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Peltier Heat Pump
High tech comes to Am Sci & Surp!! It is here in the form of a Peltier junction, a thermo-electric device that translates electric power into heat, and perversely, into cool. Apply current @ 3-12 VDC to the gizmo and it extracts thermal energy from one face, thereby cooling it. The heat is dumped onto the other face, thereby heating it. Please note: you must use a heat sink on the hot side or the junction will fry itself, since it can quickly create a 65° C temperature differential in a no load situation. Stack two, or build a cascade to increase the thermal differential created. Or run it backwards. Apply heat or cold to the relevant face and produce a current. Amazing for science projects and experiments. Practical for coffee warmers, beer coolers and mini-refrigerator or warming oven applications. Comes with instructions. Large is 1-9/16" sq. x 3/16" thick.
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89143 LARGER PELTIER JUNCTION |
Treat With Heat
Start with one naked wire or a number of them, and a piece of our clever tubing, and end up with nice, tightly covered wire. For the specific diameters below, our each is a package of (10) 12" pieces of heat-shrink tubing. For an assortment of sizes, our each is a dozen pieces of 4" long tubing. You'll get (4) pieces each in 1/8", 1/4" and 1/2" diameters. All sizes are black. All will shrink to trim diameters half their current size when heated to 125°C/257°F. If only it worked on waistlines.
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92441 1/2" SHRINK TUBE | |
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92440 1/4" SHRINK TUBE | |
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92439 1/8" SHRINK TUBE | |
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93365 1/8"-1/2" ASST. SHRINK TUBE |
Wanna Build A Broiler?
You might start with this. Or not. Frankly, we know it's a take-out, we just don't know what it was taken out of. It's got a big pair (7" long, U-shaped) of ceramic heating elements, mounted on a 5-1/2" L-shaped aluminum bracket with (4) heat switches wired in series before and after each element. It says it's rated 113°C at 12VDC. Each element draws approx 6A and the maximum temperature would be approx 600°-700°F. Switches are NC.
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37105 HEATING ELEMENT |
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