WEBVTT

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welcome to lonus Tech tips today's video is all about building and using a 6 foot

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tall evaporative cooler to cool down a core i7 extreme Edition processor this

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is colloquially known as bong cooling so

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sit back relax get real relaxed and

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enjoy

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for free at the link in the video description so some of you are probably

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asking yourselves is he serious right now and the answer is yes let's begin

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then with some Theory traditional PC coolers like heat sinks and closed loop

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water cooling systems and even fully custom water coolers can deliver

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fantastic results for overclock ERS and silence enthusiasts but sadly videos

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like this showing -10 to -2° CPU

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temperatures with a bunch of fans on a radiator will always be shockingly

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effectively however epic trolls through

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the miracle of video editing TTL who legitimately has plenty of gear capable

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of reaching those temps swapped in some screen cap of a different cooling system

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and we know this because three cheer for Science and the laws of thermodynamics

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heat just like water or nutrients across

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the membrane of a cell naturally flows from an area of higher temperature one

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with a higher average kinetic energy of its molecules and atoms to one of lower

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temperature so as air let's say it's 22°

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C passes over a heat sink that's sitting

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at around 50° C due to its absorption of

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thermal energy from a CPU underneath that thermal energy naturally transfers

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from the hot heat sink to the cooler surrounding air where it can be blown

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out of window or whatever and The Wider the difference in temperature between

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the heat sink and the air the faster this transfer takes place which is why

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you'll reach a maximum load temperature while running a game for 15 to 30

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minutes instead of it just continuing to rise cool right sure it is but all

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cooling systems that rely on the these principles inherently share a hard

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performance limit that is to say that no matter how many heat pipes radiators or

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cooling fans you add you can never get

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below the temperature of the air around you well hold on a second lonus what

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about wind chill when I put my ARM out the window of my car it feels a whole

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hell of a lot cooler cruising down the highway than sitting at a red light even

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when it's really hot outside well that is because you are made of water water

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the effect that you're feeling is called evaporative cooling and it works thanks

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to a neat little concept called stick with me here we're almost done the

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enthalpy of vaporization in simple terms

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for a given mass of fluid to change phases for example from liquid to gas

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energy must be either absorbed or

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released ice can be colder than Z

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degrees fun fact and water vapor can be hot enough to burn you or hot enough to

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freaking cook you but not while it is in

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the midst of a phase change that's why

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the mixture of ice and water in your glass stays at exactly 0° C until all of

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the ice is melted and that's why your Boiling Pot of water on the stove stays

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at exactly 100° until all the water

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evaporates and then you need to buy a new piece of cookware the heat energy

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being added by the Sun or the cooking element is being used to break hydrogen

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bonds between H2O molecules before the

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new phase can continue to heat up so as long as you keep adding ice or water to

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that two-phase mixture the temperature remains constant okay then so bong

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cooling you don't have to put water on a

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stove for it to evaporate otherwise I mean how would the glass of water you

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spill on the carpet Ever Dry more heat

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just speeds up this process and if you've ever tried to clean up a spill

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before Mom notices it you probably also know that more air flow maybe in the

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form of a fan makes this happen faster too so in a nutshell a bong cooler works

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by first creating small droplets of water with a shower head this gives the

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falling water more surface area making it easier to evaporate then dropping

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these water droplets down a cooling tower which causes the water molecules

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on the surface of the droplets to change phase to gas absorbing heat energy from

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the liquid water that remains in the falling droplet effectively cooling it

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we use fans then to blow air from the bottom of the cooling tower to the top

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to accelerate this process this allows

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us to potentially reach subambient

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temperatures assuming enough air flow big enough towers and favorable humidity

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and atmospheric pressure conditions this is at the cost however of losing to the

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room around us some of that liquid water

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so let's build it then shall we darus will be assisting me since I'll be in

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another country by the time this is being filmed here's what you'll need we

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took a lot of cues from this awesome build log over on overclock.net

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4in diameter PVC piping PVC joiners two

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120 mm fans with a power adapter for them as many shower heads as you will

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have cooling tower some wood a PVC y one

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per

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Tower a powerful pump to get water to

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the top of the shower heads 1/ in clear flexible tubing some miscellaneous 5/8

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in PVC fittings to join our tubing runs together and a normal CPU water block

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which leads us then to Moment of Truth time and here here are the results the

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advantage of bong cooling here is that we were able to beat the performance of

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a traditional ambient CPU Cooler without

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adding a significant electrical cost thermoelectric or pelti cooling air

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conditioning or phase change would incur these penalties and the higher your

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airflow our fans are actually kind of wimpy and the lower the humidity in your

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environment desert dwellers Rejoice the more effective this would be but there

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are some disadvantages as well it's kind of loud if you're not into the whole

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falling water relaxation thing it increases the humidity of the room it

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occupies it's large if you want it to work well and finally unless you were to

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rig up some kind of water level meter and an automated topup mechanism

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connected to your house Plumbing which is possible mind you you'll need to

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constantly top it up with water which is why most people don't don't build them

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but hey that's never stopped us before has it speaking of not being able to

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today as the kids

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say they don't say that do they so

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thanks for watching guys if this video sucked you know what to do but if it was

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