how you could prime your system without a res, it's easy to burn some of the pumps out if they run dry.
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  6. #16
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    Default Re: Radiators and reserviors

    Quote Originally Posted by seross69 View Post
    I have a question about putting your radiator above your reservoir and pump. The Question is how will you keep the radiator full of water so it can be more efficient? If it is laying flat and you have the fittings facing down then how will you keep it full of water?? To me it seems they would be just enough water in it to move to the next fitting nothing to make it actually fill up. Water takes the path of least resistance and also tries to move to the lowest point and be level depending on the amount of water in system. </SPAN>

    Am I thinking wrong or not seeing something right??</SPAN>

    I have room in my case so I think I am going to turn the top radiator to where the fitting come out of the top this will add some resistance but will make sure that the radiator is full and doing its most efficient job. I think?? </SPAN>

    Can anyone add to this or help me see the engineering of the fluid hydraulics better??</SPAN>
    Doh wish I hadn't been busy over the last day or so, so i'll try and answer your questions in pieces.

    Water stays in the rad very much like water stays in a straw if you plug the top. the pump/reservoir are typically sealed with the rest of the system thus preventing water from flowing unless the pump is running.

  7. #17
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    Default Re: Radiators and reserviors

    LOL nevermind. I should have read the WHOLE thread first... looks like boondocks has already answered :)


    Syn

  8. #18
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    Default Re: Radiators and reserviors

    Hey all, new here but thought I'd chime in...


    Having the two radiators "sandwiched" like you have described is really not at all ideal for your temps, as only one radiator will be getting cool air, with the other receiving already-warmed air having passed through the fins of the first and absorbed a certain degree of heat. This also means that, as the air will have become heated to a certain level, it's ability to carry heat from the second rad is diminished. Add the two together, as well as the reduced airflow from trying to essentially use a single fan configuration for what amounts to a 120mm-thick radiator, and you will get cooling that is no better, or only very marginally so, than a single radiator.

    I personally use a UT60 240 as my second rad in my loop, and they are absolutely phenomenal radiators, with one of the most linear "static pressure of fans-to-Watts dissipated" curves I've ever seen. Personally, I run a total of 4 Koolance 120x25mm 2600rpm fans in push pull, with each fan pushing 5.4mmH2O and 107.4cfm, and I really don't know if I could get it any cooler (other rad is an XSPC EX420 with 6 Bgears Blasters 140mm push-pull).


    I highly suggest that you NOT use a "rad sandwich" (two rads, one set of fans), and instead use the two radiators in two separate locations, each rad having its own set of fans (push, pull, or push-pull). The difference in temperatures are significant, and honestly you would simply be wasting a lot of money on a nice radiator that wouldn't do anything in the first setup. (I have actually experimented with this, so I have first-hand knowledge regarding this exact radiator; also, Martin did some serious testing about the Rad Sandwich, which is absolutely worth a read!).


    Anyway, hope that helps, and thanks for having me here!
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  9. #19
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    Default Re: Radiators and reserviors

    I agree. sandwiched fans/rads are not optimal. neither is having the rads at the bottom of the case either, but lots of people do it.. so why not? lol

    actually i'm even particular about fan placement. I don't myself even use the fans in a "push" method ever. Pressure against the rad coils from the fans can increase the temp (yea i know like maybe 1 degree?!? but it's 1 degree lol)
    fans in a pull configuration places a small vacuum between the rad and switch which cools the rad that extra little bit, and places the extra degree on the outside of the fan. (following conservation of energy of course)

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    Default Re: Radiators and reserviors

    nleksan thank you for the well written answer. I was going to experiment with this using temp sensors but since you have dont it I dont guess i need to. I also will be reading what Martin said i have read a lot of his information but had not seen anyting on Rad sandwiches. well thanks again and will have to modify my plans but cant wait to get started.

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