- Apr 17, 2017
Thats a great link you found Andrew124C41, somehow in my hours of searching for a good tutorial, I never came across this one.
Good find :beer:
Good find :beer:
How about using ice? Make a cylindrical cavity with oring seal to house an ice cylinder in the host. Then make an ice tray from silicone or something to freeze ice "cartridges". I would guess you could get a 1/2 hour or more continuous duty from 1/2 pound of ice .So, I got to thinking that running back and forth to the store to pick up dry ice to cool the hot NUBM44 was getting a bit old. Paying high school kids to wave a hand fan at the diode proved not only inefficient but expensive.
While what I am about to propose is also inefficient, I wonder if it would work. One would have one set of batteries for the diode and another for cooling. Perhaps putting the 44 into an aluminum radial finned heatsink with one of these in between the sink and the module.
Otherwise, we are going to have to use mind over matter and just keep thinking cool!
TEC efficiency depends on how hard the TEC is run and how much heat is moved. I found a useful peltier calculator that I've been using to test some values for a multi-stage peltier cooled 638nm labby that I am working on.(TEC Calculator)Hi logsquared,
You have written that TECs are only 10% efficient.
I just have bought the so called "Beverage cooler&warmer" from ali and checked it. It cools 300g of wáter put inside of the can at rate of half ºC pro minute from rt to about 2-3ºC (that takes 1h but at rt cooling starts at rate of 1/2 degree pro min).
Knowing that 1 calorie (needed to cool 1g of wáter at 1ºC) = 4.2 Ws, it makes 10.5W of heat extraction while energy consumption (as was given in specs) is 12Vx3A = 36W.
So the TEC in it must be 29% efficient (if we only care about wasted energy).
I took the thing apart - the TEC inside was not bigger than ones purchased from ali before.
And if something is cooled from temperaures higher than rt to rt, the efficiency should be even higher, should not it?