Uxcell a11050900ux0324 Uxcell
Why we love it?
Max Switching Current : 0.5A;Max Breakdown Voltage : 220V DC; Max Carry Current : 1.0A;Max Contact Resistance : 100mohm Temperature Rating : -10 ~ +60 C / 85 Float Ball Material : PP; Float Body Material : PP; Float Ball Size(Approx.) : 15.3 x 23.5mm / 0.602” x 0.925”(L*D)
Some comments about this we saw on the web:
* /u/checkitoutmyfriend on /r/BurningMan A couple of things to know about evaporative cooling. Ice or cold water does not improve cooling, it actually hinders it. In fact it works better if the water is hot. Google it for more of an explanation why this is true but basically evaporative cooling is ‘boiling’ water to a gas. So don’t throw ice in there. Use it for drinks…. ;)The next is air flow and wetting of the pads. Air flow should be even and the pads fully wet. No dry spots. Now when you first fire it up it will take a minute or two to get the pads fully soaked. This is where you see him adding more holes in the ‘header’ tubing to get more water where the pads are dry. Dry spots also have less restriction than wet so the air will flow through these spots more than the wet, defeating what we are trying to do. I do like his ‘hot wire poker’ for making the holes. Much better than a knife or drill.
Finally, The space you are cooling needs someplace for the air inside to go. Think of your tent like a balloon. Obviously, it is not completely air tight like a balloon, but close. If you have all the vents sealed up like you do to keep dust at bay on the playa, with a large enough fan you could blow it up like a balloon all fat a puffy. The problem is once the fan packs the air into the tent with nowhere to go, the air flow slows down through the cooler, reducing the efficiency of your cooler. So you will need to play with opening a vent, preferably up high, (hot air rises). Having a positive pressure inside the tent is a good thing as it will also help to keep the dust out. But not so much that it reduces the air flow through the cooler. Experiment to find the happy medium. Now if you tent leaks like a sieve, you may not to open any vents. ;)
I am making a slightly larger unit than the HD bucket cooler but not as large as FIGJAM’s Trash Can evap. Notice his tent is ‘slightly’ puffy. Side panels bow out, not hang in like normal. Now if you go the trash can route, do be aware how much air an automotive radiator fan moves. Many newer vehicles have electric radiator fans. Open the hood when its running and note the air flow. There are ways to slow them down but we can talk about that later if needed.
I am using a storage bin similar to this one It has ‘keeper lathes’ on each end to keep the lid in place. And the lid itself is flat for mounting 2 fans and 2 PVC/ABS fittings on top.
Let me also note that I will have unlimited 12VDC power (two deep cycle marine batteries) and will not be using solar panels. But the wiring is the same. You will need to calculate the power requirements of the fan(s) and pump to buy the correct panel if you’re going to go this way.
Here is what I have arriving tomorrow.
My unit is actually for grey water evaporation, but the theory is the same. This float switch is to shut things down when the water level is too low for the pump. I most likely won’t be there when this happens and don’t want to hang around waiting for it finish. For cooling just keep an eye on the water level and ad as required.
The media(pads) you can get at HD, Lowes, or any air conditioning supply house. I do like the expanded paper media opposed to the poly fiber. Either will do the job.
The ABS/PVC fittings, tubing & barb fittings from the same vendors.
I am going to use larger PVC(white)/ABS(black) fittings then FIGJAM. The fan is 12cm which is approximately 4-3⁄4”. PVC pipe is not quite 4”, ABS just over 4”. I may go 5” PVC, ABS does not come in 5” so I would need to go to 6”. The reason for this change is these fans are not design for much positive pressure. So the smaller 4” fittings/pipe does restrict the air flow some. The larger fittings allow the fan to have less pressure, thus more air flow. Will the average burner notice the difference? Probably not but I tend to over engineer things so bigger I will go.
When you price these fittings, do be sitting down. They are not $5 fittings.
Just realized the wall of text I have so I will stop here for now. I am building mine this next weekend and will take pics and post back if you like. For now what questions would you have after this and the other links provided?
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